干旱区生态环境知识资源中心(Arid): Contrasting water sources and water-use efficiency in coexisting desert plants in two saline-sodic soils in northwest China

Arid

DOI	10.1111/plb.13028
	Contrasting water sources and water-use efficiency in coexisting desert plants in two saline-sodic soils in northwest China
	Min, X-J 1,2,3; Zang, Y-X 1,2,3; Sun, W.4; Ma, J-Y 1,2
通讯作者	Ma, J-Y
来源期刊	PLANT BIOLOGY
ISSN	1435-8603
EISSN	1438-8677
出版年	2019
卷号	21 期号:6 页码:1150-1158
英文摘要	Soil degradation resulting from various types of salinity is a major environmental problem, especially in arid and semiarid regions. Exploring the water-related physiological traits of halophytes is useful for understanding the mechanisms of salt tolerance. This knowledge could be used to rehabilitate degraded arid lands. To investigate whether different types of salinity influence the water sources and water-use efficiency of desert plants (Karelinia caspia, Tamarix hohenackeri, Nitraria sibirica, Phragmites australis, Alhagi sparsifolia, Suaeda microphylla, Kalidium foliatum) in natural environments, we measured leaf gas exchange, leaf carbon and xylem oxygen isotope composition and soil oxygen isotope composition at neutral saline-sodic site (NSS) and alkaline saline-sodic site (ASS) in northwest China. The studied plants had different xylem water oxygen isotope compositions (delta O-18) and foliar carbon isotope compositions (delta C-13), indicating that desert plants coexist through differentiation in water use patterns. Compared to that at the NSS site, the stem water in K. caspia, A. sparsifolia and S. microphylla was depleted in O-18 at the ASS site, which indicates that plants can switch to obtain water from deeper soil layers when suffering environmental stress from both salinity and alkalinisation. Alhagi sparsifolia had higher delta C-13 at the ASS site than at the NSS site, while K. caspia and S. microphylla had lower delta C-13, which may have resulted from interspecific differences in plant alkali and salt tolerance ability. Our results suggest that under severe salinity and alkalinity, plants may exploit deeper soil water to avoid ion toxicity resulting from high concentrations of soluble salts in the superficial soil layer. In managed lands, it is vital to select and cultivate different salt-tolerant or alkali-tolerant plant species in light of local conditions.
英文关键词	Photosynthesis saline-sodic stable isotopes water source water-use efficiency
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000478350700001
WOS关键词	CARBON-ISOTOPE DISCRIMINATION ; GAS-EXCHANGE ; USE PATTERNS ; SALT ; ADAPTATION ; SHRUBS ; GROWTH ; ADJUSTMENT ; TOLERANCE ; NITROGEN
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/218010
作者单位	1.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Key Lab Biogeog & Bioresource Arid Land, Urumqi, Peoples R China; 2.Chinese Acad Sci, Fukang Desert Ecol Res Stn, Fukang, Peoples R China; 3.Univ Chinese Acad Sci, Beijing, Peoples R China; 4.Northeast Normal Univ, Inst Grassland Sci, Key Lab Vegetat Ecol, Minist Educ, Changchun, Jilin, Peoples R China
推荐引用方式 GB/T 7714	Min, X-J,Zang, Y-X,Sun, W.,et al. Contrasting water sources and water-use efficiency in coexisting desert plants in two saline-sodic soils in northwest China[J]. 中国科学院新疆生态与地理研究所,2019,21(6):1150-1158.
APA	Min, X-J,Zang, Y-X,Sun, W.,&Ma, J-Y.(2019).Contrasting water sources and water-use efficiency in coexisting desert plants in two saline-sodic soils in northwest China.PLANT BIOLOGY,21(6),1150-1158.
MLA	Min, X-J,et al."Contrasting water sources and water-use efficiency in coexisting desert plants in two saline-sodic soils in northwest China".PLANT BIOLOGY 21.6(2019):1150-1158.