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| Regulation of H2S on Cd-induced osmotic stress in roots of Chinese cabbage seedling |
| Received:September 08, 2015 |
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| KeyWord:H2S;cadmium;osmoticum;proline;soluble sugar |
| Author Name | Affiliation | E-mail | | ZHANG Li-ping | School of Life Science, Shanxi University, Taiyuan 030006, China | | | LIU Zhi-qiang | School of Life Science, Shanxi University, Taiyuan 030006, China | | | JIN Zhu-ping | School of Life Science, Shanxi University, Taiyuan 030006, China | | | LIU Dan-mei | School of Life Science, Shanxi University, Taiyuan 030006, China | | | QIAO Zeng-jie | School of Life Science, Shanxi University, Taiyuan 030006, China | | | FANG Hui-hui | School of Life Science, Shanxi University, Taiyuan 030006, China | | | DU Xin-zhe | School of Life Science, Shanxi University, Taiyuan 030006, China | | | PEI Yan-xi | School of Life Science, Shanxi University, Taiyuan 030006, China | peiyanxi@sxu.edu.cn |
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| Abstract: |
| Hydrogen sulfide has showed the potential to enhance the resistance of plants to environmental stresses. In this study, regulation of gas transmitter H2S on the cell membrane permeability and the osmoticum in roots of Chinese cabbage seedings under Cd stresses was investigated. Cadmium stresses caused lipid peroxidation excessive accumulation in a time-and concentration-dependent manner, leading to higher relative conductivity and greater membrane permeability in cabbage root cells. Pretreatments with 1, 5, and 10μmol·L-1 NaHS, donor of H2S, significantly reduced the relative conductivity increased by Cd stresses and increased water content in the roots. Under Cd stresses, the content of soluble sugar and proline was improved by the fumigation with NaHS, but was reduced by H2S synthesis inhibitor HA pretreatment. The present finding indicate that H2S alleviates Cd toxicity mainly through promoting the synthesis of soluble sugar and proline and then balancing the Cd-induced osmotic stress in cabbage seedling roots. |
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