| 生物土壤与生态 |
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| Comprehensive Evaluation on Drought Resistance of Calligonum mongolicum Turcz. from Different Geographical Provenance Based on Its Response to PEG Osmotic Stress |
| QIU Zhen-jing, LI Yi, CHONG Pei-fang, SU Shi-ping |
| Forestry College, Gansu Agricultural University, Lanzhou 730070, China |
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Abstract The physiological indices such as proline (Pro), soluble sugar(SS), malondial dehyde (MDA), the activity of super oxide dismutase (SOD) and peroxide enzyme (POD) of Calligonum mongolicum Turcz. from different geographical provenance in Gansu province, namely C. mongolicum Turcz. From Jiuquan, C. mongolicum Turcz. from Zhangye, and C. mongolicum Turcz. from Wuwei, were determined under different PEG concentration treatment and their drought resistances were evaluated with membership function. Results showed that the change trend of the five indices of C. mongolicum Turcz. from the three geographical provenance were basically consistent under different PEG stress treatments, but the difference among different treatments was significant (P<0.05).The increase of Pro content under similar PEG stress followed an order of: C. mongolicum Turcz. from Wuwei>C. mongolicum Turcz. from Jiuquan>C. mongolicum Turcz. from Zhangye; SS content followed an order of: C. mongolicum Turcz. from Jiuquan>C. mongolicum Turcz. from Zhangye>C. mongolicum Turcz. from Wuwei; MDA content followed: C. mongolicum Turcz. from Wuwei>C. mongolicum Turcz. from Zhangye>C. mongolicum Turcz. from Jiuquan; SOD activity, C. mongolicum Turcz. from Wuwei>C. mongolicum Turcz. from Zhangye>C. mongolicum Turcz. from Jiuquan; POD activity, C. mongolicum Turcz. from Jiuquan>C. mongolicum Turcz. from Wuwei>C. mongolicum Turcz. from Zhangye. The drought resistance of C. mongolicum Turcz. from the three geographic provenances was ordered by C. mongolicum Turcz. from Wuwei>C. mongolicum Turcz. from Zhangye>C. mongolicum Turcz. from Jiuquan. Although the drought resistant mechanisms of C. mongolicum Turcz. from the three geographic provenances were different, the mechanism of protection enzymes adjustment was the general character of physiological reaction to the environment .
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Received: 13 January 2011
Published: 20 September 2011
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Cite this article:
QIU Zhen-jing;LI Yi;CHONG Pei-fang;SU Shi-ping. Comprehensive Evaluation on Drought Resistance of Calligonum mongolicum Turcz. from Different Geographical Provenance Based on Its Response to PEG Osmotic Stress. JOURNAL OF DESERT RESEARCH, 2011, 31(5): 1231-1237.
URL:
http://www.desert.ac.cn/EN/ OR http://www.desert.ac.cn/EN/Y2011/V31/I5/1231
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