Variable antioxidative responses to salt (NaCl) stress among seven different sesame (Sesamum indicum L.) varieties

By : R. Desingh, G. Kanagaraj

Page No: 237-244

Abstract :
Antioxidant characteristics were determined in seven sesame (Sesamum indicum L.) varieties (PAIYUR-1, SVPR-1, TMV-3, TMV-4, TMV-5, VIR-1 and VIR-2) subjected to salt stress of different concentrations (0, 40, 80 and 120mM) as a basal dose and sampling was done in leaves on 30th Days After Treatment (DAT). Leaf extracts of TMV-3 showed higher antioxidant enzyme activities (SOD, CAT, GR, APX and POD), while the lowest activities were recorded with PAIYUR-1. Lower rates of membrane lipid peroxidation and electrolytic leakage were noticed in the leaves of TMV-4 under salt stress. The leaves of TMV-3 and TMV-4 accumulated more proline, glycine betaine and abscisic acid under salt stress while lower content in PAIYUR-1 and VIR-1. Our data revealed that among seven sesame varieties TMV-3 and TMV-4 have efficient antioxidative characteristics which could provide better protection against oxidative stress in leaves under salt stressed conditions.

Authors:
R. Desingh and G. Kanagaraj
Department of Botany, Annamalai University, Chidambaram,Tamil Nadu-608 002, India

DOI: https://doi.org/10.32381/JPSR.2020.36.1-2.30