Journal Cover Plant Science Today
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  This is an Open Access Journal Open Access journal
   ISSN (Print) 2348-1900 - ISSN (Online) 2348-1900
   Published by Horizon e-Publishing Group Homepage  [1 journal]
  • Enumerative checklist of pteridophytes from Satara district (MH), India

    • Authors: Sachin M. Patil, Meena M. Dongare
      Pages: 75 - 87
      Abstract: A checklist of pteridophytes from Satara Dt. (Maharashtra, India) presented 85 species of pteridophytes belonging to 39 genera under 26 families are listed. The most specious families found in Satara district are Pteridaceae, Ophioglossaceae, Adiantaceae, Lomariopsidaceae and Woodsiaceae followed by Polypodiaceae, Dryopteridaceae, and Davalliaceae. The most common species are Adiantum philippense, Actiniopteris radiata, Aleuritopteris bicolor, Pteridium revolutum, Pityrogramma calomelanos, Pteris biaurita, P. vittata, and Tectaria coadunata.
      PubDate: 2017-06-28
      Issue No: Vol. 4, No. 3 (2017)
       
  • Effects of exogenous and foliar applications of Brassinosteroid (BRs) and
           salt stress on the growth, yield and physiological parameters of
           Lycopersicon esculentum (Mill.)

    • Authors: Muhammad Irfan, Jan Alam, Imran Ahmad, Imtiaz Ali, Humaira Gul
      Pages: 88 - 101
      Abstract: The germination response of Lycopersicon esculentum was studied on different salinity levels from control (non-saline), 0.2,0.4,0.6 and 0.8% NaCl solution. Seeds germinating under salt stress exhibited decrease in saline media as compared to respective control. Seeds germinating with salinity and brassinosteroid (applied exogenously through roots and as foliar spray, 0.25 and 0.5 ppm) exhibited promotion in control as compared to their respective saline media. Plants treated with different salts concentrations (60 and 100mM) NaCl exhibited reduction in plant height, root length, number of leaves, number of fruits and biomass as compared to control while brassinosteroid having concentrations of 0.25 and 0.5 ppm (applied through roots and as foliar spray) caused promotion in plant height, root length, number of leaves, number of fruits and biomass in saline and non saline media. Plants treated with different salts concentration of (60 and 100mM) NaCl exhibited increase in Relative water content, leaf water loss, electrolyte leakage, shoot/- root ratio, root/- weight ratio and leaf/- weight ratio at both NaCl concentrations (60 and 100 mM) as compared to control, while stem/- weight ratio showed reduction at both salinity levels as compared to control while brassinosteroid applied in roots and as a foliar spray at 0.25 and 0.5 ppm concentrations exhibited reduction in stem/- weight ratio at high NaCl level (100 mM) as compared to control. 
      PubDate: 2017-06-29
      Issue No: Vol. 4, No. 3 (2017)
       
  • Anisochilus carnosus (L. f.) Wall. ex Benth. (Lamiaceae) – a new
           generic record for Pakistan

    • Authors: Ashfaq Ali, Muhammad Irfan, Mahrine Rashid, Amir Sultan
      Pages: 102 - 104
      Abstract: Anisochilus carnosus (L. f.) Wall. ex Benth., is recorded for the first time from Gadoon mountain, district Swabi, Khyber Pakhtunkhwa, Pakistan. Detailed taxanomic description, habitat photographs are provided for its easy identification. Conservation status of the taxa in the relevant habitat is suggested.
      PubDate: 2017-07-14
      Issue No: Vol. 4, No. 3 (2017)
       
  • Phytophthora infestans induced defense response in calli of wild and
           cultivated potato genotypes: Pathogen induced cell death in cultures - a
           marker for resistance

