Water relations on Alhagi sparsifolia in the southern fringe of Taklamakan Desert

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	Water relations on Alhagi sparsifolia in the southern fringe of Taklamakan Desert
	Li, XY ; Zhang, XM ; Zeng, FJ ; Foetzki, A ; Thomas, FM ; Li, XM ; Runge, M ; He, XY
刊名	ACTA BOTANICA SINICA
	2002
卷号	44 期号:10 页码:1219-1224
关键词	Alhagi sparsifolia water relation drought stress water potential PV parameters irrigation effect
ISSN号	0577-7496
通讯作者	Li, XY, Chinese Acad Sci, Xingjiang Inst Ecol & Geog, Urumqi 830011, Peoples R China
中文摘要	Water relations of Alhagi sparsifolia Shap. at the transition zone between oases and sandy desert were studied in the southern fringe of Taklamakan Desert. Results showed that A. sparsifolia maintained the positive turgor during the summer. The steady high predawn water potential (psi(P)) indicated A. sparsifolia had sufficient hydration and water supply in growing season. In July, water deficit caused by drought stress had no effect on the transpiration of A. sparsifolia. Therefore, drought stress is not a main factor affecting the survival of plants. The physiological adaptation to drought of A. sparsifolia was shown mainly at the leaf level by significant difference (DeltaII) and relative water content (RWC) between the osmotic pressure at full turgor and at turgor loss, by occurring of osmotic adjustment, by high percentage of dry mass-related water content ( WCsat), by RWC at turgor loss point ( RWCp) in stable level and low RWC of the saturated symplast (RWCsym). However, the morphological features of transpiring surface reduction and deep root system seem to be the main way for the plant to adapt to the extreme drought environment. Result also suggests that one time of irregular irrigation in summer will not be helpful to recover water status of A. sparsifolia in location where the water table is very low.
学科主题	Biochemistry & Molecular Biology; Plant Sciences
收录类别	SCI
语种	英语
WOS记录号	WOS:000178760000015
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/55459]
专题	沈阳应用生态研究所_沈阳应用生态研究所_期刊论文
推荐引用方式 GB/T 7714	Li, XY,Zhang, XM,Zeng, FJ,et al. Water relations on Alhagi sparsifolia in the southern fringe of Taklamakan Desert[J]. ACTA BOTANICA SINICA,2002,44(10):1219-1224.
APA	Li, XY.,Zhang, XM.,Zeng, FJ.,Foetzki, A.,Thomas, FM.,...&He, XY.(2002).Water relations on Alhagi sparsifolia in the southern fringe of Taklamakan Desert.ACTA BOTANICA SINICA,44(10),1219-1224.
MLA	Li, XY,et al."Water relations on Alhagi sparsifolia in the southern fringe of Taklamakan Desert".ACTA BOTANICA SINICA 44.10(2002):1219-1224.