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Publisher: Springer-Verlag (Total: 2351 journals)

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Showing 1 - 200 of 2351 Journals sorted alphabetically
3D Printing in Medicine     Open Access   (Followers: 2)
3D Research     Hybrid Journal   (Followers: 21, SJR: 0.222, CiteScore: 1)
4OR: A Quarterly J. of Operations Research     Hybrid Journal   (Followers: 10, SJR: 0.825, CiteScore: 1)
AAPS J.     Hybrid Journal   (Followers: 25, SJR: 1.118, CiteScore: 4)
AAPS PharmSciTech     Hybrid Journal   (Followers: 7, SJR: 0.752, CiteScore: 3)
Abdominal Radiology     Hybrid Journal   (Followers: 17, SJR: 0.866, CiteScore: 2)
Abhandlungen aus dem Mathematischen Seminar der Universitat Hamburg     Hybrid Journal   (Followers: 4, SJR: 0.439, CiteScore: 0)
Academic Psychiatry     Full-text available via subscription   (Followers: 29, SJR: 0.53, CiteScore: 1)
Academic Questions     Hybrid Journal   (Followers: 8, SJR: 0.106, CiteScore: 0)
Accreditation and Quality Assurance: J. for Quality, Comparability and Reliability in Chemical Measurement     Hybrid Journal   (Followers: 31, SJR: 0.316, CiteScore: 1)
Acoustical Physics     Hybrid Journal   (Followers: 11, SJR: 0.359, CiteScore: 1)
Acoustics Australia     Hybrid Journal   (SJR: 0.232, CiteScore: 1)
Acta Analytica     Hybrid Journal   (Followers: 7, SJR: 0.367, CiteScore: 0)
Acta Applicandae Mathematicae     Hybrid Journal   (Followers: 1, SJR: 0.675, CiteScore: 1)
Acta Biotheoretica     Hybrid Journal   (Followers: 4, SJR: 0.284, CiteScore: 1)
Acta Diabetologica     Hybrid Journal   (Followers: 19, SJR: 1.587, CiteScore: 3)
Acta Endoscopica     Hybrid Journal   (Followers: 1)
acta ethologica     Hybrid Journal   (Followers: 4, SJR: 0.769, CiteScore: 1)
Acta Geochimica     Hybrid Journal   (Followers: 7, SJR: 0.24, CiteScore: 1)
Acta Geodaetica et Geophysica     Hybrid Journal   (Followers: 3, SJR: 0.305, CiteScore: 1)
Acta Geophysica     Hybrid Journal   (Followers: 11, SJR: 0.312, CiteScore: 1)
Acta Geotechnica     Hybrid Journal   (Followers: 7, SJR: 1.588, CiteScore: 3)
Acta Informatica     Hybrid Journal   (Followers: 5, SJR: 0.517, CiteScore: 1)
Acta Mathematica     Hybrid Journal   (Followers: 13, SJR: 7.066, CiteScore: 3)
Acta Mathematica Hungarica     Hybrid Journal   (Followers: 2, SJR: 0.452, CiteScore: 1)
Acta Mathematica Sinica, English Series     Hybrid Journal   (Followers: 6, SJR: 0.379, CiteScore: 1)
Acta Mathematica Vietnamica     Hybrid Journal   (SJR: 0.27, CiteScore: 0)
Acta Mathematicae Applicatae Sinica, English Series     Hybrid Journal   (SJR: 0.208, CiteScore: 0)
Acta Mechanica     Hybrid Journal   (Followers: 21, SJR: 1.04, CiteScore: 2)
Acta Mechanica Sinica     Hybrid Journal   (Followers: 5, SJR: 0.607, CiteScore: 2)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 7, SJR: 0.576, CiteScore: 2)
Acta Meteorologica Sinica     Hybrid Journal   (Followers: 3, SJR: 0.638, CiteScore: 1)
Acta Neurochirurgica     Hybrid Journal   (Followers: 7, SJR: 0.822, CiteScore: 2)
Acta Neurologica Belgica     Hybrid Journal   (Followers: 2, SJR: 0.376, CiteScore: 1)
Acta Neuropathologica     Hybrid Journal   (Followers: 4, SJR: 7.589, CiteScore: 12)
Acta Oceanologica Sinica     Hybrid Journal   (Followers: 3, SJR: 0.334, CiteScore: 1)
Acta Physiologiae Plantarum     Hybrid Journal   (Followers: 3, SJR: 0.574, CiteScore: 2)
Acta Politica     Hybrid Journal   (Followers: 19, SJR: 0.605, CiteScore: 1)
Activitas Nervosa Superior     Hybrid Journal   (SJR: 0.147, CiteScore: 0)
adhäsion KLEBEN & DICHTEN     Hybrid Journal   (Followers: 8, SJR: 0.103, CiteScore: 0)
ADHD Attention Deficit and Hyperactivity Disorders     Hybrid Journal   (Followers: 25, SJR: 0.72, CiteScore: 2)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 9)
Administration and Policy in Mental Health and Mental Health Services Research     Partially Free   (Followers: 18, SJR: 1.005, CiteScore: 2)
Adsorption     Hybrid Journal   (Followers: 5, SJR: 0.703, CiteScore: 2)
Advances in Applied Clifford Algebras     Hybrid Journal   (Followers: 4, SJR: 0.698, CiteScore: 1)
Advances in Atmospheric Sciences     Hybrid Journal   (Followers: 37, SJR: 0.956, CiteScore: 2)
Advances in Computational Mathematics     Hybrid Journal   (Followers: 20, SJR: 0.812, CiteScore: 1)
Advances in Contraception     Hybrid Journal   (Followers: 3)
Advances in Data Analysis and Classification     Hybrid Journal   (Followers: 58, SJR: 1.09, CiteScore: 1)
Advances in Gerontology     Partially Free   (Followers: 8, SJR: 0.144, CiteScore: 0)
Advances in Health Sciences Education     Hybrid Journal   (Followers: 32, SJR: 1.64, CiteScore: 2)
Advances in Manufacturing     Hybrid Journal   (Followers: 3, SJR: 0.475, CiteScore: 2)
Advances in Polymer Science     Hybrid Journal   (Followers: 45, SJR: 1.04, CiteScore: 3)
Advances in Therapy     Hybrid Journal   (Followers: 5, SJR: 1.075, CiteScore: 3)
Aegean Review of the Law of the Sea and Maritime Law     Hybrid Journal   (Followers: 7)
Aequationes Mathematicae     Hybrid Journal   (Followers: 2, SJR: 0.517, CiteScore: 1)
Aerobiologia     Hybrid Journal   (Followers: 3, SJR: 0.673, CiteScore: 2)
Aesthetic Plastic Surgery     Hybrid Journal   (Followers: 11, SJR: 0.825, CiteScore: 1)
African Archaeological Review     Hybrid Journal   (Followers: 21, SJR: 0.862, CiteScore: 1)
Afrika Matematika     Hybrid Journal   (Followers: 1, SJR: 0.235, CiteScore: 0)
AGE     Hybrid Journal   (Followers: 7)
Ageing Intl.     Hybrid Journal   (Followers: 7, SJR: 0.39, CiteScore: 1)
Aggiornamenti CIO     Hybrid Journal   (Followers: 1)
Aging Clinical and Experimental Research     Hybrid Journal   (Followers: 3, SJR: 0.67, CiteScore: 2)
Agricultural Research     Hybrid Journal   (Followers: 6, SJR: 0.276, CiteScore: 1)
Agriculture and Human Values     Open Access   (Followers: 14, SJR: 1.173, CiteScore: 3)
Agroforestry Systems     Open Access   (Followers: 20, SJR: 0.663, CiteScore: 1)
Agronomy for Sustainable Development     Open Access   (Followers: 15, SJR: 1.864, CiteScore: 6)
AI & Society     Hybrid Journal   (Followers: 9, SJR: 0.227, CiteScore: 1)
AIDS and Behavior     Hybrid Journal   (Followers: 14, SJR: 1.792, CiteScore: 3)
Air Quality, Atmosphere & Health     Hybrid Journal   (Followers: 4, SJR: 0.862, CiteScore: 3)
Akupunktur & Aurikulomedizin     Full-text available via subscription   (Followers: 1)
Algebra and Logic     Hybrid Journal   (Followers: 6, SJR: 0.531, CiteScore: 0)
Algebra Universalis     Hybrid Journal   (Followers: 2, SJR: 0.583, CiteScore: 1)
Algebras and Representation Theory     Hybrid Journal   (Followers: 1, SJR: 1.095, CiteScore: 1)
Algorithmica     Hybrid Journal   (Followers: 9, SJR: 0.56, CiteScore: 1)
Allergo J.     Full-text available via subscription   (Followers: 1, SJR: 0.234, CiteScore: 0)
Allergo J. Intl.     Hybrid Journal   (Followers: 2)
Alpine Botany     Hybrid Journal   (Followers: 5, SJR: 1.11, CiteScore: 3)
ALTEX : Alternatives to Animal Experimentation     Open Access   (Followers: 3)
AMBIO     Hybrid Journal   (Followers: 10, SJR: 1.569, CiteScore: 4)
American J. of Cardiovascular Drugs     Hybrid Journal   (Followers: 16, SJR: 0.951, CiteScore: 3)
American J. of Community Psychology     Hybrid Journal   (Followers: 29, SJR: 1.329, CiteScore: 2)
American J. of Criminal Justice     Hybrid Journal   (Followers: 9, SJR: 0.772, CiteScore: 1)
American J. of Cultural Sociology     Hybrid Journal   (Followers: 18, SJR: 0.46, CiteScore: 1)
American J. of Dance Therapy     Hybrid Journal   (Followers: 5, SJR: 0.181, CiteScore: 0)
American J. of Potato Research     Hybrid Journal   (Followers: 2, SJR: 0.611, CiteScore: 1)
American J. of Psychoanalysis     Hybrid Journal   (Followers: 22, SJR: 0.314, CiteScore: 0)
American Sociologist     Hybrid Journal   (Followers: 16, SJR: 0.35, CiteScore: 0)
Amino Acids     Hybrid Journal   (Followers: 7, SJR: 1.135, CiteScore: 3)
AMS Review     Partially Free   (Followers: 4)
Analog Integrated Circuits and Signal Processing     Hybrid Journal   (Followers: 7, SJR: 0.211, CiteScore: 1)
Analysis and Mathematical Physics     Hybrid Journal   (Followers: 6, SJR: 0.536, CiteScore: 1)
Analysis in Theory and Applications     Hybrid Journal   (Followers: 1)
Analysis of Verbal Behavior     Hybrid Journal   (Followers: 6)
Analytical and Bioanalytical Chemistry     Hybrid Journal   (Followers: 32, SJR: 0.978, CiteScore: 3)
Anatomical Science Intl.     Hybrid Journal   (Followers: 3, SJR: 0.367, CiteScore: 1)
Angewandte Schmerztherapie und Palliativmedizin     Hybrid Journal  
Angiogenesis     Hybrid Journal   (Followers: 3, SJR: 2.177, CiteScore: 5)
Animal Cognition     Hybrid Journal   (Followers: 20, SJR: 1.389, CiteScore: 3)
Annales françaises de médecine d'urgence     Hybrid Journal   (Followers: 1, SJR: 0.192, CiteScore: 0)