    • Authors: Kumari N Aruna, Veena S Anil, B. T. Krishnaprasad
      Pages: 105 - 120
      Abstract: Late Blight caused by Phytophthora infestans (Mont.) de Bary is the most destructive foliar disease causing 30% yield losses in the potato (Solanum tuberosum L.) crop globally. Wild potato genotypes AC1 and AC4, and potato cultivar Kufri Girdhari are highly resistant, whereas wild genotype AC6, and cultivars Kufri Chandramuki and Kufri Jyoti are susceptible to Late Blight. In the current study, the calli of these six potato genotypes were used to understand the mechanism of cellular resistance to Late Blight. Exposure to P. infestans or its elicitors significantly induced peroxidase (POX) and superoxide dismutase (SOD) activities, and induced accumulation of phenolics and flavonoids, indicating the capability of the calli cells to mount a defense response. The study is the first to report the extracellular secretion of defense enzymes, SOD and POX when cells encounter the pathogen, implicating a similar whole-plant phenomenon of enhanced defense in the apoplast. Interestingly, the calli of resistant genotypes showed poor survival upon exposure to pathogen or when grown on elicitor medium, while the susceptible genotypes showed better survival. The percentage of calli cells accumulating intracellular H2O2 was high in resistant genotypes, and directly correlated with the observed higher cell death. The study shows that H2O2 accumulation in the cells of resistant genotypes is indeed self-destructive, a whole plant phenomenon termed hypersensitive response - cell death at site of infection. The potato callus system thus can be used to gain new insights into the plant-defense response to P. infestans.
      PubDate: 2017-07-22
      Issue No: Vol. 4, No. 3 (2017)
       
  • Plant Growth Promoting Rhizobacteria (PGPR) and Plutella xylostella (L.)
           (Lepidoptera: Plutellidae) interaction as a resistance inductor factor in
           Brassica oleracea var. capitata

    • Authors: Paula Cristina Brunini Crialesi, Robson Thomaz Thuler, Fernando Henrique Iost Filho, Ana Maria Guidelli Thuler, Manoel Victor Franco Lemos, Sergio Antonio de Bortoli
      Pages: 121 - 132
      Abstract: Resistance of Plutella xylostella populations to chemical insecticides has made its management difficult, and the utilization of resistant cabbage cultivars has been shown to be a useful alternative. The objective of this study was to demonstrate the induction of cabbage plant resistance to P. xylostella using PGPR and injuries caused by the pest larvae as elicitors. Therefore, we evaluated the insects’ responses utilizing a specific bioassay. Furthermore, this assay was used for selecting a PGPR strain that affects the insect’s biology, and to examine molecular and biochemical responses of the plants influenced by the plant-microbe-insect interaction. Among the strains used in this study, Kluyvera ascorbata showed the most relevant results by influencing biological characteristics of the insect. Thus, the following tests demonstrated that the cited strain possesses a high influence on plant metabolism when it undergoes different types of stress such as injuries caused by the pest. These findings were determined from the different responses obtained by the chemical analyses of the tested plants and from the differentiation in the genetic sequences obtained from plants inoculated with or without PGPR that were injured by the pest. The PGPR K. ascorbata alters the metabolism of cabbage plants, which directs a specific plant defense against P. xylostella.
      PubDate: 2017-08-01
      Issue No: Vol. 4, No. 3 (2017)
       
  • Ethnobotanical plants of Veligonda Hills, Southern Eastern Ghats, Andhra
           Pradesh, India

    • Authors: S K M Bhasha, P Siva Kumar Reddy
      Pages: 1 - 11
      Abstract: The Veligonda range which separates the Nellore district from Kadapa and Kurnool is the back bone of the Eastern Ghats, starting from Nagari promontory in Chittoor district. It runs in a northerly direction along the western boarders of the Nellore district, raising elevation of 3,626 feet at Penchalakona in Rapur thaluk. Veligonda hill ranges have high alttudinal and deep valley. These hills have rich biodiversity and many rare, endangered, endemic and threatned plants are habituated in these hills. The present paper mainly deals with the ethanobotanical plants used by local people.
      PubDate: 2017-01-01
      DOI: 10.14719/pst.2017.4.1.268
      Issue No: Vol. 4, No. 2 (2017)
       
  • Molecular characterization of two AP2/ERF transcription factor genes from
           Egyptian tomato cultivar (Edkawy)

