| Protective enzyme activity and physiological properties of four mulberry varieties affected by drought stress in the Panxi Region of Sichuan Province, China |
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| 基金项目： | supported by the Key Research Program of the Education Department of Sichuan Province (Nos. 2003A–032, 072A105) |
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| 摘 要： | In order to identify the effects of drought stress on protective enzyme activity and physiological properties, four mulberry varieties, i.e.,‘Nanye-1’, ‘Yunsang-1’, ‘Xinyizhilai’ and ‘Husang-32’ in the Panxi Region of Sichuan Province, China, were selected. The activity of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) in four mulberry varieties was determined. Soluble protein, soluble sugar, proline, net photosynthetic rate and transpiration rate of mulberry leaves were analyzed. The resul...
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| 关 键 词： | 保护酶活性 四川攀西地区 干旱胁迫 生理特性 桑品种 中国 四川省 可溶性糖含量 |
| 收稿时间： | 19 March 2007 |
Protective enzyme activity and physiological properties of four mulberry varieties affected by drought stress in the Panxi Region of Sichuan Province, China |
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| Authors: | Ying-hong Ren |
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| Institution: | (1) Xichang College, Xichang, 615013, P. R. China |
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| Abstract: | In order to identify the effects of drought stress on protective enzyme activity and physiological properties, four mulberry
varieties, i.e.,‘Nanye-1’, ‘Yunsang-1’, ‘Xinyizhilai’ and ‘Husang-32’ in the Panxi Region of Sichuan Province, China, were
selected. The activity of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) in four mulberry varieties was determined.
Soluble protein, soluble sugar, proline, net photosynthetic rate and transpiration rate of mulberry leaves were analyzed.
The results show that during the early stages of drought stress, protective enzyme activities in four mulberry varieties continually
increased. However, prolonged and intensified drought stress decreased their activities. After re-watering, they gradually
returned to normal levels. Under drought stress and after re-watering, ‘Nanye-1’ and ‘Yunsang-1’ clearly showed smaller changes
in soluble protein content than the ‘Xinyizhilai’ and ‘Husang-32’ varieties, whereas changes in their soluble sugar content
were clearly greater than these last two varieties. When water deficit was protracted and intensified, ‘Nanye-1’ and ‘Yunsang-1’
still showed higher net photosynthetic, transpiration rates and water-use efficiency than ‘Xinyizhilai’ and ‘Husang-32’. |
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| Keywords: | drought stress mulberry varieties protective enzyme activity leaf quality physiology |
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