Annales Henri Poincaré     Hybrid Journal   (Followers: 3, SJR: 1.097, CiteScore: 2)
Annales mathématiques du Québec     Hybrid Journal   (Followers: 4, SJR: 0.438, CiteScore: 0)
Annali dell'Universita di Ferrara     Hybrid Journal   (SJR: 0.429, CiteScore: 0)
Annali di Matematica Pura ed Applicata     Hybrid Journal   (Followers: 1, SJR: 1.197, CiteScore: 1)
Annals of Biomedical Engineering     Hybrid Journal   (Followers: 17, SJR: 1.042, CiteScore: 3)
Annals of Combinatorics     Hybrid Journal   (Followers: 4, SJR: 0.932, CiteScore: 1)
Annals of Data Science     Hybrid Journal   (Followers: 12)
Annals of Dyslexia     Hybrid Journal   (Followers: 10, SJR: 0.85, CiteScore: 2)
Annals of Finance     Hybrid Journal   (Followers: 34, SJR: 0.579, CiteScore: 1)
Annals of Forest Science     Hybrid Journal   (Followers: 7, SJR: 0.986, CiteScore: 2)
Annals of Global Analysis and Geometry     Hybrid Journal   (Followers: 1, SJR: 1.228, CiteScore: 1)
Annals of Hematology     Hybrid Journal   (Followers: 16, SJR: 1.043, CiteScore: 2)
Annals of Mathematics and Artificial Intelligence     Hybrid Journal   (Followers: 12, SJR: 0.413, CiteScore: 1)
Annals of Microbiology     Hybrid Journal   (Followers: 11, SJR: 0.479, CiteScore: 2)
Annals of Nuclear Medicine     Hybrid Journal   (Followers: 5, SJR: 0.687, CiteScore: 2)
Annals of Operations Research     Hybrid Journal   (Followers: 10, SJR: 0.943, CiteScore: 2)
Annals of Ophthalmology     Hybrid Journal   (Followers: 13)
Annals of Regional Science     Hybrid Journal   (Followers: 8, SJR: 0.614, CiteScore: 1)
Annals of Software Engineering     Hybrid Journal   (Followers: 13)
Annals of Solid and Structural Mechanics     Hybrid Journal   (Followers: 9, SJR: 0.239, CiteScore: 1)
Annals of Surgical Oncology     Hybrid Journal   (Followers: 15, SJR: 1.986, CiteScore: 4)
Annals of Telecommunications     Hybrid Journal   (Followers: 9, SJR: 0.223, CiteScore: 1)
Annals of the Institute of Statistical Mathematics     Hybrid Journal   (Followers: 1, SJR: 1.495, CiteScore: 1)
Antonie van Leeuwenhoek     Hybrid Journal   (Followers: 5, SJR: 0.834, CiteScore: 2)
Apidologie     Hybrid Journal   (Followers: 4, SJR: 1.22, CiteScore: 3)
APOPTOSIS     Hybrid Journal   (Followers: 9, SJR: 1.424, CiteScore: 4)
Applicable Algebra in Engineering, Communication and Computing     Hybrid Journal   (Followers: 2, SJR: 0.294, CiteScore: 1)
Applications of Mathematics     Hybrid Journal   (Followers: 3, SJR: 0.602, CiteScore: 1)
Applied Biochemistry and Biotechnology     Hybrid Journal   (Followers: 44, SJR: 0.571, CiteScore: 2)
Applied Biochemistry and Microbiology     Hybrid Journal   (Followers: 18, SJR: 0.21, CiteScore: 1)
Applied Categorical Structures     Hybrid Journal   (Followers: 4, SJR: 0.49, CiteScore: 0)
Applied Composite Materials     Hybrid Journal   (Followers: 51, SJR: 0.58, CiteScore: 2)
Applied Entomology and Zoology     Partially Free   (Followers: 6, SJR: 0.422, CiteScore: 1)
Applied Geomatics     Hybrid Journal   (Followers: 3, SJR: 0.733, CiteScore: 3)
Applied Geophysics     Hybrid Journal   (Followers: 9, SJR: 0.488, CiteScore: 1)
Applied Intelligence     Hybrid Journal   (Followers: 15, SJR: 0.6, CiteScore: 2)
Applied Magnetic Resonance     Hybrid Journal   (Followers: 4, SJR: 0.319, CiteScore: 1)
Applied Mathematics & Optimization     Hybrid Journal   (Followers: 9, SJR: 0.886, CiteScore: 1)
Applied Mathematics - A J. of Chinese Universities     Hybrid Journal   (Followers: 1, SJR: 0.17, CiteScore: 0)
Applied Mathematics and Mechanics     Hybrid Journal   (Followers: 5, SJR: 0.461, CiteScore: 1)
Applied Microbiology and Biotechnology     Hybrid Journal   (Followers: 66, SJR: 1.182, CiteScore: 4)
Applied Physics A     Hybrid Journal   (Followers: 10, SJR: 0.481, CiteScore: 2)
Applied Physics B: Lasers and Optics     Hybrid Journal   (Followers: 26, SJR: 0.74, CiteScore: 2)
Applied Psychophysiology and Biofeedback     Hybrid Journal   (Followers: 8, SJR: 0.519, CiteScore: 2)
Applied Research in Quality of Life     Hybrid Journal   (Followers: 12, SJR: 0.316, CiteScore: 1)
Applied Solar Energy     Hybrid Journal   (Followers: 22, SJR: 0.225, CiteScore: 0)
Applied Spatial Analysis and Policy     Hybrid Journal   (Followers: 7, SJR: 0.542, CiteScore: 1)
Aquaculture Intl.     Hybrid Journal   (Followers: 26, SJR: 0.591, CiteScore: 2)
Aquarium Sciences and Conservation     Hybrid Journal   (Followers: 2)
Aquatic Ecology     Hybrid Journal   (Followers: 38, SJR: 0.656, CiteScore: 2)
Aquatic Geochemistry     Hybrid Journal   (Followers: 4, SJR: 0.591, CiteScore: 1)
Aquatic Sciences     Hybrid Journal   (Followers: 14, SJR: 1.109, CiteScore: 3)
Arabian J. for Science and Engineering     Hybrid Journal   (Followers: 5, SJR: 0.303, CiteScore: 1)
Arabian J. of Geosciences     Hybrid Journal   (Followers: 2, SJR: 0.319, CiteScore: 1)
Archaeological and Anthropological Sciences     Hybrid Journal   (Followers: 21, SJR: 1.052, CiteScore: 2)
Archaeologies     Hybrid Journal   (Followers: 12, SJR: 0.224, CiteScore: 0)
Archiv der Mathematik     Hybrid Journal   (Followers: 1, SJR: 0.725, CiteScore: 1)
Archival Science     Hybrid Journal   (Followers: 68, SJR: 0.745, CiteScore: 2)
Archive for History of Exact Sciences     Hybrid Journal   (Followers: 7, SJR: 0.186, CiteScore: 1)
Archive for Mathematical Logic     Hybrid Journal   (Followers: 3, SJR: 0.909, CiteScore: 1)
Archive for Rational Mechanics and Analysis     Hybrid Journal   (SJR: 3.93, CiteScore: 3)
Archive of Applied Mechanics     Hybrid Journal   (Followers: 6, SJR: 0.79, CiteScore: 2)
Archives and Museum Informatics     Hybrid Journal   (Followers: 158, SJR: 0.101, CiteScore: 0)
Archives of Computational Methods in Engineering     Hybrid Journal   (Followers: 6, SJR: 1.41, CiteScore: 5)
Archives of Dermatological Research     Hybrid Journal   (Followers: 7, SJR: 1.006, CiteScore: 2)
Archives of Environmental Contamination and Toxicology     Hybrid Journal   (Followers: 14, SJR: 0.773, CiteScore: 2)
Archives of Gynecology and Obstetrics     Hybrid Journal   (Followers: 17, SJR: 0.956, CiteScore: 2)
Archives of Microbiology     Hybrid Journal   (Followers: 9, SJR: 0.644, CiteScore: 2)
Archives of Orthopaedic and Trauma Surgery     Hybrid Journal   (Followers: 9, SJR: 1.146, CiteScore: 2)
Archives of Osteoporosis     Hybrid Journal   (Followers: 2, SJR: 0.71, CiteScore: 2)
Archives of Sexual Behavior     Hybrid Journal   (Followers: 10, SJR: 1.493, CiteScore: 3)
Archives of Toxicology     Hybrid Journal   (Followers: 17, SJR: 1.541, CiteScore: 5)
Archives of Virology     Hybrid Journal   (Followers: 5, SJR: 0.973, CiteScore: 2)
Archives of Women's Mental Health     Hybrid Journal   (Followers: 17, SJR: 1.274, CiteScore: 3)
Archivio di Ortopedia e Reumatologia     Hybrid Journal  
Archivum Immunologiae et Therapiae Experimentalis     Hybrid Journal   (Followers: 2, SJR: 0.946, CiteScore: 3)
ArgoSpine News & J.     Hybrid Journal  
Argumentation     Hybrid Journal   (Followers: 6, SJR: 0.349, CiteScore: 1)
Arid Ecosystems     Hybrid Journal   (Followers: 2, SJR: 0.2, CiteScore: 0)
Arkiv för Matematik     Hybrid Journal   (Followers: 2, SJR: 0.766, CiteScore: 1)
Arnold Mathematical J.     Hybrid Journal   (Followers: 1, SJR: 0.355, CiteScore: 0)
Arthropod-Plant Interactions     Hybrid Journal   (Followers: 2, SJR: 0.839, CiteScore: 2)
Arthroskopie     Hybrid Journal   (Followers: 1, SJR: 0.131, CiteScore: 0)
Artificial Intelligence and Law     Hybrid Journal   (Followers: 11, SJR: 0.937, CiteScore: 2)
Artificial Intelligence Review     Hybrid Journal   (Followers: 18, SJR: 0.833, CiteScore: 4)
Artificial Life and Robotics     Hybrid Journal   (Followers: 10, SJR: 0.226, CiteScore: 0)
Asia Europe J.     Hybrid Journal   (Followers: 4, SJR: 0.504, CiteScore: 1)
Asia Pacific Education Review     Hybrid Journal   (Followers: 12, SJR: 0.479, CiteScore: 1)
Asia Pacific J. of Management     Hybrid Journal   (Followers: 16, SJR: 1.185, CiteScore: 2)
Asia-Pacific Education Researcher     Hybrid Journal   (Followers: 13, SJR: 0.353, CiteScore: 1)
Asia-Pacific Financial Markets     Hybrid Journal   (Followers: 3, SJR: 0.187, CiteScore: 0)
Asia-Pacific J. of Atmospheric Sciences     Hybrid Journal   (Followers: 19, SJR: 0.855, CiteScore: 1)
Asian Business & Management     Hybrid Journal   (Followers: 9, SJR: 0.378, CiteScore: 1)
Asian J. of Business Ethics     Hybrid Journal   (Followers: 11)
Asian J. of Criminology     Hybrid Journal   (Followers: 6, SJR: 0.543, CiteScore: 1)
AStA Advances in Statistical Analysis     Hybrid Journal   (Followers: 4, SJR: 0.548, CiteScore: 1)
AStA Wirtschafts- und Sozialstatistisches Archiv     Hybrid Journal   (Followers: 5, SJR: 0.183, CiteScore: 0)
ästhetische dermatologie & kosmetologie     Full-text available via subscription  
Astronomy and Astrophysics Review     Hybrid Journal   (Followers: 22, SJR: 3.385, CiteScore: 5)