    • Authors: Kareem Mosa, Eslam Heb El-din, Ahmed Ismail, Fawzy El- Feky, Ali El-Refy
      Pages: 12 - 20
      Abstract: The tomato is ranked first amongst vegetable crops in Egypt in relation to surface area and production. The Egyptian tomato cultivar Edkawy has shown abiotic stress tolerance characteristics. However, there is not much information about the molecular characterization of this cultivar. Furthermore, information regarding the identification of abiotic stress tolerance genes from the Edkawy tomato cultivar is lacking. Here, we investigated the ability of the Edkawy cultivar to tolerate drought stress. Two varieties were used as a control in this study; Peto86 (sensitive variety) and Strain B (tolerant variety). Edkawy, Peto86 and Strain B varieties were exposed to drought stress by reducing the water supply gradually. Interestingly, Edkawy demonstrated a remarkable tolerance phenotype to drought stress. Furthermore, we identified and isolated two members of the AP2/ERF transcription factor family from Edkawy which are associated with abiotic stress, particularly drought, i.e. ERF1 and ERF5. Protein prediction, validation and active site prediction of ERF1 and ERF5 were also determined. In addition to the domain obtained by the pfam online tool, the interaction between Edkawy ERFs proteins and other proteins in the Solanaceae family was obtained. Furthermore, subcellular localization was determined by the ngLOC and Plant-mPLoc online tools. Characterization of the Edkawy tomato cultivar and isolation and identification of such transcription factors will help in the engineering of tomato plants with abiotic stress tolerance.
      PubDate: 2017-01-01
      DOI: 10.14719/pst.2017.4.1.269
      Issue No: Vol. 4, No. 2 (2017)
       
  • In vitro conservation protocol of Ceropegia bulbosa: An important
           medicinal and threatened plant species of Western Rajasthan

    • Authors: Suman Parihar
      Pages: 21 - 27
      Abstract: In vitro regeneration protocol has been standardized for highly medicinal and threatened succulent Ceropegia bulbosa Roxb. The paper focuses on morphogenic response of nodal explant when cultured on MS media. Murashige and Skoog medium supplemented with 6-benzyladenine (BA) (2.0 mgl-1) was found optimum for axillary shoot bud induction with 83.4 % response. Further shoots were multiplied through repetitive (3-4 times) transfer of the original explant and by subculture of the in vitro generated shoots. Maximum number of shoots 5.7±0.78 with shoot length of 3.6±0.82 cm was achieved on MS medium augmented with combination of 0.25 mgl-1 BA + 0.25 mgl-1 KN + 0.1 mgl-1 IAA and additives (50.0 mgl-1 ascorbic acid, 25 mgl-1 each of citric acid, arginine and adenine sulphate). For ex vitro rooting, pulse treatment of IBA 250 mgl-1 for 3 min was found optimum. The rooted shoots were successfully hardened in the green house condition (RH 75-80% at 26-28˚C) and about 80 % shoots were transferred to the garden.
      PubDate: 2017-01-01
      DOI: 10.14719/pst.2017.4.1.271
      Issue No: Vol. 4, No. 2 (2017)
       
  • Amelioration of salinity stress by NaCl pretreatment with reference to
           sugar metabolism in legumes Cajanas cajan L. and Vigna mungo L.

    • Authors: Paramita Chatterjee, Sabarni Biswas, Asok Kumar Biswas
      Pages: 28 - 40
      Abstract: The effect of salinity stress and its amelioration by pretreatment with low concentration of NaCl (50mM) on growth and sugar metabolism in arhar (cv. T120) and maskalai (cv. WBU109) seedlings were studied. Salinity was found to be more toxic for root growth than shoot growth. Fresh weight and dry weight of the seedlings gradually decreased with increasing concentrations of NaCl treatment. It was demonstrated that direct germination on NaCl solution increased both reducing sugar and non-reducing sugar contents while decreased the starch contents which were to some extent decreased by pretreatment of seeds with 50mM NaCl prior to germination in salt solutions. Salinity stress also affected the activites of different sugar metabolizing enzymes. The increase in the activities of starch phosphorylase, sucrose phosphate synthase, sucrose synthase and decrease in the activities of acid invertase were observed in directly salt treated test seedlings that were altered by pretreatment with sublethal concentration of NaCl in both the cultivars arhar (cv. T120) and maskalai (cv. WBU109) seeds. Thus the application of pretreatment by sublethal concentration of NaCl in both arhar (cv. T120) and maskalai (cv. WBU109) seeds exhibited significant alteration of all the partinent parameters tested under salinity stress and the effect of pretreatment in most of the parameters were more prominent in arhar (cv. T120) with compared to maskalai (cv. WBU109) seedlings.
      PubDate: 2017-01-01
      DOI: 10.14719/pst.2017.4.1.272
      Issue No: Vol. 4, No. 2 (2017)
       
