NDLI: Water relations of four perennial plant species at the southern periphery of the Taklimakan desert

Content Provider	IEEE Xplore Digital Library
Author	XiangYi Li LiSha Lin FanJiang Zeng XiMing Zhang
Copyright Year	2011
Description	Author affiliation: Xinjiang Institute of Ecology and Geography, ChineseAcademy of Sciences, Urumqi 830011, China (XiangYi Li; LiSha Lin; FanJiang Zeng; XiMing Zhang)
Abstract	The investigations started from the assumption that perennial plants in the foreland of river oases in the Taklimakan desert are able to take up water from soils of low water content and low water potential during long drought periods. In order to check this assumption, P-V curves were established and selected water relation parameters were derived. Alhagi sparsifolia, Calligonum caput-medusae, Tamarix ramosissima, and Populus euphratica, growing in the foreland of Qira oasis were investigated. Contrary to the expectation, the osmotic potentials both at plant water saturation and at incipient plasmolysis are high in comparison with other desert plants and reveal that the investigated plants do not need to take up water against a low soil water potential. The osmotic potential at incipient plasmolysis is moderately decreasing during the growing season in three of the species, but this seems to be an endogenous process that is not caused by drought stress. Small differences between osmotic potentials at incipient plasmolysis and the minimum plant water potentials that are reached during daily courses point to a transpiration control that accepts very low turgor potentials. A plasmolysis risk is possibly diminished by an increase of cell wall elasticity during the growing season. The results support the conclusion that all investigated species have permanent access to groundwater and live as phreatophytes in the foreland of Qira oasis.
Starting Page	2816
Ending Page	2819
File Size	224972
Page Count	4
File Format	PDF
ISBN	9781424494361
e-ISBN	9781424494392
DOI	10.1109/MACE.2011.5987572
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-07-15
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Irrigation Vegetation Soil Elasticity Environmental factors Physiology Floods Water potential Hyperarid environment PV-curves Taklimakan desert
Content Type	Text
Resource Type	Article

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