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Similar Journals
Journal Cover
Agricultural Research
Journal Prestige (SJR): 0.276
Citation Impact (citeScore): 1
Number of Followers: 6  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 2249-720X - ISSN (Online) 2249-7218
Published by Springer-Verlag Homepage  [2351 journals]
  • Effect of High-Temperature Stress on Ascorbate–Glutathione Cycle in
           Maize
    • Abstract: High-temperature stress induces cellular changes leading to over-production of highly reactive oxygen species (ROS) which damage macromolecules and cell organelles, eventually resulting in cell death. Antioxidative metabolism in plants comprising of enzymatic and non-enzymatic antioxidants imparts tolerance by scavenging or detoxification of excess ROS. We investigated the response of major H2O2-detoxifying system, the AsA–GSH cycle in four genotypes of maize differing in heat sensitivity. Stress was imposed by staggered sowing so that one set of plants faced high-temperature stress at their anthesis-silking stage. The concentrations of H2O2 increased across the genotypes by high temperature; however, the increase was lesser in tolerant genotypes: NSJ 189 and NSJ 221. High-temperature stress led to an increase in the level of GSH and GSSG in all the genotypes, whereas GSH/GSSG decreased in sensitive genotypes: PSRJ 13099 and RJR 270. The glutathione S-transferase activity increased significantly under heat stress. APX, MDHAR and DHAR activities decreased under heat stress in the sensitive group. Under high temperature, GR activity remained unchanged in sensitive genotypes, while it increased significantly in tolerant genotypes. Ascorbate levels increased in tolerant genotypes, while a decline was observed in sensitive genotypes. Isoforms of APX showed some new bands in tolerant genotypes as well as higher intensity of the existing ones as compared to sensitive genotypes under stress conditions. Isoforms of GR did not show any genotypic differences under heat stress. Findings emphasized the importance and complexity of the AsA–GSH system in fine-tuning the redox metabolism under heat stress in maize. The study also suggested that the antioxidative enzymes of AsA–GSH cycle play a key role in sustaining the ROS homeostasis in cells, thus minimizing the potential toxic effects of ROS.
      PubDate: 2019-07-04
       