  • Bryophyte diversity of Thamarassery pass (Wayanad pass) in the Western
           Ghats of Kerala

    • Authors: Mithun Venugopal, Manju C Nair
      Pages: 41 - 48
      Abstract: The bryophyte diversity in the Thamarassery pass (Wayanad pass) a historically important place of Kozhikode district is documented. This report represents many interesting finds such as Taxiphyllum giraldii (C.Muell.) M.Fleisch., Taxithelium laeviusculum Dixon are new records for Peninsular India.
      PubDate: 2017-01-01
      DOI: 10.14719/pst.2017.4.1.273
      Issue No: Vol. 4, No. 2 (2017)
       
  • Checklist of Mosses (Bryophyta) of Bodamalai Hills in Eastern Ghats, Tamil
           Nadu

    • Authors: R Palani, S Sahaya Sathish, T Thamizharasi, P Vijayakanth
      Pages: 49 - 54
      Abstract: Bodamalai Hills, situated on the Southern Eastern Ghats of Tamil Nadu, were explored for mosses (bryophyta) for the first time. As a result a checklist of mosses has been prepared comprising 52 species belonging to 38 genera and 21 families. The dominant families with the maximum number of species are Pottiaceae, Bryaceae, Stereophyllaceae, Sematophyllaceae and Brachytheciaceae. The dominant genera are Brachymenium and Bryum and the dominant species are Barbula javanica and Bryum capillare.
      PubDate: 2017-01-03
      DOI: 10.14719/pst.2017.4.1.278
      Issue No: Vol. 4, No. 2 (2017)
       
  • Diversity and distribution of physical dormant species in relation to
           ecosystem and life-forms

    • Authors: Ganesh K. Jaganathan, Danping Song, Baolin Liu
      Pages: 55 - 63
      Abstract: Impermeable seed/fruit coat, i.e. physical dormancy (PY) occurring only in several genera of 18 angiosperm families plays an important role in controlling seed persistence and germination timing. It has been theoretically speculated that PY is more prevalent in drylands than in moist vegetation zones, but unequivocal support for this assertion is currently unavailable. The broad objective of this contribution was to examine the distribution of PY on the various vegetation of tropics and temperate ecosystems using a data set of 13, 792 species. The number of species with PY in tropics (19%) is higher than the number of PY species in the temperate ecosystem (15%). However, in both tropics and temperate, there is a clear trend that PY is less common in moist and low-temperature vegetation zones compared with dry and high-temperature vegetation. In tropics, PY is more prevalent in dry woodlands (33%) and tropical deciduous forests (27.3%) compared with the evergreen rain forest (9%). Similarly, in the temperate zone, dry vegetation with seasonal rainfall such as Matorral (22.3) and deserts (19.5%) have a higher number of PY species compared with moist warm woodlands (8.1%) and deciduous forest (9%). Although PY is a trait found in various life-forms, it appears to be less common in trees, particularly of the temperate zone. We discuss the ecological adaptation of PY in the dry ecosystem and consider the mechanism of persistence and dormancy break in PY and physiological dormant (PD) species.
      PubDate: 2017-04-01
      DOI: 10.14719/pst.2017.4.2.293
      Issue No: Vol. 4, No. 2 (2017)
       
  • Leucobryum aduncum var. scalare (Leucobryaceae: Bryophyta) - new to the
           Eastern Ghats

