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Publisher: Elsevier   (Total: 3163 journals)

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Showing 1 - 200 of 3163 Journals sorted alphabetically
A Practical Logic of Cognitive Systems     Full-text available via subscription   (Followers: 9)
AASRI Procedia     Open Access   (Followers: 14)
Academic Pediatrics     Hybrid Journal   (Followers: 30, SJR: 1.655, CiteScore: 2)
Academic Radiology     Hybrid Journal   (Followers: 22, SJR: 1.015, CiteScore: 2)
Accident Analysis & Prevention     Partially Free   (Followers: 88, SJR: 1.462, CiteScore: 3)
Accounting Forum     Hybrid Journal   (Followers: 25, SJR: 0.932, CiteScore: 2)
Accounting, Organizations and Society     Hybrid Journal   (Followers: 35, SJR: 1.771, CiteScore: 3)
Achievements in the Life Sciences     Open Access   (Followers: 5)
Acta Anaesthesiologica Taiwanica     Open Access   (Followers: 7)
Acta Astronautica     Hybrid Journal   (Followers: 394, SJR: 0.758, CiteScore: 2)
Acta Automatica Sinica     Full-text available via subscription   (Followers: 2)
Acta Biomaterialia     Hybrid Journal   (Followers: 27, SJR: 1.967, CiteScore: 7)
Acta Colombiana de Cuidado Intensivo     Full-text available via subscription   (Followers: 2)
Acta de Investigación Psicológica     Open Access   (Followers: 3)
Acta Ecologica Sinica     Open Access   (Followers: 8, SJR: 0.18, CiteScore: 1)
Acta Haematologica Polonica     Free   (Followers: 1, SJR: 0.128, CiteScore: 0)
Acta Histochemica     Hybrid Journal   (Followers: 3, SJR: 0.661, CiteScore: 2)
Acta Materialia     Hybrid Journal   (Followers: 244, SJR: 3.263, CiteScore: 6)
Acta Mathematica Scientia     Full-text available via subscription   (Followers: 5, SJR: 0.504, CiteScore: 1)
Acta Mechanica Solida Sinica     Full-text available via subscription   (Followers: 9, SJR: 0.542, CiteScore: 1)
Acta Oecologica     Hybrid Journal   (Followers: 10, SJR: 0.834, CiteScore: 2)
Acta Otorrinolaringologica (English Edition)     Full-text available via subscription  
Acta Otorrinolaringológica Española     Full-text available via subscription   (Followers: 2, SJR: 0.307, CiteScore: 0)
Acta Pharmaceutica Sinica B     Open Access   (Followers: 1, SJR: 1.793, CiteScore: 6)
Acta Poética     Open Access   (Followers: 4, SJR: 0.101, CiteScore: 0)
Acta Psychologica     Hybrid Journal   (Followers: 27, SJR: 1.331, CiteScore: 2)
Acta Sociológica     Open Access  
Acta Tropica     Hybrid Journal   (Followers: 6, SJR: 1.052, CiteScore: 2)
Acta Urológica Portuguesa     Open Access  
Actas Dermo-Sifiliograficas     Full-text available via subscription   (Followers: 3, SJR: 0.374, CiteScore: 1)
Actas Dermo-Sifiliográficas (English Edition)     Full-text available via subscription   (Followers: 2)
Actas Urológicas Españolas     Full-text available via subscription   (Followers: 3, SJR: 0.344, CiteScore: 1)
Actas Urológicas Españolas (English Edition)     Full-text available via subscription   (Followers: 1)
Actualites Pharmaceutiques     Full-text available via subscription   (Followers: 6, SJR: 0.19, CiteScore: 0)
Actualites Pharmaceutiques Hospitalieres     Full-text available via subscription   (Followers: 3)
Acupuncture and Related Therapies     Hybrid Journal   (Followers: 6)
Acute Pain     Full-text available via subscription   (Followers: 15, SJR: 2.671, CiteScore: 5)
Ad Hoc Networks     Hybrid Journal   (Followers: 11, SJR: 0.53, CiteScore: 4)
Addictive Behaviors     Hybrid Journal   (Followers: 16, SJR: 1.29, CiteScore: 3)
Addictive Behaviors Reports     Open Access   (Followers: 8, SJR: 0.755, CiteScore: 2)
Additive Manufacturing     Hybrid Journal   (Followers: 9, SJR: 2.611, CiteScore: 8)
Additives for Polymers     Full-text available via subscription   (Followers: 22)
Advanced Cement Based Materials     Full-text available via subscription   (Followers: 3, SJR: 0.732, CiteScore: 3)
Advanced Drug Delivery Reviews     Hybrid Journal   (Followers: 134, SJR: 4.09, CiteScore: 13)
Advanced Engineering Informatics     Hybrid Journal   (Followers: 11, SJR: 1.167, CiteScore: 4)
Advanced Powder Technology     Hybrid Journal   (Followers: 16, SJR: 0.694, CiteScore: 3)
Advances in Accounting     Hybrid Journal   (Followers: 8, SJR: 0.277, CiteScore: 1)
Advances in Agronomy     Full-text available via subscription   (Followers: 12, SJR: 2.384, CiteScore: 5)
Advances in Anesthesia     Full-text available via subscription   (Followers: 28, SJR: 0.126, CiteScore: 0)
Advances in Antiviral Drug Design     Full-text available via subscription   (Followers: 2)
Advances in Applied Mathematics     Full-text available via subscription   (Followers: 10, SJR: 0.992, CiteScore: 1)
Advances in Applied Mechanics     Full-text available via subscription   (Followers: 10, SJR: 1.551, CiteScore: 4)
Advances in Applied Microbiology     Full-text available via subscription   (Followers: 22, SJR: 2.089, CiteScore: 5)
Advances In Atomic, Molecular, and Optical Physics     Full-text available via subscription   (Followers: 14, SJR: 0.572, CiteScore: 2)
Advances in Biological Regulation     Hybrid Journal   (Followers: 4, SJR: 2.61, CiteScore: 7)
Advances in Botanical Research     Full-text available via subscription   (Followers: 2, SJR: 0.686, CiteScore: 2)
Advances in Cancer Research     Full-text available via subscription   (Followers: 29, SJR: 3.043, CiteScore: 6)
Advances in Carbohydrate Chemistry and Biochemistry     Full-text available via subscription   (Followers: 7, SJR: 1.453, CiteScore: 2)
Advances in Catalysis     Full-text available via subscription   (Followers: 5, SJR: 1.992, CiteScore: 5)
Advances in Cell Aging and Gerontology     Full-text available via subscription   (Followers: 3)
Advances in Cellular and Molecular Biology of Membranes and Organelles     Full-text available via subscription   (Followers: 12)
Advances in Chemical Engineering     Full-text available via subscription   (Followers: 27, SJR: 0.156, CiteScore: 1)
Advances in Child Development and Behavior     Full-text available via subscription   (Followers: 10, SJR: 0.713, CiteScore: 1)
Advances in Chronic Kidney Disease     Full-text available via subscription   (Followers: 10, SJR: 1.316, CiteScore: 2)
Advances in Clinical Chemistry     Full-text available via subscription   (Followers: 28, SJR: 1.562, CiteScore: 3)
Advances in Colloid and Interface Science     Full-text available via subscription   (Followers: 19, SJR: 1.977, CiteScore: 8)
