Vol. 7, Issue 5 (2019)
Effect of high temperature stress on physiological attributes and anti-oxidative defense mechanism in wheat (Triticum aestivum L.)
Author(s): Aarif Khan, NK Gupta, M Rizwan and Govind Singh
Abstract: Experiment was conducted to study the effect of heat stress on various parameters in five diverse wheat (Triticum aestivum L.) genotypes at seedling stage. Seeds were sown in plastic pots in laboratory at 25±2 °C. For heat treatment, 20 days old seedlings were exposed to 36 °C/42 °C for 6 hours. Results showed that the heat stress significantly reduced the dry weight and length of seedlings in all the genotypes. Chlorophyll content and membrane stability index decreased but proline content increased in all the genotypes under stress conditions. Among genotypes, Raj 4083 exhibited better heat tolerance, particularly at 42 °C. Activities of SOD, CAT, APX and POX increased significantly in all the genotypes but per cent enhancement was maximum in Raj 4083 and minimum in PBW 502. The study also provides evidence that antioxidant enzymes like SOD, CAT, GPX, APX have association with heat tolerance in wheat and thus can be used as efficient markers for heat tolerance at seedling stage.
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How to cite this article:
Aarif Khan, NK Gupta, M Rizwan, Govind Singh. Effect of high temperature stress on physiological attributes and anti-oxidative defense mechanism in wheat (Triticum aestivum L.). Int J Chem Stud 2019;7(5):2183-2187.
