Sairam, R K and Srivastava, G C and Saxsena, D C (2000) Increased antioxidant activity under elevated temperatures: a mechanism of heat stress tolerance in wheat genotypes. Biologia Plantarum, 43 (2). pp. 245-251.
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Abstract
An experiment was conducted with three wheat (Triticum aestivum L.) genotypes C 306, HD 2285 and HD 2329 (differently susceptible to water and temperature stress) to study the extent of oxidative injury and activities of antioxidant enzymes in relation to heat stress induced by manipulating dates of sowing. Increase in temperature by late sowing significantly decreased leaf relative water content (RWC), ascorbic acid content, and increased H2O2 content and lipid peroxidation in all the genotypes at 8 and 23 d after anthesis. Temperature tolerant genotypes C 306, closely followed by HD 2285 were superior to HD 2329 in maintaining high RWC, ascorbic acid content, and lower H2O2 content and lipid peroxidation (malondialdehyde content) under high temperature (late sowing) at the two stages. Activities of superoxide dismutase and catalase were highest in HD 2285 followed by C 306 and minimum in HD 2329 while ascorbate peroxidase activity was highest in C 306.
| Item Type: | Article |
|---|---|
| Official URL/DOI: | http://dx.doi.org/10.1023/A:1002756311146 |
| Uncontrolled Keywords: | ascorbic acid; ascorbate peroxidase; active oxygen species; catalase; hydrogen peroxide; oxidative stress; superoxide dismutase; temperature stress; Triticum aestivum |
| Subjects: | Agricultural Sciences and Technology > Plant Physiology |
| Divisions: | Plant Physiology |
| ID Code: | 151 |
| Deposited By: | Dr Sridhar Gutam |
| Deposited On: | 24 Jun 2010 12:43 |
| Last Modified: | 25 Jun 2010 13:13 |
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