  • Evaluating Economic Viability of Large Fish Solar Tent Dryers
    • Abstract: Effectiveness of solar tent dryers in agricultural products has been well documented, but this information may not be generalised for use of solar dryers in all agricultural commodities and for all sizes of solar dryers. As such, we evaluated the economic viability of large capital intensive solar dryer that has been designed to dry small fish species on commercial basis on Lake Malawi. A probabilistic net present value (NPV) analysis was applied to a 15-m-long by 8-m-wide solar tent dryer which costs MK1,513,850 (US$2100) to construct and has a maximum carrying capacity 850 kg of fresh fish. The results show that the base NPV of this solar tent dryer is MWK5, 838,482.11 (US$11,762). When risk and uncertainty are considered, the probabilistic NPV becomes MWK12, 268,503 (US$24,716). The probability of obtaining a positive NPV was 58%, and we found that NPV is highly sensitive to total revenue and total cost but not to their components. We conclude that investments in large solar tent dryers are economically viable and that viability would be enhanced through access to formal fish markets where prices are stable and high.
      PubDate: 2019-06-06
       
  • Characterization of Rhizoctonia Species Complex Associated with Rice
           Sheath Disease in Karnataka
    • Abstract: Sheath disease of rice is a complex biotic stress, caused by Rhizoctonia solani (sheath blight), R. oryzae (sheath spot) and R. oryzae-sativae (aggregate sheath spot). To determine the extent of distribution of these pathogen species, eighteen isolates of Rhizoctonia spp. were collected from different rice growing agroclimatic zones of Karnataka, India. Causal organisms were isolated from the diseased samples and identified based on morphological and molecular tools. Mycelial characters and sclerotial morphology were considered for species differentiation at culture level. Later, species identity was confirmed through polymerase chain reactions using previously standardized Rhizoctonia species-specific primers. Out of eighteen isolates, 14 isolates characterized as R. solani, two as R. oryzae and remaining two as R. oryzae-sativae. The results indicated that all three species of Rhizoctonia, viz. R. solani, R. oryzae and R. oryzae-sativae, are involved in causing rice sheath disease in Karnataka and R. solani was found predominantly distributed. Though sheath diseases caused by R. oryzae and R. oryzae-sativae are regarded as minor, their complementary role with R. solani in causing severe sheath disease epidemics has to be investigated. Accuracy in distinguishing these pathogens is essential to ensure the success of breeding programmes, which aim to develop rice varieties with resistance to sheath disease complex. As per the information available, this is the first report on the distribution of three species of Rhizoctonia associated with rice sheath disease in Karnataka.
      PubDate: 2019-06-01
       