Advances in Computers     Full-text available via subscription   (Followers: 14, SJR: 0.205, CiteScore: 1)
Advances in Dermatology     Full-text available via subscription   (Followers: 15)
Advances in Developmental Biology     Full-text available via subscription   (Followers: 11)
Advances in Digestive Medicine     Open Access   (Followers: 8)
Advances in DNA Sequence-Specific Agents     Full-text available via subscription   (Followers: 5)
Advances in Drug Research     Full-text available via subscription   (Followers: 23)
Advances in Ecological Research     Full-text available via subscription   (Followers: 42, SJR: 2.524, CiteScore: 4)
Advances in Engineering Software     Hybrid Journal   (Followers: 27, SJR: 1.159, CiteScore: 4)
Advances in Experimental Biology     Full-text available via subscription   (Followers: 7)
Advances in Experimental Social Psychology     Full-text available via subscription   (Followers: 43, SJR: 5.39, CiteScore: 8)
Advances in Exploration Geophysics     Full-text available via subscription   (Followers: 1)
Advances in Fluorine Science     Full-text available via subscription   (Followers: 9)
Advances in Food and Nutrition Research     Full-text available via subscription   (Followers: 53, SJR: 0.591, CiteScore: 2)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 17)
Advances in Genetics     Full-text available via subscription   (Followers: 15, SJR: 1.354, CiteScore: 4)
Advances in Genome Biology     Full-text available via subscription   (Followers: 8, SJR: 12.74, CiteScore: 13)
Advances in Geophysics     Full-text available via subscription   (Followers: 6, SJR: 1.193, CiteScore: 3)
Advances in Heat Transfer     Full-text available via subscription   (Followers: 21, SJR: 0.368, CiteScore: 1)
Advances in Heterocyclic Chemistry     Full-text available via subscription   (Followers: 11, SJR: 0.749, CiteScore: 3)
Advances in Human Factors/Ergonomics     Full-text available via subscription   (Followers: 22)
Advances in Imaging and Electron Physics     Full-text available via subscription   (Followers: 2, SJR: 0.193, CiteScore: 0)
Advances in Immunology     Full-text available via subscription   (Followers: 37, SJR: 4.433, CiteScore: 6)
Advances in Inorganic Chemistry     Full-text available via subscription   (Followers: 8, SJR: 1.163, CiteScore: 2)
Advances in Insect Physiology     Full-text available via subscription   (Followers: 2, SJR: 1.938, CiteScore: 3)
Advances in Integrative Medicine     Hybrid Journal   (Followers: 6, SJR: 0.176, CiteScore: 0)
Advances in Intl. Accounting     Full-text available via subscription   (Followers: 3)
Advances in Life Course Research     Hybrid Journal   (Followers: 8, SJR: 0.682, CiteScore: 2)
Advances in Lipobiology     Full-text available via subscription   (Followers: 1)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 9)
Advances in Marine Biology     Full-text available via subscription   (Followers: 14, SJR: 0.88, CiteScore: 2)
Advances in Mathematics     Full-text available via subscription   (Followers: 11, SJR: 3.027, CiteScore: 2)
Advances in Medical Sciences     Hybrid Journal   (Followers: 6, SJR: 0.694, CiteScore: 2)
Advances in Medicinal Chemistry     Full-text available via subscription   (Followers: 5)
Advances in Microbial Physiology     Full-text available via subscription   (Followers: 4, SJR: 1.158, CiteScore: 3)
Advances in Molecular and Cell Biology     Full-text available via subscription   (Followers: 21)
Advances in Molecular and Cellular Endocrinology     Full-text available via subscription   (Followers: 8)
Advances in Molecular Toxicology     Full-text available via subscription   (Followers: 7, SJR: 0.182, CiteScore: 0)
Advances in Nanoporous Materials     Full-text available via subscription   (Followers: 3)
Advances in Oncobiology     Full-text available via subscription   (Followers: 1)
Advances in Organ Biology     Full-text available via subscription   (Followers: 1)
Advances in Organometallic Chemistry     Full-text available via subscription   (Followers: 16, SJR: 1.875, CiteScore: 4)
Advances in Parallel Computing     Full-text available via subscription   (Followers: 6, SJR: 0.174, CiteScore: 0)
Advances in Parasitology     Full-text available via subscription   (Followers: 5, SJR: 1.579, CiteScore: 4)
Advances in Pediatrics     Full-text available via subscription   (Followers: 24, SJR: 0.461, CiteScore: 1)
Advances in Pharmaceutical Sciences     Full-text available via subscription   (Followers: 10)
Advances in Pharmacology     Full-text available via subscription   (Followers: 16, SJR: 1.536, CiteScore: 3)
Advances in Physical Organic Chemistry     Full-text available via subscription   (Followers: 8, SJR: 0.574, CiteScore: 1)
Advances in Phytomedicine     Full-text available via subscription  
Advances in Planar Lipid Bilayers and Liposomes     Full-text available via subscription   (Followers: 3, SJR: 0.109, CiteScore: 1)
Advances in Plant Biochemistry and Molecular Biology     Full-text available via subscription   (Followers: 8)
Advances in Plant Pathology     Full-text available via subscription   (Followers: 5)
Advances in Porous Media     Full-text available via subscription   (Followers: 5)
Advances in Protein Chemistry     Full-text available via subscription   (Followers: 18)
Advances in Protein Chemistry and Structural Biology     Full-text available via subscription   (Followers: 19, SJR: 0.791, CiteScore: 2)
Advances in Psychology     Full-text available via subscription   (Followers: 59)
Advances in Quantum Chemistry     Full-text available via subscription   (Followers: 6, SJR: 0.371, CiteScore: 1)
Advances in Radiation Oncology     Open Access   (SJR: 0.263, CiteScore: 1)
Advances in Small Animal Medicine and Surgery     Hybrid Journal   (Followers: 3, SJR: 0.101, CiteScore: 0)
Advances in Space Biology and Medicine     Full-text available via subscription   (Followers: 5)
Advances in Space Research     Full-text available via subscription   (Followers: 385, SJR: 0.569, CiteScore: 2)
Advances in Structural Biology     Full-text available via subscription   (Followers: 5)
Advances in Surgery     Full-text available via subscription   (Followers: 10, SJR: 0.555, CiteScore: 2)
Advances in the Study of Behavior     Full-text available via subscription   (Followers: 29, SJR: 2.208, CiteScore: 4)
Advances in Veterinary Medicine     Full-text available via subscription   (Followers: 17)
