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首页> 外文期刊>Russian Journal of Plant Physiology >Combined Action of Salicylic Acid and Thiourea Alleviated Heat Stress in Maize by Stimulating Varied Antioxidant Response in Tissues
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Combined Action of Salicylic Acid and Thiourea Alleviated Heat Stress in Maize by Stimulating Varied Antioxidant Response in Tissues

机译：Combined Action of Salicylic Acid and Thiourea Alleviated Heat Stress in Maize by Stimulating Varied Antioxidant Response in Tissues

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摘要

The combined effect of salicylic acid (SA) and thiourea (TU) on antioxidative response was determined in maize (Zeamays L.) exposed to high temperature stress. Among the varied concentrations used, 200 mu M SA + 9 mM TU improved seedling growth in CML 32 (relatively tolerant towards high temperature) and LM 11 (relatively susceptible towards high temperature) genotypes. The increased activities of ascorbate peroxidase (APX) and glutathione reductase (GR) in the roots of CML 32 and shoots of LM 11 seedlings may indicate that SA + TU application induced Halliwell-Asada pathway in these tissues. It might be also suggested that H2O2 detoxification was primarily carried out by SA + TU induced catalase (CAT) and peroxidase (POX) activities in the roots of LM 11 and shoots of CML 32 seedlings. With foliar spray of SA + TU, proline content increased in roots of both the genotypes that might help the maize genotypes in combating heat stress by maintaining osmotic adjustments or by acting as an antioxidant. The contents of H2O2 and malondialdehyde (MDA) decreased in the roots and shoots of foliar sprayed seedlings of both the genotypes.

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