    • Authors: P. M. Biju, Albert Ebenezer Dulip Daniels
      Pages: 64 - 67
      Abstract: Leucobryum aduncum var. scalare, so far known from the Northeast and the Western Ghats for India, is added here to the moss flora of the Eastern Ghats. A detailed description with figures substantiated by a photo plate and a key to distinguish the species of Leucobryum Hampe from the region.
      PubDate: 2017-04-05
      DOI: 10.14719/pst.2017.4.2.295
      Issue No: Vol. 4, No. 2 (2017)
       
  • Anti-platelet aggregation effects of extracts from Arbutus unedo leaves

    • Authors: Mohammed El Haouari, Hassane Mekhfi
      Pages: 68 - 74
      Abstract: It is well known that platelet hyperactivity is a risk factor for cardiovascular diseases such as atherosclerosis, stroke and myocardial infarction. This study aimed to examine the effects of extracts enriched in flavonoids obtained from Arbutus unedo leaves on platelet aggregation. Rat platelets were prepared and incubated in vitro with different doses of the tested extracts, and aggregation was trigged by physiological agonists. Platelet treatment with increasing concentrations (0.1 - 1 mg/ml) of diethyl ether extract (genins = free flavonoids) or ethyl acetate extract (hetrosidic flavonoids) inhibited platelet aggregation evoked by thrombin in a concentration-dependant manner. The IC50 values were 0.22 ± 0.03 and 0.36 ± 0.05 mg/ml for genins and heterosidic flavonoids respectively. Treatment with Arbutus unedo extracts also significantly reduced the initial rate of platelet aggregation. At 1 mg/ml, the rate inhibition was 97.8 ± 0.74 and 90.8 ± 1.55 % for genins and heterosidic flavonoids respectively. In addition, flavonoids significantly inhibited platelet aggregation induced by ADP, collagen or epinephrine. We conclude that Arbutus unedo extracts show antiaggregant effects due mainly to flavonoids. These results may partly explain the traditional use of Arbutus unedo leaves for the treatment of cardiovascular disorders such as hypertension.
      PubDate: 2017-05-06
      DOI: 10.14719/pst.2017.4.2.298
      Issue No: Vol. 4, No. 2 (2017)
       
  • Three new additions to the grass (Poaceae) flora of Manipur, India

    • Authors: Kangjam Tilotama Devi, Potsangbam Kumar Singh, Debjyoti Bhattacharyya
      Pages: 272 - 281
      Abstract: Three grass species viz., Avena fatua L., Chrysopogon zizanioides (L.) Roberty and  Digitaria violascens Link (Poaceae, nom. alt. Gramineae) are reported here for the first time from Manipur (India) as new records to the state. A key to the identification of species along with detail description and illustrations is provided to facilitate their easy identification.
      PubDate: 2016-07-21
      Issue No: Vol. 4, No. 2 (2016)
       
  • Biosorption of Mn (II) by Spirogyra verrucosa collected from Manganese
           Mine Water

    • Authors: Shailesh Rambhau Bansod, P B Nandkar
      Pages: 282 - 292
      Abstract: Mining industries frequently generates acid mine drainage (AMD) either by its operating or abandoned mines which are often characterized by an elevated levels of certain heavy metals, sulphate, low pH and some other toxic impurities in mine water creates environmental and ecological problems. Present study planned to suggest role of alga Spirogyra verrucosa in Manganese (Mn) removal by biosorption process from the mine water of Manganese mines of Nagpur District, Vidarbha Region, Maharashtra. The biosorption of Mn(II) ions from aqueous solution by using dead green algal (S.verrucosa) biomass was investigated by studying effect of pH, temperature, quantity of biosorbent, contact time as well as initial metal ion concentration. The optimized values obtained with respect to these parameters clearly indicates that pH 5, temperature 30°C, biosorbent quantity 1.0 gm/l, contact time 120 min. and initial metal ion concentration 50mg/l were the basic requirement for the biosorption of Mn(II) ions by dead algal biomass. Also, the biosorption kinetic and isotherm modeling applied to the equilibrium data for biosorption of Mn(II) ions onto alga reveals the fitness of the pseudo-second-order rate expression (R2=0.994) as well as the suitability of Langmuir (R2=0.859) and Freundlich (R2=0.761) isotherm models with an indication of the applicability of this metal ion-dried algal system for removal of Mn(II) ions in a monolayer biosorption as well as heterogenous surface conditions. However, comparatively biosorption equilibrium was better described by Langmuir isotherm model with monolayer biosorption capacity of S.verrucosa biomass 21.80 mg/g. Also, the maximum removal 40.66 mg/g (80.20%) of Mn(II) ion by alga under optimized conditions promises the potential use in mine water treatment technology.
      PubDate: 2016-08-03
      Issue No: Vol. 4, No. 2 (2016)
       
