Abstract
The effect of salicylic acid (SA) pretreatment on heat resistance of "Xinongyou1" rice seedlings under high temperature stress was investigated. The study shows that 0.5 mmol·L-1 SA pretreatment retards electrolyte osmosis in rice seedling, reduces malondialdehyde (MDA) content and superoxide anion radical ( O-2 ) production rate. Meanwhile, contents of hydrogen peroxide (H2O2), proline, soluble sugar, soluble protein, vitamin C and GSH in rice seedling increase with SA pretreatment under high temperature stress. The findings suggest that SA pretreatment enhances heat resistance of rice seedling.
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