| Effects of ozone stress on soybean roots endogenous hormones and reactive oxygen metabolism |
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| DOI：10.7606/j.issn.1000-7601.2013.04.023 |
| Key Words: soybean (Glycine max.) Ozone stress plant endogenous hormones reactive oxygen species antioxidant ability |
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| Abstract: |
| The effects of O3 concentration elevation 〔(80±10) nL·L-1〕 on soybean roots endogenous hormones and reactive oxygen metabolism was studied in this paper. Compared with the control，the elevated O3 concentration induced an increase of abscisic acid (ABA) content and Zeatin riboside (ZR) content (P＜0.05), and a decrease of growth hormone (IAA) content (P＜0.05). The balance of endogenous hormones was changed, and the specific value of IAA/ABA, AR/ABA and (IAA+ZR)/ABA was decreased (P＜0.05). The production rate of superoxide anion, the malondialdehyde (MDA) content POD activity and the proline content were increased (P＜0.05) and the SOD and CAT activity were decreased (P＜0.05). To a certain extent, ozone stress changed the soybean endogenous hormones level and balance and improved its antioxidant ability. However, constant ozone stress could cause the anti-oxidant system damage, exacerbate the membrane lipid peroxidation, and injure the soybean. |
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