Advances in Veterinary Science and Comparative Medicine     Full-text available via subscription   (Followers: 13)
Advances in Virus Research     Full-text available via subscription   (Followers: 5, SJR: 2.262, CiteScore: 5)
Advances in Water Resources     Hybrid Journal   (Followers: 46, SJR: 1.551, CiteScore: 3)
Aeolian Research     Hybrid Journal   (Followers: 6, SJR: 1.117, CiteScore: 3)
Aerospace Science and Technology     Hybrid Journal   (Followers: 335, SJR: 0.796, CiteScore: 3)
AEU - Intl. J. of Electronics and Communications     Hybrid Journal   (Followers: 8, SJR: 0.42, CiteScore: 2)
African J. of Emergency Medicine     Open Access   (Followers: 6, SJR: 0.296, CiteScore: 0)
Ageing Research Reviews     Hybrid Journal   (Followers: 10, SJR: 3.671, CiteScore: 9)
Aggression and Violent Behavior     Hybrid Journal   (Followers: 436, SJR: 1.238, CiteScore: 3)
Agri Gene     Hybrid Journal   (SJR: 0.13, CiteScore: 0)
Agricultural and Forest Meteorology     Hybrid Journal   (Followers: 15, SJR: 1.818, CiteScore: 5)
Agricultural Systems     Hybrid Journal   (Followers: 31, SJR: 1.156, CiteScore: 4)
Agricultural Water Management     Hybrid Journal   (Followers: 43, SJR: 1.272, CiteScore: 3)
Agriculture and Agricultural Science Procedia     Open Access   (Followers: 1)
Agriculture and Natural Resources     Open Access   (Followers: 2)
Agriculture, Ecosystems & Environment     Hybrid Journal   (Followers: 56, SJR: 1.747, CiteScore: 4)
Ain Shams Engineering J.     Open Access   (Followers: 5, SJR: 0.589, CiteScore: 3)
Air Medical J.     Hybrid Journal   (Followers: 6, SJR: 0.26, CiteScore: 0)
AKCE Intl. J. of Graphs and Combinatorics     Open Access   (SJR: 0.19, CiteScore: 0)
Alcohol     Hybrid Journal   (Followers: 11, SJR: 1.153, CiteScore: 3)
Alcoholism and Drug Addiction     Open Access   (Followers: 9)
Alergologia Polska : Polish J. of Allergology     Full-text available via subscription   (Followers: 1)
Alexandria Engineering J.     Open Access   (Followers: 1, SJR: 0.604, CiteScore: 3)
Alexandria J. of Medicine     Open Access   (Followers: 1, SJR: 0.191, CiteScore: 1)
Algal Research     Partially Free   (Followers: 10, SJR: 1.142, CiteScore: 4)
Alkaloids: Chemical and Biological Perspectives     Full-text available via subscription   (Followers: 2)
Allergologia et Immunopathologia     Full-text available via subscription   (Followers: 1, SJR: 0.504, CiteScore: 1)
Allergology Intl.     Open Access   (Followers: 5, SJR: 1.148, CiteScore: 2)
Alpha Omegan     Full-text available via subscription   (SJR: 3.521, CiteScore: 6)
ALTER - European J. of Disability Research / Revue Européenne de Recherche sur le Handicap     Full-text available via subscription   (Followers: 9, SJR: 0.201, CiteScore: 1)
Alzheimer's & Dementia     Hybrid Journal   (Followers: 50, SJR: 4.66, CiteScore: 10)
Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring     Open Access   (Followers: 4, SJR: 1.796, CiteScore: 4)
Alzheimer's & Dementia: Translational Research & Clinical Interventions     Open Access   (Followers: 4, SJR: 1.108, CiteScore: 3)
Ambulatory Pediatrics     Hybrid Journal   (Followers: 6)
American Heart J.     Hybrid Journal   (Followers: 50, SJR: 3.267, CiteScore: 4)
American J. of Cardiology     Hybrid Journal   (Followers: 51, SJR: 1.93, CiteScore: 3)
American J. of Emergency Medicine     Hybrid Journal   (Followers: 44, SJR: 0.604, CiteScore: 1)
American J. of Geriatric Pharmacotherapy     Full-text available via subscription   (Followers: 10)
American J. of Geriatric Psychiatry     Hybrid Journal   (Followers: 14, SJR: 1.524, CiteScore: 3)
American J. of Human Genetics     Hybrid Journal   (Followers: 32, SJR: 7.45, CiteScore: 8)
American J. of Infection Control     Hybrid Journal   (Followers: 26, SJR: 1.062, CiteScore: 2)
American J. of Kidney Diseases     Hybrid Journal   (Followers: 34, SJR: 2.973, CiteScore: 4)
American J. of Medicine     Hybrid Journal   (Followers: 43)
American J. of Medicine Supplements     Full-text available via subscription   (Followers: 3, SJR: 1.967, CiteScore: 2)
American J. of Obstetrics and Gynecology     Hybrid Journal   (Followers: 203, SJR: 2.7, CiteScore: 4)
American J. of Ophthalmology     Hybrid Journal   (Followers: 62, SJR: 3.184, CiteScore: 4)
American J. of Ophthalmology Case Reports     Open Access   (Followers: 6, SJR: 0.265, CiteScore: 0)
American J. of Orthodontics and Dentofacial Orthopedics     Full-text available via subscription   (Followers: 6, SJR: 1.289, CiteScore: 1)
American J. of Otolaryngology     Hybrid Journal   (Followers: 25, SJR: 0.59, CiteScore: 1)
American J. of Pathology     Hybrid Journal   (Followers: 27, SJR: 2.139, CiteScore: 4)
American J. of Preventive Medicine     Hybrid Journal   (Followers: 27, SJR: 2.164, CiteScore: 4)
American J. of Surgery     Hybrid Journal   (Followers: 37, SJR: 1.141, CiteScore: 2)
American J. of the Medical Sciences     Hybrid Journal   (Followers: 12, SJR: 0.767, CiteScore: 1)
Ampersand : An Intl. J. of General and Applied Linguistics     Open Access   (Followers: 6)
Anaerobe     Hybrid Journal   (Followers: 4, SJR: 1.144, CiteScore: 3)
Anaesthesia & Intensive Care Medicine     Full-text available via subscription   (Followers: 63, SJR: 0.138, CiteScore: 0)
Anaesthesia Critical Care & Pain Medicine     Full-text available via subscription   (Followers: 15, SJR: 0.411, CiteScore: 1)
Anales de Cirugia Vascular     Full-text available via subscription  
Anales de Pediatría     Full-text available via subscription   (Followers: 3, SJR: 0.277, CiteScore: 0)
Anales de Pediatría (English Edition)     Full-text available via subscription  
Anales de Pediatría Continuada     Full-text available via subscription  
Analytic Methods in Accident Research     Hybrid Journal   (Followers: 5, SJR: 4.849, CiteScore: 10)
Analytica Chimica Acta     Hybrid Journal   (Followers: 39, SJR: 1.512, CiteScore: 5)
Analytical Biochemistry     Hybrid Journal   (Followers: 174, SJR: 0.633, CiteScore: 2)
Analytical Chemistry Research     Open Access   (Followers: 10, SJR: 0.411, CiteScore: 2)
Analytical Spectroscopy Library     Full-text available via subscription   (Followers: 11)
Anesthésie & Réanimation     Full-text available via subscription   (Followers: 2)
Anesthesiology Clinics     Full-text available via subscription   (Followers: 23, SJR: 0.683, CiteScore: 2)
Angiología     Full-text available via subscription   (SJR: 0.121, CiteScore: 0)
Angiologia e Cirurgia Vascular     Open Access   (Followers: 1, SJR: 0.111, CiteScore: 0)