  • Analysis of Influence Factors on the Sieving Efficiency in Tea Vibration
           Sieving
    • Abstract: During the process of tea vibration sieving, the instability of tea flow has great influence on the sieving efficiency, which contains the sieving quality and sieving productivity. In this paper, the influence factors on the sieving efficiency in tea vibration sieving were studied. Firstly, the mechanism analysis of tea vibration sieving was conducted. Through the force and motion analysis of the tea particles, the sieving model of the stripe-shape tea particles was established to study the influence of vibration angle, rotation speed and acceleration in the sieving rate. Next, the tea vibration sieving process was simulated by the Matlab/Simulink to analyze the relationship between tea flow rate, rotation speed of tea vibration sieving machine and sieving efficiency. Finally, the theoretical analysis results were well verified by the experiments. The research results provide a certain theoretical foundation for designing and improving the tea vibration sieving machine, and can be used to guide the optimization of operation parameters.
      PubDate: 2019-06-01
       
  • Impact of Extreme Weather Events on Wheat Yield in Different
           Agro-Ecological Zones of Middle Indo-Gangetic Plain
    • Abstract: The long period meteorological data of maximum temperature, minimum temperature and rainfall of Pusa, Purnia, Sabour and Patna stations representing different agro-ecological zone of middle Indo-Gangetic plain for the period (44–58 years) were analysed for trend analysis of temperature and rainfall for rabi season and heat waves, cold waves and extreme rainfall events for the whole year. The Theil–Sen’s slope and Mann–Kendall test were used to investigate the trends in climate variability (maximum and minimum temperature, rainfall) and extreme weather events (heat waves, cold waves and extreme rainfall). The maximum temperature had significant decreasing trend in Rabi season at Sabour. The minimum temperature had a significant increasing trend at all the stations in Rabi season. At Pusa, rainfall had a significant decreasing trend. Significant decreasing trend in heat waves at Pusa and Sabour stations were found. In this study, an attempt was made to assess the impact of these parameters on the productivity of wheat crop in Bihar. For this purpose, CROPSIM-Wheat model 4.6 was used to assess the change in wheat yield under different climate change scenarios for four locations viz. Pusa (zone I), Purnia (zone II), Sabour (zone III A) and Patna (zone III B) in Bihar. The model was run for the scenarios like increase in maximum temperature and minimum temperature with 1 °C, 2 °C and 3 °C separately and 1 °C, 2 °C, 3 °C, 4 °C increase in mean temperature keeping all parameters normal on wheat yield. Simulated wheat productivity revealed the reduction in grain yield by 7.4–10.4%, 15.3–21.2%, 21.6–30.9% and 26.9–38.6% in response to temperature rise by 1 °C, 2 °C, 3 °C and 4 °C, respectively, from baseline yield (1980–2010) at different locations. Warming temperature and greater incidence and intensity of extreme weather events due to climate change may significantly affect crop yield.
      PubDate: 2019-06-01
       
  • Stability Analysis in Tomato Inbreds and Their F 1 s for Yield and Quality
           Traits
    • Abstract: The primary aim of plant breeding is to improve stability in yield and to obtain varieties with good quality. For this reason, a study of 43 tomato genotypes (30 F1s and 13 lines) was evaluated for yield and its components for four seasons from 2010 to 2012. In each seasons, the experiment was conducted in randomized block design with three replications. Genotype × environment (G × E) interactions were significant for all the characters under study. The effects of cultivars, environment, and genotype × environment interactions were evaluated. One cross-combination (Pant T-3 × Azad T-5) was found to be responsive while eight crosses (H-24 × Kashi Sharad, CO-3 × Floradade, CO-3 × Kashi Sharad, CO-3 × Azad T-5, Punjab Upma × Azad T-5, Pant T-3 × Kashi Sharad, Kashi Amrit × Kashi Sharad and H-24 × Azad T-5) were suitable to be recommended for wide cultivation in all the four seasons.
      PubDate: 2019-06-01
       
  • Antioxidant Potentiality and Mineral Content of Summer Season Leafy
           Greens: Comparison at Mature and Microgreen Stages Using Chemometric
    • Abstract: Nine summer season leafy greens viz., Amaranthus, bottle gourd, cucumber, jute, palak, poi, pumpkin, radish, water spinach, were evaluated for their antioxidants and mineral content at microgreen and mature stages. Among the antioxidants, total phenolics, total flavonoids, and ascorbic acid were quantified. Besides, antioxidant activities of the leafy vegetables were also measured using four in vitro assays viz., ferric reducing antioxidant power (FRAP), cupric reducing antioxidant power (CUPRAC), 2,2-diphenyl-1-picrylhydrazyl (DPPH), and Trolox equivalent antioxidant capacity assays (TEAC). In addition to this, the content of selected elements such as potassium (K), iron (Fe), manganese (Mn), zinc (Zn), and copper (Cu) was estimated. A wide variation was observed in the content of antioxidants and minerals. Variation was also observed for cultivar to cultivar as in case of Amaranthus. Results showed that the total phenolic content varied from 95.73 to 313.92 mg Gallic acid equivalent (GAE)/100 g in the mature vegetables, whereas the value varied from 25.00 to 152.10 mg GAE/100 g in microgreens. In fact, mature leafy vegetables were found to be significantly higher sources for total phenolics than microgreens. Likewise, a similar trend was observed for total flavonoids content and antioxidant activities. On the contrary, in all the species the concentration of K and Zn was significantly higher in microgreens than mature vegetables. However, no specific trend was observed in case of Fe, Cu, and Mn content. Based on antioxidant potentiality and mineral content, these leafy greens formed three distinct clusters; the first cluster represented by Amaranthus cv Local Green, jute, bottle gourd, and water spinach at mature stages. Jute was found to be the best, followed by bottle gourd, Amaranthus cv. Local Green, and water spinach.
      PubDate: 2019-06-01
       
