Marappan Jayanthi

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A procedure for the regeneration of complete plantlets of Tylophora indica from cultured leaf callus via somatic embryogenesis is described. Callus induction from leaf explants was on Murashige and Skoog (MS) medium with different concentrations of 2,4-dichlorophenoxyacetic acid (2.4-D; 0.03–3 mg l−1; 0.0–13.56 μM) and kinetin (Kn; 0.01 mg l−1; 0.05 μM).(More)
The discovery of GH (Glycoside Hydrolase) 19 chitinases in Streptomyces sp. raises the possibility of the presence of these proteins in other bacterial species, since they were initially thought to be confined to higher plants. The present study mainly concentrates on the phylogenetic distribution and homology conservation in GH19 family chitinases.(More)
Direct embryogenesis without an intervening callus phase from cotyledonary nodes of germinated immature zygotic embryos of hybrids viz. DG1 and DG21 of oil palm (Elaeis guineensis) is reported here. Direct embryogenesis was achieved when the cotyledonary nodes of germinated immature zygotic embryos were cultured in dark for 8 weeks on Eeuwens media (Y3)(More)
Rhododendron nilagiricum Zenk is the only paleoendemic species of Rhododendron found at Nilgiris. Random amplified polymorphic DNA (RAPD) analysis was carried out to study the extent of genetic polymorphism in trees collected from five locations at Nilgiris. Of the 15 primers tested, 10 revealed polymorphism. The percentage polymorphism ranged from 40 to 92(More)
A new series of novel some substituted tetrazole derivatives (Compounds I-V) were synthesized by tetrazole react with different types of carbazone derivatives and various substituted type of benzaldehyde. The entire resulting compounds were characterized and confirmed by IR, 1H NMR, 13C NMR, mass and elemental analysis data. The antimicrobial activity of(More)
Natural genetic variation present in two populations of the critically endangered legume C. longipes was revealed by random amplified polymorphic DNA (RAPD) analysis. Out of the 30 primers used to test the intra-specific genetic polymorphism (between individuals from isolated populations) only 21 gave amplification. Eight primers produced monomorphic bands(More)
The solution structure of a novel plant defensin (PhD1) contains a fifth disulfide bond, unlike other plant defensins, which have four disulfide bonds. The present study aims to better understand the stability, thermal dependence and the role of disulfide bonds in the tertiary structure of PhD1 using Molecular Dynamics (MD) simulations. The secondary(More)
Plant growth-promoting rhizobacteria (PGPR) are free-living, soil-borne bacteria, which enhance the growth of the plant either directly or indirectly. The direct mechanisms involve nitrogen fixation, phosphorus solubilization, HCN production, production of phytohormones such as auxins, cytokinins and gibberellins and lowering of ethylene concentration.(More)
The three-dimensional structure of a cysteine rich antifungal protein EAFP2 is found to be compact and extremely stable. The rigid nature of the protein is attributed to the presence of five disulfide bonds. However, the effect of individual disulfide bonds on the conformation has not been characterized. Thus, Molecular Dynamics (MD) simulations are used to(More)