Department of Botany

Permanent URI for this communityhttps://ir.nbu.ac.in/handle/123456789/4383

Since establishment in 1984, the department flourished with tireless efforts of faculties, staff and students. The course curriculum of the department has always been strong and forward looking. Syllabi have been revised regularly and the latest version was done with the introduction of semester system offering five special papers, namely Cytogenetics, Microbiology, Molecular Plant pathology and Fungal Biotechnology, Plant Biochemistry and Taxonomy of Angiosperms and Biosystematics.

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Author: search.filters.author.Chakraborty, USubject: search.filters.subject.Antioxidative enzymes

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    Heat acelimation and chemical pre-treatments induccd thermotolerancc in chickpea
    (University of North Bengal, 2009-03) Tongden, C; Chakraborty, U
    Induced 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.