  • Statistical Analysis of Grain Yield in Iranian Cultivars of Barley (
           Hordeum vulgare )
    • Abstract: To determine the most important traits influencing grain yield of barley, 10 cultivars were evaluated in three field experiments in randomized block design with three replicates during 2013–2014 growing season. In each experiment, 10 yield component traits were evaluated. Following a combined analysis of variance, multivariate statistical analyses such as simple correlation coefficients, factor analysis, stepwise analysis, path analysis and cluster analysis were administered on combined means. The correlation coefficient analysis showed significant positive correlation of grain yield with grain filling period, biological yield, harvest index, number of seed/spike, number of seed/m2, 1000-seed weight and number of spikes/m2. Factor analysis divided the 11 measured variables into five factors. Factor 1 was affected by grain yield and grain filling period. Factor 2 was affected by number of spikes/m2 and number of seed. Factor 3 was associated with days to hardening and days to maturity. Factor 4 was influenced by number of seed/spike, number of spikes/m2 and 1000-seed weight. Fifth factor was strongly affected by biological yield and plant height. In stepwise regression analysis for grain yield as independent variable, two traits include biological yield and harvest index entered to regression model in four steps with R-square = 0.98. Regression coefficient of both entered variables was positive and significant at 1% probability level. The path coefficient analysis based on grain yield, as a dependent variable, implicated that biological yield had the highest positive direct effect on grain yield. Highest positive indirect effect on grain yield was related to harvest index through biological yield. Cluster analysis using Ward’s method divide 10 investigated cultivars into three clusters. Cluster 1 specified to cultivars with the highest plant height, number of seed/spike and 1000-seed weight. Cluster 2 was specified to lines with higher amount of grain yield, biological yield and number of seeds/m2. Two control cultivars include Sina and Nosrat were located to cluster 3. Finally, based on GGE biplot analysis, Sina, which has higher yield and more relative stability, can be suggested as superior than the other cultivars.
      PubDate: 2019-06-01
       
  • Spatial Variability Analysis of Soil Properties of Tinsukia District,
           Assam, India
    • Abstract: Accurate analysis of spatial variability of soil properties is a key component of the agriculture ecosystem and environment modelling. A systematic study was carried out to explore the spatial variability of pH, organic carbon (OC), available nitrogen (AN), available phosphorus (AP) and available potassium (AK) in soils of Tinsukia district, Assam, India, for site-specific soil management. For this, a total of 3062 soil samples from a 0–25 cm depth (plough layer) at an approximate interval of 1 km were collected and analysed for different physical and chemical properties. Data were analysed both statistically and geostatistically on the basis of semivariogram. The values of soil pH, and OC, AN, AP and AK varied from 3.4 to 8.2, and 0.2–43.4, 1.1–37.3 and 12.5–392.8 mg/kg, respectively, with mean values of 4.6, and 13.8, 9.6 and 98.4 mg/kg, respectively. The largest variability in the soil properties was observed for K (55%), whereas the least variability was found for pH (14%). The semivariogram for pH, OC, AN, and AP was best fitted by the exponential model, whereas AK was best fitted by the Gaussian model. The range of all soil properties varied from 1119 to 3663 m; thus the length of the spatial autocorrelation is much longer than the sampling interval of 1000 m. Therefore, the current sampling design was appropriate for this study. The nugget/sill ratio indicated a moderate spatial dependence for pH, OC, N and P (33–73%) and a weak spatial dependence for K (82%). The generated spatial distribution maps can serve as an effective tool in site specific nutrient management. This is a prerequisite in farming systems in order to optimize the cost of cultivation as well as to address nutrient deficiency. The study also helped to identify and delineate critical nutrient deficiency zones.
      PubDate: 2019-06-01
       
  • Evaluation of Interspecific Somatic Hybrids of Potato ( Solanum tuberosum
           ) and Wild S. cardiophyllum for Adaptability, Tuber Dry Matter, Keeping
           Quality and Late Blight Resistance
    • Abstract: Interspecific potato somatic hybrids (here after referred as ‘cph-hybrids’) derived earlier through protoplast fusion (Solanum tuberosum + S. cardiophyllum) were used in this study. The genetic potential of cph-hybrids was assessed based on the field performance in the Indian sub-tropical conditions. In general, cph-hybrids exhibited higher plant stand, poor plant vigour and late foliage maturity as compared to the control potato var. Kufri Bahar. Yield performance of cph-hybrids was poor as compared to the control, but produced 3–6 times higher marketable tuber yield than the wild parent (S. cardiophyllum). All cph-hybrids possessed significantly higher tuber dry matter content (≥ 24%) than the parents (20.82%) and var. Kufri Bahar (18.52%), excellent keeping quality and showed high resistance to late blight. Thus, based on this study the promising cph-hybrids viz., Crd 6, Crd 10 and Crd16, can be used as parents in breeding for the improvement of important traits viz., higher tuber dry matter content, better keeping quality and high late blight resistance, along with adaptability under sub-tropical conditions.
      PubDate: 2019-06-01
       
  • Assessment of the Consequences of Changing Cropping Pattern on Land and
           Water Productivity: A case study of Haryana State, India
    • Abstract: Management and improvement of land and water resources are indispensable for increasing agricultural productivity because of emerging problems such as declining groundwater table, and depletion of soil quality. Policy makers need an understanding of the emerging trend in land and water productivity in an area for proper planning. Scanning of literature revealed the lack of data in this regard. Hence, this study aimed to analyze the temporal trend in cropping pattern and its impact on the land and water productivity in Haryana state of India during 1967–2016. Area, production and yield data of the main crops of both kharif (monsoon) and rabi (winter) seasons were collected from the Department of Agriculture of Haryana. Land productivity, water productivity, aggregate land and aggregate water productivity were computed for the study area. The findings showed a rise in land and water productivity (in physical terms) of all crops in last 49 years, but the growth rate has gone down. Major decline was found in rice and wheat productivity. Aggregate land and water productivity (in monetary terms) has shown a positive trend, suggesting that the farmers are receiving more returns from per unit of land and water. However, from agronomic perspective, the emerging cropping pattern is not sustainable in the long run, especially rice crop. Thus, an increase in water productivity is required, as water is becoming a scarce resource in the area. The study would be helpful for managing the land and water resources for a sustainable cropping system.
      PubDate: 2019-06-01
       
  • Diversity, Species Richness and Foraging Behaviour of Pollinators in
           Cashew
    • Abstract: Insect visitors documented on cashew flowers during the present investigation include 40 species belonging to 13 families of three insect orders. The Hymenopterans were the major floral visitors comprising of bees, ants and wasps followed by dipterans. Among the 40 species recorded as flower visitors, only 13 are considered as pollinators of cashew, in which eight belong to Apidae and five belong to Halictidae. Among the two bee families, Apidae was the most abundant contributing 75.6% of the bee abundance. Within Apidae, the highest species abundance was recorded for Braunsapis picitarsus (20%) followed by Apis cerana indica (16.7%). Halictidae bees contributed to 24.4% of bee abundance, among which Pseudapis oxybeloides was most abundant (17.6%). Peak bee activity was recorded between 11.00 and 13.00 h for most of the bees. During 10.00–13.00 h, B. picitarsus was the most abundant (22–31%) followed by P. oxybeloides (18–25%), A. c. indica (12–15%), Ceratina sp. (8–13%) and A. florea (6–14%). Foraging rate was more for A. c. indica followed by B. picitarsus and A. florea. Lesser time was spent by A. c. indica for nectar and P. oxybeloides for pollen (i.e. 1–4 s), while longer time of 3–21, 8–16 and 5–11 s was spent by A. florea, B. picitarsus and Tetragonula sp., respectively. Bees of C. hieroglyphica, Lasioglossum sp. and Seledonia sp. spent 2–6 s per flower. Foraging rate was higher in A. c. indica and B. picitarsus, while foraging speed was lesser in A. c. indica and P. oxybeloides. Nesting sites of different bee species and the common bee flora in the study area were also recorded.
      PubDate: 2019-06-01
       