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Journal Cover
Agri Gene
Journal Prestige (SJR): 0.13
Number of Followers: 0  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Online) 2352-2151
Published by Elsevier Homepage  [3163 journals]
  • Conservation of coding and untranslated regions of heat shock protein
           Beta-1 (HSPB1) gene and its expression pattern in heat stressed peripheral
           blood mononuclear cells of Indian native cattle (Bos indicus) and riverine
           buffaloes (Bubalus bubalis)
    • Authors: Asha Nigam; Shelesh Kumar Swami; Monika Sodhi; Preeti Verma; Manoj Kumar Singh; Parvesh Kumari; Ankita Sharma; O.P. Verma; Manishi Mukesh
      Pages: 9 - 17
      Abstract: Publication date: June 2018
      Source:Agri Gene, Volume 8
      Author(s): Asha Nigam, Shelesh Kumar Swami, Monika Sodhi, Preeti Verma, Manoj Kumar Singh, Parvesh Kumari, Ankita Sharma, O.P. Verma, Manishi Mukesh


      PubDate: 2018-04-25T09:07:24Z
      DOI: 10.1016/j.aggene.2018.03.001
      Issue No: Vol. 8 (2018)
       
  • Genome-wide differential expression profiling in wild and cultivar
           genotypes of cardamom reveals regulation of key pathways in plant growth
           and development
    • Authors: Nadiya F.; Anjali N.; Jinu Thomas; Gangaprasad A.; Sabu K.K.
      Pages: 18 - 27
      Abstract: Publication date: June 2018
      Source:Agri Gene, Volume 8
      Author(s): Nadiya F., Anjali N., Jinu Thomas, Gangaprasad A., Sabu K.K.
      Cardamom (Elettaria cardamomum Maton) is an economically valuable spice crop and the essential oil of cardamom possesses splendid medicinal properties. To get insight into the domestication related traits and varied gene regulation, differential expression profiling of wild and cultivar cardamom was performed by analyzing the transcriptome data available for cardamom. Functional annotation using seven different publicly available databases identified significant genes coding for enzymes participating in monoterpenoid biosynthesis. Differential expression profile of cultivar and wild genotypes of cardamom exhibited 132 unigenes as differentially expressed (log2 > 4) with 105 up regulated and 27 down regulated genes in cultivars comparing with its wild genotype. Expression analysis showed wild cardamom has increased drought stress tolerance, defense response, and various plant growth regulations. Most of the genes coding for enzymes participating in flavanoid biosynthesis were up regulated, while resistance related genes (cinnamoyl CoA reductase) and few genes involved in the monoterpenoid biosynthetic pathway were down regulated in cultivars when compared to its wild progenitor. Transcriptome data were validated and correlated using qPCR using 10 randomly selected differentially expressed genes. Our study is the first application of next generation RNA-seq to explore the genes involved in various metabolic pathways and quantification of transcript expression levels in cultivar and wild cardamom genotypes.

      PubDate: 2018-04-25T09:07:24Z
      DOI: 10.1016/j.aggene.2018.03.002
      Issue No: Vol. 8 (2018)
       
  • Multiple R genes and phenolic compounds synthesis involved in the durable
           resistance to Phytophthora infestans in potato cv. Cooperation 88
    • Authors: Dahai Hao; Jie Yang; Weibiao Long; Jing Yi; Peter VanderZaag; Canhui Li
      Pages: 28 - 36
      Abstract: Publication date: June 2018
      Source:Agri Gene, Volume 8
      Author(s): Dahai Hao, Jie Yang, Weibiao Long, Jing Yi, Peter VanderZaag, Canhui Li
      Late blight (LB), Phytophthora infestans (PI) as pathogen, is the most devastating disease limiting potato production globally. In the Tropic highlands it can reduce yields by >50%. Cooperation-88 (C88) is a potato variety with high levels of durable resistance to PI, even after being widely grown for over 20 years. To more fully understand the mechanism of the resistance to PI of this variety, we inoculated detached leaves of young C88 plants with PI isolate XA-4 (super race with vir 1–11). Samples of one day post pathogen inoculation (1 dpi), 3 dpi, 5 dpi and control treated with sterile water were collected and frozen with liquid nitrogen. Transcriptomes of these 4 samples were sequenced by the next-generation sequencing platform Illumina Hiseq 2000. Totally ~68 M clean reads were obtained. With the genome of S. phureja clone DM1–3 516R44 as reference, these clean reads were processed by GO analysis, KEGG pathway enrichment analysis and differential expression analysis. PI inoculation of C88 leaves resulted in the following: a) in the 3 pathogen inoculated samples, 3950 were differentially regulated compared to those in the control; c) at 1 dpi increased expression genes were nearly double the number of decreased expression genes; d) 665 genes were differentially expressed in every treatments; e) gene expression levels in photosynthesis and the chloroplast were mostly diminished. The high durable late blight resistance C88 is composed of: a) 344 expressed R genes; b) 9 pathogenesis-related genes, particularly osmotin gene and endochitinase gene expressions increased dramatically with PI inoculation; c) thirty genes for phenolic compounds synthesis expressions increased with PI inoculation from small to large multiples compared to the control; and d) R genes need pathogenesis proteins and phenolic compounds to have superior durable resistance to PI.

