Contrasting patterns of leaf solute accumulation and salt adaptation in four phreatophytic desert plants in a hyperarid desert with saline groundwater

CORC > 新疆生态与地理研究所 > 中国科学院新疆生态与地理研究所 > 中国科学院新疆生态与地理研究所(2010年以前数据)

	Contrasting patterns of leaf solute accumulation and salt adaptation in four phreatophytic desert plants in a hyperarid desert with saline groundwater
	Arndt ; SK ; Arampatsis ; C ; Foetzki ; A ; Li ; XY ; Zeng ; FJ ; Zhang ; XM
刊名	JOURNAL OF ARID ENVIRONMENTS
	2004
卷号	59 期号:2 页码:259-270
关键词	TOLERANCE MECHANISMS TRANSPORT RESPONSES DROUGHT STRESS GROWTH SAP
ISSN号	0140-1963
通讯作者	Arndt, SK, Univ Melbourne, Forest Sci Ctr, Water St, Creswick, Vic 3363, Australia
中文摘要	The seasonal variation of leaf solutes was investigated in four perennial phreatophytes in the natural vegetation surrounding a river oasis in the Chinese Taklamakan desert in order to elucidate their adaptation to saline groundwater. Leaves of the herbaceous perennial legume Alhagi sparsifolia, the poplar tree Populus euphratica, the salt cedar Tamarix ramosissima, and the C-4 shrub Calligonum caput-medusae were collected at the end of each month during the growing season 1999 and analysed for cation, anion, organic acid, carbohydrate, glycinebetaine, and proline concentrations. The species revealed considerable differences in the foliar solute composition and their seasonal variation. Tamarix had high foliar mineral salt concentrations throughout the season but excreted the accumulated salts via salt glands. The three other species showed different degrees of ion regulation and ion selectivity. Calligonum had generally very low mineral ion concentrations, tolerated moderate Cl- concentrations and excluded Na+. Populus effectively excluded Cl- from its leaves but Na+ and total solute concentrations increased towards the end of the season which lead to K:Na ratio smaller than one in October. Alhagi showed the highest degree of ion selectivity by excluding Na+ but accumulating Ca2+ in its leaves. Mineral salt composition of xylemsap in Alhagi and Calligonian indicated that both species showed a similar degree of ion selectivity in the roots and that ion retransloction is probably another important mechanism to maintain low salt concentrations in the leaf. The cyclitols chiro-inositol and pinitol were the major compatible solutes in the plants and N-containing solutes like proline or glycinebetaine occurred only in minor concentrations or were absent, respectively. All plant species were well adapted to the moderate salinity of the NaCl dominated groundwater and no signs of salt related drought stress, ion toxicity or nutrient imbalance were observed. (C) 2003 Elsevier Ltd. All rights reserved.
学科主题	植物生理学
收录类别	SCI
公开日期	2011-08-19
内容类型	期刊论文
源URL	[http://ir.xjlas.org/handle/365004/10556]
专题	新疆生态与地理研究所_中国科学院新疆生态与地理研究所(2010年以前数据)
推荐引用方式 GB/T 7714	Arndt,SK,Arampatsis,et al. Contrasting patterns of leaf solute accumulation and salt adaptation in four phreatophytic desert plants in a hyperarid desert with saline groundwater[J]. JOURNAL OF ARID ENVIRONMENTS,2004,59(2):259-270.
APA	Arndt.,SK.,Arampatsis.,C.,Foetzki.,...&XM.(2004).Contrasting patterns of leaf solute accumulation and salt adaptation in four phreatophytic desert plants in a hyperarid desert with saline groundwater.JOURNAL OF ARID ENVIRONMENTS,59(2),259-270.
MLA	Arndt,et al."Contrasting patterns of leaf solute accumulation and salt adaptation in four phreatophytic desert plants in a hyperarid desert with saline groundwater".JOURNAL OF ARID ENVIRONMENTS 59.2(2004):259-270.