  • Correlation coefficients, path analysis and disease reaction between yield
           and yield components in Potato (Solanum tuberosum L.) genotypes in Bale,
           South Eastern Ethiopia

    • Authors: Getachew Workalemahu, Wassu Mohammed
      Pages: 293 - 297
      Abstract: Study on the relationships between yield and its components will improve the efficiency of breeding programmes by determining appropriate selection criteria. An investigation was carried out on 24 potato genotypes to find out the association among yield, yield components and their direct and indirect effects on tuber yield of potato. The experiment was laid out in randomized complete block design with three replications at Sinana Agricultural Research Center. The association was analyzed by correlation coefficient, and further subjected to path analysis to estimate direct and indirect effects of each character on tuber yield. Positive and significant genotypic and phenotypic correlation were found between total tuber yield and marketable tuber yield (rg=0.99), leaf area index (rg=0.82), plant height(rg=0.56), stem number per plant(rg=0.56), average tuber weight (rg=0.74)  and biomass yield (rg=0.69). Path analysis of tuber yield and its components shows that marketable tuber yield and average tuber weight had maximum positive direct genotypic and phenotypic effect on total tuber yield indicating their importance in selection for tuber yield improvement.
      PubDate: 2016-08-03
      Issue No: Vol. 4, No. 2 (2016)
       
  • Phytoextraction of cadmium and lead by three vegetable-crop plants

    • Authors: Syed Yakub Ali, Sambhu Nath Banerjee, Shibani Chaudhury
      Pages: 298 - 303
      Abstract: Phytoextraction, is an effective and promising means to cure soil contamination with heavy metals. The present study investigates the ability of three vegetables plants for removal of heavy metals from the contaminated soil and metal mobilization to different plant parts. The three plants selected for the study, Momordica charantia, Vigna unguiculata and Solanum melongena were grown for 90 days in soils artificially contaminated with cadmium (Cd) and lead (Pb) (50mg metal/kg of soil). The concentrations of the two metals were observed to be higher in roots of M. charantia and V. unguiculata than in soil, but root Pb level of S. melongena was slightly lower than that of soil after 90 days. Translocation potential of the heavy metals indicated higher accumulation of Cd in roots of M. charantia and S. melongena than in leaves while the pattern was completely opposite in V. unguiculata.  Lead accumulation was higher in roots than in leaves for all the three plant species studied. The Translocation Factor (TF) of Cd for the three plants was in the range of 1.16 to 2.29 whereas, TF values of Pb remained <1, indicating that only small amount of Pb was translocated from roots to aerial parts. 
      PubDate: 2016-08-15
      Issue No: Vol. 4, No. 2 (2016)
       
  • Cassava: meeting the global protein need

    • Authors: Vasavi Rama Karri, Nirmala Nalluri
      Pages: 304 - 311
      Abstract: Cassava (Manihot esculenta Crantz) is a nutty flavored, starch-tuber perennial woody shrub originated from tropical America belongs to Euphorbiaceae family of plants. After rice and maize, it is considered as the third largest source of carbohydrate food in the tropics and its sweet, chewy underground tuber is one of the popular edible root-vegetables. It is ranked as a 21st century crop, as it acknowledges to the universal economy trends and climatic changes. Currently, use of cassava leaves as a potential source of protein, vitamins and minerals was reviewed. The effect of malnutrition on health and development of people and its control by using cassava leaves as a protein rich source were briefly discussed. Cascade use of cassava leaves, in industrial applications like natural filler for potential reinforcement of polypropylene based composites was also presented. Although, cassava leaves are vital source of essential nutrients, their anti-nutrients and cyanogenic glucosides content limits their consumption, which can be overcome by the development of an efficient, simple and low-cost processing methods for protein extraction from cassava leaves. There are supporting evidences for efficacy of cassava leaf protein in reducing the effect of malnutrition by the intake of protein rich cassava leaves, fortified with various common food items. So consumption of cassava leaves enriched with high protein, vitamin and mineral contents with the development of suitable processing technology to remove anti-nutrients can be an alternative source to meet the global protein demand.
      PubDate: 2016-08-30
      Issue No: Vol. 4, No. 2 (2016)
       
