四种灌木幼苗对水分胁迫的生理响应

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Abstract

Caragana korshinskii,C.leucophloea,C.acanthophylla and Atraphaxis virgata are four important species composed of vegetation around Urumqi,and they have a great potential in recovering degraded vegetation.In this study,physiological responses of four shrub seedlings to artificially simulated drought stress were studied.The results showed that leaf water content and chlorophyll content of four shrub seedlings decreased with increased drought stress.Proline accumulation was much more significant than soluble sugars under drought stress conditions.MDA accumulation was not significant (P>0.05) for all shrub seedlings except C.acanthophylla.Our results indicated that four shrubs can adapt to arid environments by adopting different strategies under drought stress conditions,and that drought resistance in descending order of four shrubs was C.leucophloe>C.korshinskii>A.virgata>C.acanthophylla.

Key words： shrub seedling drought stress osmotic adjustment malondialdehyde chlorophyll

Received: 25 December 2009

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	Articles by authors
	YAO Hua
	ZHAO Xiao-ying
	LI Xiao-mei
	DONG Zheng-wu

Cite this article:

YAO Hua,ZHAO Xiao-ying,LI Xiao-mei, et al. Physiological responses of four shrub seedlings to water stress[J]. , 2009, 28(6): 537-542.

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http://www.ecolsci.com/EN/ OR http://www.ecolsci.com/EN/Y2009/V28/I6/537

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