      PubDate: 2018-04-25T09:07:24Z
      DOI: 10.1016/j.aggene.2018.04.001
      Issue No: Vol. 8 (2018)
       
  • In silico identification and characterization of microRNAs based on EST
           and GSS in orphan legume crop, Lens culinaris medik. (Lentil)
    • Authors: A.T. Vivek
      Pages: 45 - 56
      Abstract: Publication date: June 2018
      Source:Agri Gene, Volume 8
      Author(s): A.T. Vivek
      MicroRNAs (miRNAs) are a class of endogenous non-coding, small RNAs that are associated with the regulation of gene expression in eukaryotes. In plants, few miRNAs are highly conserved, that may have the same ancestor in the early stages of evolution. This fact allows the detection of conserved miRNAs in various plant species, especially in those that lack genome sequence information. Though the draft genome of the orphan crop, Lens culinaris Medik. (Lentil) is published, its complete genome assembly is still underway. In this computational study, an EST and GSS based comparative genomics approach were conducted to identify miRNAs in Lentils. The adopted approach was on the basis of a search for sequence similarity followed by series of filtering steps to provide reliable and precise results, eliminating the false-positive predictions. This study reports 24 miRNAs from 10,190 ESTs and 715 GSSs in Lentil. Further, it was also sought to pinpoint the 83 likely target genes of Lentil miRNAs and their most probable functions using Legume Information Resource (LIS) annotation pipeline. The newly identified miRNAs were mainly found to regulate the genes that encode transcription factors and key enzymes involved in metabolic processes as well as oxidation-reduction processes. Many of target genes were found to have an association with plant growth and development, stress response, defense and hormone signaling pathways. The miRNAs accounted is presumed to advance Lentil miRNAome in future as this computational study puts forward, first-ever, view towards miRNA research in Lentil.

      PubDate: 2018-06-01T08:04:41Z
      DOI: 10.1016/j.aggene.2018.05.003
      Issue No: Vol. 8 (2018)
       
  • An overview of the APA locus and arcelin proteins and their
           biotechnological potential in the control of bruchids
    • Authors: Maria Angélica Gaag Duarte; Glaucia Barbosa Cabral; Abdulrazak Baba Ibrahim; Francisco José Lima Aragão
      Pages: 57 - 62
      Abstract: Publication date: June 2018
      Source:Agri Gene, Volume 8
      Author(s): Maria Angélica Gaag Duarte, Glaucia Barbosa Cabral, Abdulrazak Baba Ibrahim, Francisco José Lima Aragão
      As an important legume, common bean (Phaseolus vulgaris L.) is widely utilized as a staple crop and as a source of protein, minerals and vitamins for resource-poor populations in the tropics and in subtropical regions. However, substantial amounts of common beans may be lost due to infestations by bruchids and nematodes, among other pests. With the discovery of arcelins, a class of seed proteins, a biotechnological approach to addressing attacks by bruchids may be developed. Arcelins are components of a multigene family encoded by the APA locus [arcelin (Arc)/Phytohemagglutinin (PHA)/α-Amylase Inhibitor (αAI)] and have been shown to confer resistance to bruchids. Here we present an overview of the APA locus and briefly discuss the function of the components that make up this gene family, while linking this to the biocidal effects of the arcelin proteins and their biotechnological potential in the control of bruchids in common bean and other leguminous crops.

      PubDate: 2018-06-01T08:04:41Z
      DOI: 10.1016/j.aggene.2018.05.001
      Issue No: Vol. 8 (2018)
       
  • Ontogenetic and expression of different genes involved in the Toll pathway
           of black tiger shrimp (Penaeus monodon) following immersion challenge with
           Vibrio harveyi and white spot syndrome virus (WSSV)
    • Authors: K. Sreedharan; A. Deepika; Anutosh Paria; M.K. Bedekar; M. Makesh; K.V. Rajendran
      Pages: 63 - 71
      Abstract: Publication date: June 2018
      Source:Agri Gene, Volume 8
      Author(s): K. Sreedharan, A. Deepika, Anutosh Paria, M.K. Bedekar, M. Makesh, K.V. Rajendran
      In the present study, ontogenetic expression of different innate immune genes in the Toll pathway of tiger shrimp, Penaeus monodon, such as TLR, myeloid differentiation factor 88 (MyD88) and tumor necrosis factor (TNF) receptor-associated factor 6 (TRAF6), was investigated in different developmental stages. Ontogenetic expression by real-time PCR revealed constitutive expression of these genes in all the developmental stages selected. TLR expression was found to be the highest in PL4, whereas MyD88 and TRAF6 showed the highest expression in eggs. The ubiquitous expression of TLR, MyD88 and TRAF6 in different developmental stages of P. monodon indicates the role of these genes in protecting the animals during early development. Immersion challenge of PL 18 with V. harveyi resulted in significant upregulation of TRAF6 at all time-points and significant upregulation of TLR at most of the time-points selected; however, MyD88 showed differential modulation pattern. In contrast to the bacterial challenge, WSSV infection in PL18 did not show any significant change in the expression of TRAF6, except for a downregulation observed at 12 to 48 hpi. However, TLR and MyD88 showed moderate increase in their expression, especially at late time-points. The responses of these genes to V. harveyi and WSSV immersion challenges in the juveniles (average body weight 3 g) of P. monodon were investigated in selected tissues including gill, hepatopancreas, and different parts of gastrointestinal tract such as foregut (stomach), midgut and hindgut. Temporal expression analysis revealed complete downregulation of PmMyD88 at most of the time-points in the gill following V. harveyi challenge and significant induction of PmTRAF6 at all time-points following WSSV infection. Immersion challenge with V. harveyi resulted in enhanced expression of TRAF6 in stomach and MyD88 in hepatopancreas showed similar pattern of expression post-WSSV challenge. Other tissues showed varying levels of induction of these genes at different time-points following pathogen challenge. The results of the present study suggest that both bacterial and viral challenges through immersion modulates the genes involved in the Toll pathway, and this might play an important role in the immune defense of post-larvae and juveniles of P. monodon.