  • Variations in Soil Properties, Rhizome Yield and Quality as Influenced by
           Different Nutrient Management Schedules in Rainfed Ginger
    • Abstract: While there are numerous reports on nutrient management in ginger (Zingiber officinale Roscoe), a comprehensive study dealing with the simultaneous influence of different nutrient management schedules on ginger yield, rhizome quality, nutrient uptake (oleoresin, essential oil, essential oil constituents) and soil properties (physico-chemical and biochemical) is found wanting. Hence, field experiments were conducted between 2007 and 2016 involving (1) organic nutrient management (ONM) consisting of exclusive use of biological fertilizers, viz. Bacillus megaterium, Azospirillum lipoferum, farmyard manure, vermicompost, neem cake and ash, (2) chemical nutrient management (CNM) consisting of only inorganic sources of nutrients, viz. nitrogen, phosphorus and potassium applied @ 75–50–50 kg ha−1 in the form of urea, rock phosphate and muriate of potash, respectively, and (3) integrated nutrient management (INM) encompassing both organic sources and biological fertilizers, viz. FYM and N applied at 50% of CNM and P, K applied at 100% of CNM, i.e. 37.5–50–50 kg ha−1. The results on soil properties revealed that soil pH was lowest in CNM (5.03), while soil organic carbon (SOC) level was markedly higher by 39.0% in ONM and by 32.8% in INM compared with CNM. Bray P level was greater in ONM by 119.0% compared with CNM and by 72.0% compared with INM. Exchangeable Ca and Mg were greater in ONM and INM, and among available micronutrients, available Cu and Fe levels were greatest in ONM and available Mn level was greatest in CNM. Among the soil biochemical parameters, microbial biomass C increased markedly by 81.0% in ONM and 48.0% in INM. This was responsible for enhanced β-glucosidase, acid phosphatase and dehydrogenase activities in ONM and INM, though urease activity was greatest in CNM. In case of rhizome yield, CNM registered significantly lower yield (mean 11.14 Mg ha−1) in comparison with ONM and INM (mean 18.64 and 18.50 Mg ha−1, respectively) across all the years. With regard to rhizome quality, the essential oil content in ONM and CNM was almost identical (1.0–1.7%), while it was slightly higher at 1.32–4.0% in INM. Results on rhizome oil components showed that pinene, d-camphene and β-phellandrene contents were higher in CNM, β-citral (neral) and citronellol in ONM and α-citral (geranial) in INM. The study, in general, indicated the distinct possibility of reducing or avoiding application of chemical fertilizers while simultaneously sustaining ginger rhizome yield and quality through ONM or INM.
      PubDate: 2019-06-01
       
  • Adoption and Socio-economic Benefits of Improved Post-rainy Sorghum
           Production Technology
    • Abstract: Low remuneration and adoption of sorghum production technologies were among the major constraints for drastic reduction in its cultivation. Therefore, evaluation of production potential, adoption, economic and other benefits of the technologies in social perspectives of the farmers was felt essential. The study was conducted with 200 adopted farmers under field trials organized during 5 years from 2009–2010 to 2013–2014 in five districts in two prominent sorghum growing regions in Maharashtra State of India. The yield potential and merits were measured by following before and after method, and data were collected through semi-structured interview schedule. The performance of the demonstrated technologies resulted in increased adoption (27%), higher net returns (170%), followed by grain yield (58%) with better quality (78%) and fodder yield (26%), and found to be significantly positive over the pre-FLD. It enabled to motivate farmers and increase in area under sorghum by 29%. Furthermore, the additional returns helped them in spending significantly higher on purchase of household items (111%), followed by attending more social functions (109%), purchase of animals (91%), in start of new business (86%), deposit in bank (77%) and investment in farm development activities (62%).
      PubDate: 2019-06-01
       
  • Statistical Modelling of Seed Germination and Seedlings Root Response of
           Annual Ryegrass ( Lolium rigidum ) to Different Stress
    • Abstract: This study examines the role of various environmental factors, viz. salinity, water potential, alcohol, potassium nitrate, gibberellic acid, and root exudates of neighbouring Lolium angustifolius species on seed germination, and root growth of annual ryegrass (L. rigidum). According to a statistical model, a total of 20% seed was germinated at 100 mM of sodium chloride solutions suggesting that the species is moderate to high levels of salinity tolerant. Moderate to high levels of water stress did not inhibit seed germination of L. rigidum, and 15% seeds still germinated at − 8 MPa water. Germination process of non-germinated seeds due to salt stress was not accelerated by gibberellic acid, but about 30% seed germination was increased by 0.02 M potassium nitrate treatment. The hormesis model suggests that concentrations of potassium nitrate more than 0.04 had no effect to enhance seed germination. Seeds of L. rigidum were successfully germinated under a temperature range between 10 and 30 °C. A separate laboratory experiment determined that germination was not affected by root exudates of L. angustifolius but had a significant effect on seedling roots of L. rigidum, where density by variety had a major effect on the root growth of L. rigidum. At 20 seedlings of L. angustifolius, about 80% root growth of L. rigidum was controlled and 60% roots of L. rigidum showed bent or curved growth. These results showed that L. rigidum may possess a wide range adaptive mechanism to different environmental stress.
      PubDate: 2019-06-01
       
