| Effects of salt stress on cell membrane permeability and physiological property in woody saltbush |
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| DOI：10.7606/j.issn.1000-7601.2007.04.44 |
| Key Words: salt stress chenopodiaceae membrane permeability MDA SOD CAT POD |
| Author Name | Affiliation | | WANG Yu-chao | College of Resources and Environment, Northwest A & F University, Yangling, Shannxi 712100, China | | WANG DE-xiang | College of Resources and Environment, Northwest A & F University, Yangling, Shannxi 712100, China
College of Forestry, Northwest A &F University, Yangling, Shannxi 712100, China | | PENG Shao-bing | College of Forestry, Northwest A &F University, Yangling, Shannxi 712100, China | | HE Fan | College of Resources and Environment, Northwest A & F University, Yangling, Shannxi 712100, China | | YU Ge | College of Resources and Environment, Northwest A & F University, Yangling, Shannxi 712100, China | | WANG Xiao-lan | College of Resources and Environment, Northwest A & F University, Yangling, Shannxi 712100, China |
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| Abstract: |
| In this experiment, the effects of NaCl and Na2SO4 stress on cell membrane permeability and physiological property were studied in two-year seedlings of three cultivars of Atriplex gardneri, Atriplex tridentate and Hippophae rhamnoides. The seedlings were grown in pots and treated with three NaCl and Na2SO4 concentrations: 4，8，12 g/kg. The result showed that, at different NaCl salt stress treatment, the activities of SOD,POD and CAT were increased for Atriplex gardneri, but MDA and cell membrane permeability had no changes. The activities of SOD and MDA were increased and the activities of CAT and POD were decreased for Atriplex tridentate. The activities of SOD, POD and CAT were decreased and cell membrane permeability and MDA were increased obviously for Hippophae rhamnoides. At the different Na2SO4 salt stress treatment, the activity of CAT was increasing first and then decreasing with salinity content rising SOD and POD were increased for Atriplex gardneri. There were no changes of MDA and the membrane permeability. The activity of SOD was increased and POD,CAT were decreased for Atriplex tridentate. It had higher enzyme activity in Na2SO4 treatment than the same level of NaCl treatment. The content of MDA had no changes. The membrane permeability and MDA were rising but the range was smaller than with the same level of NaCl treatment for Hippophae rhamnoides. The activities of SOD,CAT and POD were decreased in Na2SO4 stress treatment except POD was increased in the level of 4 g/kg treatment. Therefore, these results indicated that Atriplex gardneri and Atriplex tridentate had higher antioxidant levels and greater salt-tolerance ability than Hippophae rhamnoides. Atriplex gardneri had strong ability for NaCl salt-tolerance, while Atriplex tridentate had strong ability for Na2SO4 salt-tolerance. |
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