      PubDate: 2018-06-01T08:04:41Z
      DOI: 10.1016/j.aggene.2018.05.002
      Issue No: Vol. 8 (2018)
       
  • KCNJ11 gene expression is associated to feed consumption and growth traits
           in Nelore beef cattle
    • Authors: Wellison J.S. Diniz; Kamila O. Rosa; Luiz L. Coutinho; Polyana C. Tizioto; Priscila S.N. de Oliveira; Marcela M. de Souza; Amália S. Chaves; Dante P.D. Lanna; Gerson B. Mourão; Luciana C.A. Regitano
      Abstract: Publication date: Available online 31 May 2018
      Source:Agri Gene
      Author(s): Wellison J.S. Diniz, Kamila O. Rosa, Luiz L. Coutinho, Polyana C. Tizioto, Priscila S.N. de Oliveira, Marcela M. de Souza, Amália S. Chaves, Dante P.D. Lanna, Gerson B. Mourão, Luciana C.A. Regitano
      Feed efficiency is a complex trait influenced by several genes and biological processes. However, there is limited knowledge about the genes and pathways involved in this trait. KCNJ11, related to the insulin secretion pathway, was shown to be a functional candidate gene for meat quality traits in Nelore. Given its role in energy metabolism, we evaluated the effects of KCNJ11 gene expression level on feed efficiency-related, carcass and growth traits in Nelore steers. Skeletal muscle KCNJ11 mRNA levels were positively and significantly associated with dry matter intake (DMI), total digestible nutrients consumption (TDN), average daily gain (ADG), and relative growth rate (RGR) from a general linear mixed model approach. Co-expression analysis, using RNA sequencing data obtained from Longissimus dorsi (LD) muscle of 30 Nelore steers, identified key signalling pathways related to the regulation of energy metabolisms, such as mitogen-activated protein kinases and insulin pathways. Our findings indicate a linear relationship between KCNJ11 gene expression and the phenotypic measures for feed intake, weight gain, and relative growth rate in Nelore steers, but not for residual feed intake or fat deposition traits.

      PubDate: 2018-06-01T08:04:41Z
      DOI: 10.1016/j.aggene.2018.05.004
       
  • High resolution melting (HRM)-based STMS marker analysis for rapid
           identification of radiation induced mutants of sugarcane
    • Authors: J. Mirajkar Shriram; R. Vaidya Eknath; Suprasanna Penna
      Abstract: Publication date: Available online 19 April 2018
      Source:Agri Gene
      Author(s): J. Mirajkar Shriram, R. Vaidya Eknath, Suprasanna Penna
      Molecular marker based selection has become the method of choice to find undiscoverable natural variations and induced mutations in plants. Routine gel based molecular marker screening procedures involve complex steps which requires considerable investment of time, money and efforts. Most often, genomic configuration of a plant species complicates the ultimate output of such screening programme. Therefore, a reliable and rapid high-throughput method is required to facilitate ease in identification of variants in a large number of samples. Here we demonstrate application of a high-resolution melting (HRM) method to detect gamma radiation induced mutants of sugarcane (Saccharum spp.) which is a complex aneu-polyploidy plant. We have screened nine distinct mutants using sequence-tagged microsatellite site (STMS) markers and the analyses based on gel electrophoresis and HRM curve were compared. All the six STMS microsatellite markers coupled with HRM analysis were found highly informative and generated a unique melting curve for each of the marker tested. Of these, two markers NKSCSSR 22 and NKSCSSR 42 exhibited differential melting curve among the mutants and these results were well correlated with the gel based banding pattern. Taken together these results highlighted potential of HRM based marker screening and demonstrated reliability and robustness in detecting induced mutations in a complex polyploidy plant like sugarcane.

      PubDate: 2018-04-25T09:07:24Z
      DOI: 10.1016/j.aggene.2018.04.002
       
  • Bioinformatics profiling and expressional studies of microRNAs in root,
           stem and leaf of the bioenergy plant switchgrass (Panicum virgatum L.)
           under drought stress
    • Authors: Muhammad Younas Khan Barozai; Zhujia Ye; Sasikiran Reddy Sangireddy; Suping Zhou
      Abstract: Publication date: Available online 22 February 2018
      Source:Agri Gene
      Author(s): Muhammad Younas Khan Barozai, Zhujia Ye, Sasikiran Reddy Sangireddy, Suping Zhou
      Switchgrass (Panicum virgatum L.) is a perennial fodder grass and well known as a model renewable bioenergy crop. The plant's high production of biomass for biofuel supply is due to its fast-growing and wide adaptation properties. Very little studies and data are available about microRNAs (miRNAs) in this important biofuel crop. This situation demands to focus and identify new miRNAs and also to study their expressional analysis. In current research, a combination of computational and expressional approaches is applied to profile and characterize miRNAs in switchgrass and analyze some of them under drought stress. A total of 158 new miRNAs belonging to 83 families are identified and characterized from switchgrass expressed sequence tags (ESTs) and genomic survey sequences (GSS). In addition, five pre-miRNA clusters as well as four sense and antisense pre-miRNAs are also predicted from these newly identified miRNAs. Furthermore, 39 miRNAs were randomly selected and subjected to quantitative real-time RT-PCR expressional studies in root, leaf and stem of switchgrass under drought stress. A set of 13, 20 and 25 miRNAs are found as drought responding miRNAs in root, stem and leaf respectively. A total of 894 putative targets are also predicted for 158 switchgrass' miRNAs. These targets play roles in metabolism, transcription factor, signaling pathways, growth & development, stress-related, transport protein and other vital processes. Such findings in switchgrass improved the baseline data of miRNAs and their targets. This data can be utilized to fine-tune this important bioenergy crop under biotic and abiotic stresses. Furthermore, it can also be used for the improvement of biofuel properties of the plant.

