干旱区生态环境知识资源中心(Arid): Hydraulic Characteristics of Populus euphratica in an Arid Environment

Arid

DOI	10.3390/f10050407
	Hydraulic Characteristics of Populus euphratica in an Arid Environment
	Li, Duan 1,2; Si, Jianhua1,2 ; Zhang, Xiaoyou 1,2; Gao, Yayu 1,2; Wang, Chunlin 1,2; Luo, Huan 1,2; Qin, Jie 1,2; Gao, Guanlong 3
通讯作者	Si, Jianhua
来源期刊	FORESTS
EISSN	1999-4907
出版年	2019
卷号	10 期号:5
英文摘要	Stable hydraulic conductivity in forest trees maintains healthy tree crowns and contributes to productivity in forest ecosystems. Drought conditions break down this relationship, but the mechanisms are poorly known and may depend on drought severity. To increase the understanding of changes in hydraulic conductivity during drought, we determined hydraulic parameters in Populus euphratica Oliv. (P. euphratica) in naturally arid conditions and in a simulated severe drought using a high-pressure flow meter. The results showed that leaf-specific hydraulic conductance (LSC) of leaf blades was less variable in mild drought, and increased significantly in severe drought. Plants attempted to maintain stability in leaf blade LSC under moderate water stress. In extreme drought, LSC was enhanced by increasing hydraulic conductance in plant parts with less hydraulic limitation, decreasing it in other parts, and decreasing leaf area; this mechanism protected the integrity of water transport in portions of tree crowns, and induced scorched branches and partial mortality in other parts of crowns. We conclude that limitation in water supply and elastic regulation of hydraulic characteristics may drive the mortality of tree branches as a result of severe drought. Evaluation of adaptive water transport capacity in riparian plants in arid areas provides a scientific basis for riparian forest restoration.
英文关键词	Populus euphratica riparian tree hydraulic characteristic hydraulic segmentation survival strategy drought
类型	Article
语种	英语
国家	Peoples R China
开放获取类型	Green Submitted, gold
收录类别	SCI-E
WOS记录号	WOS:000478814700046
WOS关键词	WATER-USE ; GROUNDWATER DEPTH ; DROUGHT STRESS ; LOWER REACHES ; VULNERABILITY ; CONDUCTANCE ; ROOT ; COORDINATION ; CONDUCTIVITY ; ARCHITECTURE
WOS类目	Forestry
WOS研究方向	Forestry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215694
作者单位	1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol Inland River Basin, Lanzhou 730000, Gansu, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 3.Shanxi Univ, Dept Environm & Resources, Taiyuan 030006, Shanxi, Peoples R China
推荐引用方式 GB/T 7714	Li, Duan,Si, Jianhua,Zhang, Xiaoyou,et al. Hydraulic Characteristics of Populus euphratica in an Arid Environment[J],2019,10(5).
APA	Li, Duan.,Si, Jianhua.,Zhang, Xiaoyou.,Gao, Yayu.,Wang, Chunlin.,...&Gao, Guanlong.(2019).Hydraulic Characteristics of Populus euphratica in an Arid Environment.FORESTS,10(5).
MLA	Li, Duan,et al."Hydraulic Characteristics of Populus euphratica in an Arid Environment".FORESTS 10.5(2019).