NBU Journal of Plant Sciences
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The NBU Journal of Plant Sciences serves as the official organ of the Department of Botany for the publication of research papers by its members and researchers. The journal is sent free to its members and different academic institutions on demand.
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Item Open Access Bacillus megaterium mediated growth promotion and biological control of crown rot disease of Oncidium incited by Sclerotium rolfsii Sacc.(University of North Bengal, 2022-03) Basnet, M; Tongden, C; Chakraborty, U; Chakraborty, BNPlant viruses cause severe diseases leading to enormous crop loss. The present day viral researches of economic plants are centered on identification of virus, molecular characterization and management of viral discases. Till date more than thousand viruses have been classified into several families. It is desirable to know about the different virus families along with their type genus and/or important genus. But due to an enormous volume of literature published on this aspect, it becomes difficult to study all of them. Hence the present review has highlighted the salient features of the major plant viruses which have been classified at the family level. Most of the virus families have been discussed with important/type genus of each family. Some viruses which could not be placed in any family have been grouped as 'no family". Importance of molecular data, immunological data and data on protein configuration of coat proteins along with bioinformatics and its predictive power have been highlighted.Item Open Access Time-course accumulation of metabolites and expression of antioxidative enzymes in Glycine max under temperature stress(University of North Bengal, 2010-03) Pradhan, D; Chakraborty, UThe development of molecular techniques for genetic analysis has led to a great increase in our knowledge of plant genetics and our understanding of the structure and behaviour of plant genome. During last three decades, several powerful DNA based marker technologies have been developed for the assessment of genetic diversities and molecular marker assisted breeding technology. In plant systems, the prospects of DNA profiling and fingerprinting is becoming indispensable in the context of establishment of molecular phylogeny, assessment of somaclonal variants, characterization of plant genomics, marker- based gene tags, map-based cloning of agronomically important genes, variability studies, synteny mapping, marker-assisted selection of desirable genotypes etc. In this review article, various molecular markers are reviewed with emphasis on specific areas of their application in higher plants.Item Open Access Heat acelimation and chemical pre-treatments induccd thermotolerancc in chickpea(University of North Bengal, 2009-03) Tongden, C; Chakraborty, UInduced heat-tolerance triggered by heat acclimation treatment and foliar application of salicylic acid and abscisic acid were evaluated in three different genotypes of chickpea (Cicer arietinum L.) distinctly differing in their sensitivity to heat stress. Seedlings pre-treated with 100uM salicylic acid (SA) and 50 uM abscisic acid (ABA) showed improved heat tolerance to a lethal temperature of 46°C than the untreated control seedlings. Heat stress increased lipid peroxidation of membranes and reduced plant survival. Protein and proline contents increased significantly in pre-treated seedlings. Cell membrane stability also increased remarkably in pre-treated seedlings of all three genotypes. Changes in activities of antioxidative enzymes like peroxidase, ascorbate peroxidase in pre-treated seedlings revealed increase in enzymatic activities which declined sharply at lethal temperuturc. Quantum of increase in enzymatic activity was however higher in thermotolerant genotype in comparison to heat susceptible genotype. Thermotolerant genotype also exhibited constitutively higher antioxidative activities. Catalase activity, in contrast, showed a significant decrease in its activity in pre-treated seedlings following exposure to lethal temperature. These results indicate that heat acclimation treatment and application of SA and ABA show great potential in inducing heat tolerance in chickpea seedlings and these can be further analyzed to understand their role in thermoprotection.Item Open Access Antidiabetic and anti-oxidant activity of Moringa oleifera leaf extract in streptozotocin induced diabetic rats(University of North Bengal, 2009-03) Chakraborty, U; Das, HThe effect of the aqueous extract of Moringa oleifera Lamk. leaves (MOLE) in the treatment of diabetes along with its antioxidant activity in streptozotocin induced diabetic rats was determined in the current study. Oral administration of MOLEt @ 125 and 250 mg/kg for 20 days significantly prevented the STZ- induced hyperglycemia. Administration of the extracts at the dose of 250 mg/kg body weight/day resulted in a marked decrease in the levels of fasting blood glucose and urine sugar. The extract also produced a significant decrease in peroxidation products, viz.. thiobarbituric acid reactive substances. The activity of reduced glutathione and glycogen content were found to be increased in the hepatic tissue of SiZ- diabetic rats treated with MOLEL. STZ-diabetic rats treated with MOLEt significantly reversed all these changes to near normal. The MOLBt thus exhibits antidiabetic and anti-oxidative activity in STZ-induced diabetic rats.