      PubDate: 2018-02-27T05:12:50Z
      DOI: 10.1016/j.aggene.2018.02.001
       
  • In silico identification of microRNAs and their targets associated with
           coconut embryogenic calli
    • Authors: A.A. Sabana; Ginny Antony; C.U. Rahul; M.K. Rajesh
      Abstract: Publication date: Available online 10 January 2018
      Source:Agri Gene
      Author(s): A.A. Sabana, Ginny Antony, C.U. Rahul, M.K. Rajesh
      Coconut palms are propagated mainly through nuts, which does not meet the requirement of quality planting materials for large scale planting. In vitro propagation to enhance production of high yielding, disease-free planting material in coconut has remained a distant reality because of its in vitro recalcitrance. MicroRNAs (miRNAs) have been implicated in the regulation of a plethora of cellular, physiological and developmental processes which include developmental regulation, hormone response and adaptation to stresses. In this study, computational methods were utilized to identify conserved miRNA from transcriptome data of coconut embryogenic calli. A total of 117,790 unigenes from coconut embryogenic calli were compared against monocot mature miRNA sequences. A total of 27 mature miRNA sequences, belonging to 15 miRNA families, viz. miR156, miR164, miR166, miR167, miR169, miR171, miR172, miR394, miR397, miR408, miR444, miR535, miR827, miR1134 and miR2118, were identified. Many of these have well defined and crucial roles in developmental pathways and hormone signalling in other plant species. Each of the identified miRNA had its own predicted targets. This is the first in silico study describing miRNAs and their role in the regulation of in vitro embryogenesis in coconut. The results obtained in this study would provide a base for future studies to address molecular mechanisms that govern in vitro recalcitrance in coconut and the role of miRNAs in the process.

      PubDate: 2018-01-26T21:08:39Z
      DOI: 10.1016/j.aggene.2018.01.002
       
  • Transgenic expression of a maize geranyl geranyl transferase gene sequence
           in maize callus increases resistance to ear rot pathogens
    • Authors: Patrick F. Dowd; Bruce W. Zilkowski; Eric T. Johnson; Mark A. Berhow; Ephantus J. Muturi
      Abstract: Publication date: Available online 3 January 2018
      Source:Agri Gene
      Author(s): Patrick F. Dowd, Bruce W. Zilkowski, Eric T. Johnson, Mark A. Berhow, Ephantus J. Muturi
      Determining the genes responsible for pest resistance in maize can allow breeders to develop varieties with lower losses and less contamination with undesirable toxins. A gene sequence coding for a geranyl geranyl transferase-like protein located in a fungal ear rot resistance quantitative trait locus was cloned from an inbred with reported resistance to Fusarium proliferatum and Fusarium verticillioides ear rot. Transgenic expression of the gene in maize callus reduced colonization by these two Fusarium species and also Fusarium graminearum relative to a β-glucuronidase (GUS) transformant control. Some transformants were also more insect resistant. The more fungal resistant transformant lines produced higher levels of headspace ethanol which were significantly associated with antifungal activity, especially for F. verticillioides. Maize pyruvate decarboxylase appears to have a moiety capable of interacting with the geranyl geranyl transferase, suggesting ethanol production is enhanced due to more efficient transfer of pyruvate through the mitochondrial membrane. Other undetermined mechanisms may also be enhancing resistance of the transformants to the Fusarium fungus, however. This is the first report of the involvement of a geranyl geranyl transferase-like sequence in fungal resistance in plants, and represents a novel mechanism for producing higher yielding and better quality maize.

      PubDate: 2018-01-05T04:00:32Z
      DOI: 10.1016/j.aggene.2018.01.001
       
  • Season of collection and sperm head shape impacts expression of CARHSP and
           FTL from motile-rich boar sperm
    • Authors: L.A. Rempel; M.M. Krautkramer; T.M. Loether; J.J. Parrish; J.R. Miles
      Pages: 1 - 6
      Abstract: Publication date: March 2018
      Source:Agri Gene, Volume 7
      Author(s): L.A. Rempel, M.M. Krautkramer, T.M. Loether, J.J. Parrish, J.R. Miles
      The objective of the current study was to evaluate transcript activity of motile-rich sperm collected from June (spring) or August (summer), stored as cooled-extended (ExT) or cryopreserved (FrZ), and selected for least or most sperm head shape change, using Fourier harmonic analysis techniques, between June and August. Even with the lack of an extended heat stress, motile-rich sperm transcripts were influenced by season and putatively by sperm head shape change. Transcripts that had previously been associated with seasonality of sperm collection and methylation pathway transcripts were evaluated among semen samples. Calcium-regulated heat-stable protein 1-like transcript from motile-rich sperm tended (P=0.0829) to be greater in samples collected in June in comparison to August samples. Ferritin light polypeptide transcript tended (P=0.0838) to be greater from motile-rich sperm with least head shape change from June collection in contrast to sperm collected in August. Both transcripts have a functional role in cytoprotection and may serve to improve boar semen activity and quality during thermal stress or seasonal changes.

      PubDate: 2017-10-25T03:53:33Z
      DOI: 10.1016/j.aggene.2017.10.002
      Issue No: Vol. 7 (2017)
       
  • Genes, transcription factors and enzymes involved in lipid metabolism in
           fin fish
    • Authors: Christian Larbi Ayisi; Cheng Yamei; Jin-Liang Zhao
      Pages: 7 - 14
      Abstract: Publication date: March 2018
      Source:Agri Gene, Volume 7
      Author(s): Christian Larbi Ayisi, Cheng Yamei, Jin-Liang Zhao
      Lipid metabolism in fish which is a complex phenomenon has been studied in the past few years as its gradually gaining interest from researchers. Lipids serve essential roles in both physiological and life cycle of fish. In this study, we review the functions of some genes and enzymes that are related to the metabolism of lipids in fish. We also review how these enzymes and genes are affected by different lipid sources since alternative lipids are being sought for. From the study, genes such as PPARs, ACC, SCD, FASN, CPT, ACYL and a host of others regulate the lipid metabolic pathways.