  • Effects of different factors influencing the essential oil properties of
           Thymus vulgaris L.

    • Authors: Zsuzsanna Pluhár, Dóra Szabó, Szilvia Sárosi
      Pages: 312 - 326
      Abstract: Thymus vulgaris L. is a well-know medicinal and aromatic plant native to the Mediterranean region. The essential oil is considered as the main active constituent, being responsible for its typical odour and taste as well as for several therapeutic effects. Our aim was to demonstrate the most important factors influencing the quality and quantity parameters of thyme oil by summarizing the available literature data and our own scientific results. Genetic background, climatic and growing conditions, techniques of primary processing, storage conditions as well as different extraction methods have proven effects on the essential oil properties and, as a consequence, on its biological activity, either.
      PubDate: 2016-09-18
      Issue No: Vol. 4, No. 2 (2016)
       
  • Acute consumption of Peppermint and Chamomile teas produce contrasting
           effects on cognition and mood in healthy young adults

    • Authors: Mark Moss, Robert Jones, Lucy Moss, Richard Cutter, Keith Wesnes
      Pages: 327 - 336
      Abstract: This study aimed to assess the acute effects of Peppermint and Chamomile herbal teas on cognitive performance and mood in healthy young adults.  A single factor independent groups design was employed.  One hundred and eighty undergraduate students volunteered to take part in the study for which they received course credit.  Participants were randomly allocated to one of three treatments: Peppermint tea, Chamomile tea or hot water (Control).  Mood scales were completed and participants then consumed their drink over a ten minute period and rested for twenty minutes.  Cognitive performance was assessed using a tailored version of The Cognitive Drug Research (CDR) computerised assessment system.  Post testing mood scales were then completed.  Data were analysed using independent groups ANOVAs followed by Tukey post hoc comparisons.  The analysis revealed that Peppermint tea significantly improved long term memory and speed of memory compared to both Chamomile and control treatments.  Chamomile tea significantly slowed speed of attention and impaired working memory compared to the Peppermint treatment.  Peppermint tea significantly increased subjective alertness compared to the Chamomile and control conditions.  Chamomile significantly increased subjective calmness compared to the Peppermint treatment.  The data show that acute consumption of Peppermint and Chamomile teas can impact on cognition and mood in healthy adults in contrasting directions.  The enhancing and arousing effects of Peppermint and calming/sedative effects of Chamomile observed are in keeping with the purported properties of these herbs and suggest beneficial effects can be drawn from their use.
      PubDate: 2016-09-30
      Issue No: Vol. 4, No. 2 (2016)
       
  • Assessment of Pteridophyte Diversity and their Status in Gujarat State,
           Western India

    • Authors: Kishore S Rajput, Ronak N Kachhiyapatel, Suresh K Patel, Vinay M Raole
      Pages: 337 - 348
      Abstract: An intensive field survey was carried out from the hilly regions, plains of different climatic regimes and agricultural land of Gujarat state. About 23 species were collected from Gujarat state, from which eight species viz., Actiniopteris radiata (Sw.) Link, Adiantum caudatum L., A. incisum Forssk., Lygodium flexuosum (L.) Sw., Pteris vittata L., Selaginella ciliaris (Retz.) Spring, S. delicatula (Desv. ex Poir.) Alston, and S. repanda (Desv. ex Poir.) Spring. were added as new distributional record for the Gujarat state. Increasing anthropogenic pressure, destruction of forest ecosystem and development of infrastructure facilities including road widening and rainwater harvesting program by deepening of the natural ponds are additional reasons for declining terrestrial and aquatic pteridophyte diversity respectively. Our survey concludes that E. debile is regionally extinct in the wild while Isoetes coromandeliana, will be lost from its natural habitat in short time if not conserved properly. Therefore, there is an urgent need of in situ conservation by developing action plans in collaboration with the state forest department.
      PubDate: 2016-10-01
      Issue No: Vol. 4, No. 2 (2016)
       
