Effects of exogenous auxin on physiological and biochemical characteristics of soybean under PEG simulated drought stress

doi:10.14088/j.cnki.issn0439-8114.2019.06.004

Abstract

Abstract: Several physiological and biochemical indexes changes of soybean seedlings treated with exogenous auxin （IAA） under PEG-6000 simulated drought stress were studied. The results showed that drought stress could significantly reduce the contents of chlorophyll a, chlorophyll b and total chlorophyll, while IAA could significantly increase the contents of chlorophyll a, chlorophyll b and total chlorophyll. Drought stress significantly increased MDA content, while IAA significantly decreased MDA content. Drought stress significantly decreased AsA content and increased GSH content; IAA also significantly increased GSH content. Under drought stress, the activities of CAT, SOD, POD and AsA-POD of soybean were increased, and the antioxidant capacity of soybean was enhanced. IAA significantly increased SOD, POD and AsA-POD activity. It is concluded that IAA treatment could enhance the resistance of soybean seedlings to drought stress.

Key words: drought stress, soybean plants [Glycine max （Linn.） Merr.）], IAA, chlorophyll, MDA

CLC Number:

S565.1

WU Zheng-lin, ZHANG You-zhi. Effects of exogenous auxin on physiological and biochemical characteristics of soybean under PEG simulated drought stress[J]. HUBEI AGRICULTURAL SCIENCES, 2019, 58(6): 16-19.

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