      PubDate: 2017-10-25T03:53:33Z
      DOI: 10.1016/j.aggene.2017.09.006
      Issue No: Vol. 7 (2017)
       
  • Overexpression of mango alcohol dehydrogenase (MiADH1) mimics hypoxia in
           transgenic tomato and alters fruit flavor components
    • Authors: Rajesh Kumar Singh; Smriti Srivastava; Hemangi G. Chidley; Pravendra Nath; Vidhu A. Sane
      Pages: 23 - 33
      Abstract: Publication date: March 2018
      Source:Agri Gene, Volume 7
      Author(s): Rajesh Kumar Singh, Smriti Srivastava, Hemangi G. Chidley, Pravendra Nath, Vidhu A. Sane
      Plant alcohols and aldehydes are produced by the action of alcohol dehydrogenases (ADH) and play an important role during fruit ripening and aroma production. Alcohols are not only produced in different tissues at different stages of plant development but are also products of the fermentative pathway which gets activated by different stresses, including hypoxia. The ADH gene is a well-established marker for hypoxic response as well as plant aroma. In a previous report we have identified and characterized three ADHs (MiADH1, 2, 3) from Dashehari mango. MiADH1 was found to be fruit specific and was upregulated by ethylene and ABA, suggesting a role in fruit aroma volatile production. In order to functionally characterize MiADH1, transgenic tomato plants were developed under the control of the constitutive (CaMV35S) promoter. Transgenic tomato fruit expressing MiADH1 gene showed a change in the levels of several alcohols and aldehydes related to flavor in comparison to the control. The change in aroma and volatiles compounds was more prominent during the ripe stage as compared to unripe and mid-ripe stages of tomato fruit. The transgenic tomato plants also produced adventitious roots. Our results suggest that the overexpression of MiADH1 in tomato plants induced the fermentative pathway in roots, and mimicked hypoxic response by development of adventitious roots from the stem as an adaptive mechanism.

      PubDate: 2017-11-15T03:45:55Z
      DOI: 10.1016/j.aggene.2017.10.003
      Issue No: Vol. 7 (2017)
       
  • Identification of differentially expressed genes in two grape varieties
           cultivated in semi-arid and temperate regions from West-Bank, Palestine
    • Authors: Omar Saleh; Jamil Harb; Ali Karrity; M. Asif Arif; Wolfgang Frank
      Pages: 34 - 42
      Abstract: Publication date: March 2018
      Source:Agri Gene, Volume 7
      Author(s): Omar Saleh, Jamil Harb, Ali Karrity, M. Asif Arif, Wolfgang Frank
      Plants respond to stress conditions by altering genetic pathways. In this study, we aimed to identify and analyze differentially expressed genes in leaves of two grape varieties (genotypes) that were grown in Palestine either in a semi-arid region with a prolonged drought and high temperature stress or in a temperate region with moderate stress levels. In total, twelve transcripts with altered expression patterns, either by stress or genotype, were identified with the differential display RT-PCR (DDRT-PCR) technique and validated via quantitative real-time PCR (qRT-PCR). Eight transcripts represent genes that are down-regulated by stress in the leaves of at least one variety, among of which are members of the DEAD-box RNA helicase, Haloacid Dehalogenase (HAD) hydrolase, kinesin-like, and mitochondrial Adenine nucleotide transporter (ANT) gene families. Two genes encoding for members of the GDSL Lipase/Esterase and Multiprotein Bridging Factor (MBF) gene families were found to be up-regulated in stressed leaves. Two transcripts coding for a NAC-domain containing protein and a WD-repeat containing protein, respectively, were found to be non-responsive to those abiotic stresses but are differentially expressed in a genotype-dependent manner.

      PubDate: 2017-11-15T03:45:55Z
      DOI: 10.1016/j.aggene.2017.11.001
      Issue No: Vol. 7 (2017)
       
  • Identification of BABY BOOM homolog in bread wheat
    • Authors: Andriy Bilichak; Justin Luu; Fengying Jiang; Franҫois Eudes
      Abstract: Publication date: Available online 21 November 2017
      Source:Agri Gene
      Author(s): Andriy Bilichak, Justin Luu, Fengying Jiang, Franҫois Eudes
      Modern breeding practice of small grain cereals necessitates the development of an efficient system for the large scale and reproducible production of the doubled haploid (DH) lines. It is believed that among the available DH generation techniques, only isolated microspore culture (IMC) can satisfy the demand of public and private breeding programs. Unfortunately, the IMC method is prone to several challenges that jeopardizes its large scale adoption. One of the approaches to limit the variation in DH plant production and increase the efficiency of the method is manipulation of embryogenesis-related genes. Here we set up a study to map BABY BOOM in a bread wheat genome. The gene is one of the morphogenic regulators of somatic embryogenesis in plants. To achieve this task, we used amino acid sequences of Zea mays BBM-like proteins. TaBBM homoeologs were mapped to chromosomes 6AL, 6BL and 6DL. Amino acid sequence analysis revealed the presence of two AP2 domains and bbm-1 motif in the A and D copies and only one AP2 domain and bbm-1 motif in the B copy. This, along with the absence of both gene expression and predictable TATA-box, suggests that TaBBM-gB is a pseudogene. The expression pattern of the identified A and D homoeologs was similar to that for the BBM-like genes in other species and presence of the transcript was detected in an embryogenic microspore population. Identification of the TaBBM homolog can have application in elevating the efficiency of DH production, tissue culture, plant transformation and genome editing for wheat improvement.

      PubDate: 2017-11-25T10:07:08Z
      DOI: 10.1016/j.aggene.2017.11.002
       
  • Identification of a maize (Zea mays) chitinase allele sequence suitable
           for a role in ear rot fungal resistance
    • Authors: Patrick F. Dowd; Todd A. Naumann; Neil P.J. Price; Eric T. Johnson
      Abstract: Publication date: Available online 14 October 2017
      Source:Agri Gene
      Author(s): Patrick F. Dowd, Todd A. Naumann, Neil P.J. Price, Eric T. Johnson
      Chitinases are thought to play a role in plant resistance to pathogens, but the extent of this role is unknown. The gene for a maize (Zea mays) chitinase “chitinase 2” previously reported to be induced by two ear rot pathogens in one maize inbred, was cloned from mRNA isolated from milk stage kernels of several different inbreds reported to be susceptible or resistant to ear rot pathogens. The chitinase gene sequence of some of the susceptible inbreds had frame shifts which would result in a nonfunctional protein. Other susceptible inbreds, and a few resistant inbreds, were missing regions that would contribute to chitin binding. A putative functional clone from a resistant inbred was expressed in yeast, and produced a protein with chitinase activity against different oligomers of N-acetyl glucosamine and modified chitin. The yeast-produced chitinase was also resistant to degradation by proteases from maize ear rot fungi, and enhanced antifungal activity of miconazole towards Fusarium graminearum. When introduced in maize callus transgenically, the callus expressing the chitinase 2 gene had significantly less growth of the ear rot pathogen, F. graminearium, than callus which did not express the gene. This information suggests susceptibility and resistance to ear rot pathogens is influenced not only by expression levels, but also by the sequence of putative resistance genes. Previous reports of increased expression of putative resistance genes need to be tempered with the realization that they may play no role in resistance if the genes code for nonfunctional or reduced function proteins.

      PubDate: 2017-10-18T00:29:04Z
      DOI: 10.1016/j.aggene.2017.10.001
       
 
 
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