  • Two new records for the flora of Vietnam: Sonerila (Melastomataceae) and
           Erycibe (Convolvulaceae)

    • Authors: Son Van Dang, Hong Quan Nguyen, Hong Dung Pham, Van Ngot Pham, Truong Mai, Nghia Son Hoang
      Pages: 349 - 353
      Abstract: Two recently discovered species from Phu Quoc National Park in southern Vietnam, Sonerila bokorense S.H. Cho and Y.D. Kim (Melastomataceae) and Erycibe citriniflora Griff. (Convolvulaceae), provide new records for the flora of Vietnam. For each species a taxonomic description is presented, together with information on their distribution, habitat and ecology; color photographs of both species are also given.
      PubDate: 2016-10-01
      Issue No: Vol. 4, No. 2 (2016)
       
  • Diversity and Distribution of liverworts across habitats and altitudinal
           gradient at Pachmarhi Biosphere Reserve (India)

    • Authors: Reesa Gupta, Ashish Kumar Asthana
      Pages: 354 - 359
      Abstract: The present study elucidates the distribution of liverworts (Marchantiophyta) in various habitats and across the altitudinal gradients at Pachmarhi Biosphere Reserve (PBR), central India. The liverwort diversity was assessed in selected habitats at each site viz. soil, wet rocks, dry rocks, soil covered rocks, stony walls (terricolous habitats) and epiphytic habitat. Three altitudinal gradients were considered for distributional assessment. In all, 41 liverworts belonging to 21 genera and 15 families were encountered. Among the three altitudinal zones, 17 taxa were found at lower altitudinal gradient (400-800 m) whereas 12 liverworts were found at the higher altitudinal gradient (1001-1400 m). Maximum taxa (33) were present at the middle altitudinal zone (801- 1000 m). The sites at middle altitudes furnished amicable conditions for the growth of bryophytes. In general, rocks, both moist and dry formed the most pertinent habitat for the liverworts. Evidently, the middle altitudinal gradient emerged as the altitudinal range harbouring maximum liverworts.
      PubDate: 2016-10-01
      Issue No: Vol. 4, No. 2 (2016)
       
  • In silico and in vitro assessment on antidiabetic efficacy of secondary
           metabolites from Syzygium cumini (L.) Skeels

    • Authors: Twinkle Sunder Bansode, Amit Gupta, B K Salalkar
      Pages: 360 - 367
      Abstract: India ranks high for prevalence of diabetes and the treatment of diabetes without any side effects is still challenging. Though herbal remedies help reduce the side effect, proper standardization of phytochemical which prove as a bioactive compound, its proper dose and clinical trials are lacking. In our investigation, we studied the binding mechanism of the secondary metabolites of Syzygium cumini, their in vitro antidiabetic activity and the number of phytochemicals present. In silico study revealed that ellagic acid has a potential to modulate the carbohydrate metabolizing enzyme activity showing higher affinity for the enzymes with much lesser binding energy, -4.73 kcal/mol for alpha amylase, -4.87 kcal/mol for beta-glucosidase, -4.79 kcal/mol for glycogen synthase kinase, -4.18 kcal/mol for glucokinase and -4.49 kcal/mol for alpha-glucosidase. In vitro-Alpha amylase inhibitory activity assay showed that ethanol extract has the highest value of percent inhibition (73.33%) as compared to standard drug Acarbose (65.99%). Finally, TLC analysis cleared that ethanol extract contains five compounds one of which may be a bioactive compound, ellagic acid. Further purification and characterization of the ellagic acid is needed.
      PubDate: 2016-10-24
      Issue No: Vol. 4, No. 2 (2016)
       
 
 
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