Hydrogen sulfide protects soybean seedlings against drought-induced oxidative stress |
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| Authors: | Hua Zhang Hao Jiao Cheng-Xi Jiang Song-Hua Wang Zhao-Jun Wei Jian-Ping Luo Russell L Jones |
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| Institution: | (1) School of Biotechnology and Food Engineering, Hefei University of Technology, 230009 Hefei, Anhui, China;(2) Department of Plant and Microbial Biology, University of California at Berkeley, Berkeley, CA 94720, USA;(3) Institute of Subtropical Crop Zhejiang Province, 325005 Wenzhou, China;(4) Life Science College, Anhui Science and Technology University, 233100 Bengbu, China |
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| Abstract: | Increasing evidence indicates that hydrogen sulfide (H2S) is the third “gas signal molecule” after NO and CO in animal. In the present study, we found that soybean (Glycine max L.) seedlings sprayed with exogenous H2S donor NaHS prolonged the longer survival time of life, and enlarged higher biomass of both leaf and root than in non-sprayed
controls under continuous drought stress. With the continuous drought stress, the content of chlorophyll in the leaves of
both Xu-1 and Xu-6 cultivar of soybean decreased dramatically. The drought-induced decrease in chlorophyll could be alleviated
by spraying H2S donor. It was also shown that spraying with H2S donor dramatically retained higher activities of superoxide dismutase (SOD, EC 1.1.5.1.1), catalase (CAT, EC1.11.1.6) and
lower activity of lipoxygenases (LOX, EC 1.13.11.12), delayed excessive accumulation of malondialdehyde, hydrogen peroxide,
and superoxide anion (O2·−) compared with the control. These results suggest that H2S can increase drought tolerance in soybean seedlings by acting as an antioxidant signal molecule for the response. |
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