Author(s):

M Arumugaperumal and KB Sujatha

Abstract: Tomato (Solanum lycopersicon) is one of the most important and widely grown vegetables crops in both temperate and tropical regions of the world. Global climate models projects an increase in temperature of 0.6–4.8ºC that is anticipated to be one of the limiting factors for cultivation of tomato and other plants in the future. In this study, plants were grown under two different temperature regimes, one at ambient (30 °C) and other at elevated temperature (38±1ºC) in open top chambers at the Department of Crop Physiology, Tamil Nadu Agricultural University, Coimbatore. The antioxidant enzyme activity of catalase (CAT), peroxidase (POX) and super oxide dismutase (SOD) of 20 tomato genotypes to elevated temperature were evaluated. The present study revealed that the genotype IIVR – L showed a higher activity of catalase (CAT), peroxidase (POX) and superoxide dismutase (SOD) and their activity was lowest in IIHR-709 and IIHR-2388. The genotype IIVR-L with higher accumulation of antioxidant enzymes was able to detoxify reactive oxygen species and mitigate oxidative stress-induced damage under elevated temperature whereas it was low in IIHR-709 and IIHR-2388 which was evident from the better yield in IIVR-L compared to the poorly performed genotypes (IIHR-2388 and IIHR–709)

Pages: 804-809  |  967 Views  195 Downloads

Download (537KB)