| Effects of water stress on the system of defense enzymes and RWC of Amygdalus pedunculata leaves |
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| DOI：10.7606/j.issn.1000-7601.2006.06.23 |
| Key Words: Amygdalus pedunculata Pall. water stress RWC membrane electrolyte leakage defense enzymes |
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| Abstract: |
| Amygdalus pedunculata seedlings were treated with PEG-6000 solutions of different concentrations to imitate drought stress.The changes of relative water content and the membrane lipid peroxidation of leaves were studied.The results showed that the RWC decreased,whereas both the MDA content and the permeability of plasma membrane increased with the increase of PEG concentration.But in the early period of the treatment the changes were not obvious.POD activity showed decreasing first and then increasing.CAT activity increased at first and then decreased.SOD activity showed the same as POD under the light and middle concentration of the PEG drought stress.But it decreased at last under the stronger drought stress.The activities of the SOD 、POD and CAT were all higher than that of the CK treatments except the stronger drought stress.All this suggested that the Amygdalus pedunculata has strong ability to fight a drought. |