  • Quantitative and Qualitative Aspects of Soluble and Ionically Wall-Bound
           Peroxidases of EMS-Mutagenized Durum Wheat Lines ( Triticum durum ), as
           Tested for Yield at Drought Conditions
    • Abstract: In order to characterize the response to drought of 19 ethyl methanesulfonate (EMS)-mutagenized lines of durum wheat (Triticum durum Desf.) derived from the variety CHAM-1 and cultivated in Morocco, growth (plant height, PLH) and yield (grain number per spike, GNS) parameters were followed for different lines and CHAM-1 variety. All were cultivated under well-watered (C) and drought conditions (T). In parallel, quantitative and qualitative aspects of leaf peroxidases (EC 1.11.1.7) were analyzed. When compared with C plant lines, the corresponding T lines showed decreases of 9–38% and 1–78%, respectively, for PLH and GNS parameters. A positive correlation was found between PLH and the yield as GNS (r2 = 0.885). When expressed as units mg−1 proteins, soluble peroxidases (SPOX) were less represented than the ionically wall-bound peroxidases (IPOX) in all mutagenized wheat lines, with 22.1% and 46.2% as respective coefficients of variation for drought-stressed lines. Drought-induced reduction in grain yields for all lines correlated positively with percentages of IPOX exhibited by stressed plants (r2 = 0.68). In addition, Averages of drought-induced decreases in GNS, calculated for five groups of mutagenized lines, were found to be positively correlated with their respective percentages of IPOX (r2 = 0.906). Drought-adapted lines showed decreases in IPOX. When subjected to electrophoresis using 6–15% polyacrylamide gradient gels, resolved IPOX of cereal line groups of limited drought-induced reduction in GNS exhibited low reactivity on native gels. These data support the hypothesis that IPOX are indicators of the sensitivity of wheat lines to drought conditions. Possible mechanisms of POX involvement in wheat resistance to drought and developing appropriate biochemical tests to screen variability and drought adaptation of EMS mutants are discussed in this study.
      PubDate: 2019-06-01
       
  • Performance Evaluation of AquaCrop and DSSAT-CERES for Maize Under
           Different Irrigation and Manure Application Rates in the Himalayan Region
           of India
    • Abstract: The agricultural modeling sector faces a lot of challenges when it comes to the evaluation of “what if” scenarios due to the immense data requirement of common models specially the crop coefficients which are not usually available for all varieties. The present study assesses the performance of two commonly used crop models: AquaCrop (less data requiring model) and DSSAT-CERES (data-intensive model) for Maize (Zea mays) at higher Himalayan region of India. Model calibration and validation were done based on the combination of different irrigation and farmyard manure application rates. Furthermore, model comparison was done post-validation with field experimental data by comparing grain yield, total biomass yield, harvest index, total soil water content and leaf area index (LAI). Both AquaCrop and DSSAT-CERES underestimated yield by 1.0 and 0.2%, respectively. The corresponding models underestimated total aboveground biomass by 0.15 and 1.7%; however, DSSAT-CERES overestimated LAI by 0.5%, whereas AquaCrop underestimated by 0.1%. Statistical tests for all the output variables indicate insignificant variation among the simulated and observed values. Results suggest that both AquaCrop and DSSAT-CERES are suitable for higher altitudes in the Himalayan region of India. However, AquaCrop being parsimonious with relatively incomparable results to DSSAT-CERES and low data requirement is recommended.
      PubDate: 2019-06-01
       
  • Influence of Photoperiod and EDTA Salts on Endogenous Gibberellic Acid
           Concentration of Tissue Culture Grown Potato Microplants
    • Abstract: Kufri Bahar, a leading potato variety is facing a problem of deshaped elongated tubers. Deshaping of tubers in form of elongation with jelly end formation leads to spoilage during transportation and storage. This elongation may be due to the stress conditions and/or enhanced gibberellic acid (GA) formation during micropropagation. Photoperiod and EDTA salts are reported to influence the GA concentration. Therefore, the effect of photoperiod and EDTA salts was investigated on the endogenous GA concentration of tissue culture microplants of potato vars Kufri Bahar and Kufri Lauvkar. The GA concentration in microplants grown in tissue culture media with Na-EDTA, Fe-EDTA and without EDTA ranged from 0.84 to 1.95 nmol/ml FW (fresh weight). In the present study, no correlation was observed between EDTA and GA concentration. Shoot length, internodal distance and number of nodes were more in microplants grown under a long photoperiod (16 h). Root length, number of roots and the number of leaves were high in short photoperiod (12 h) grown microplants. Gibberellic acid content showed similar trend as that of shoot length and ranged from 0.65 to 1.49 nmol/ml. Concentration of GA was more in var. Kufri Bahar compared to var. Kufri Lauvkar under the long photoperiod, which showed that Kufri Bahar is more responsive to photoperiod. High GA content in var. Kufri Bahar microplants grown under the long photoperiod could be the possible reason for tuber elongation. Therefore, to avoid the deshaping of tubers, the photoperiod during in vitro propagation may be shortened, particularly for var. Kufri Bahar.
      PubDate: 2019-06-01
       
  • Induction of Chitinase and Brown Spot Disease Resistance by Oligochitosan
           and Nanosilica–Oligochitosan in Dragon Fruit Plants
    • Abstract: The brown spot disease caused by Neoscytalidium dimidiatum fungus on dragon fruit plants (Hylocereus undatus) is an extremely serious disease. Oligochitosan (OC) and nanosilica (nSiO2) have been considered as effective plant elicitors. In this study, OC with Mw of 3000, 5000, and 7000 g/mol was prepared by γ-irradiation and nSiO2 with size ~ 45 nm was synthesized from rice husk. Mixture of nSiO2–OC was prepared by dispersing nSiO2 in OC solution. The resistant effect against brown spot disease on dragon fruit plants was assessed by measuring the induced chitinase enzyme activity and the disease severity after spraying OC, nSiO2–OC and inoculating fungus. The results showed that all OC enhanced chitinase induction and reduced disease severity compared with control, and the OC ~ 3000 g/mol exhibited the highest activity. The nSiO2–OC also exhibited similar effect as OC and nSiO2, but it was more effective than individual OC or nSiO2 from 120 h onward.
      PubDate: 2019-06-01
       
  • Evaluation of Soil Fertility in a Gravel-Sand-Mulched Jujube ( Ziziphus
           jujuba ) Orchard Based on Modified Nemoro Fertility Indexing Method
    • Abstract: An effective evaluation of soil fertility can provide a theoretical basis for managing quality and strategies of fertilization for soil. Based on 32 m × 32 m grid sampling, the soil organic matter, total N, total P, total K, available K, available P, salinity and soil pH were used as the soil fertility evaluation factors. And we integrated evaluation of the soil fertility using classical statistics, geostatistics and modified Nemoro fertility index. The result shows that the mean value of pH was 8.89 which showed alkalinity. The CV for organic matter, total N, total K, pH and available K were low variation. Others (total P, available P and salinity) were moderate variation. The nugget variances for organic matter and total were strong spatial autocorrelation. Others were between 0.418 and 0.5, indicating moderate spatial autocorrelation. The spatial distribution of each fertility index was not obvious. The Ps was within the range of 0.63–0.80, all fertility indicators surrounding graphics areas were small in Radar map, indicating the fertility level was classified as barren. The mean fertility index, Pi, of the soil was in the order: available K > salinity > total K > available P > pH > total P > organic matter > total N. The soil organic matter and total N were the main limiting factors restraining soil fertility. The spatial distribution patterns of soil index and Ps were complicated and had no regularity with patch distribution at field scale. The methods of increasing organic fertilizers, crop rotation and fallow were practicable and necessary for soil fertilizing management, increasing yields and improving crop quality.
      PubDate: 2019-05-27
       
 
 
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