干旱区生态环境知识资源中心(Arid): The Mechanism of Changes in Hydraulic Properties of Populus euphratica in Response to Drought Stress

Arid

DOI	10.3390/f10100904
	The Mechanism of Changes in Hydraulic Properties of Populus euphratica in Response to Drought Stress
	Li, Duan 1,2; Si, Jianhua1,2 ; Zhang, Xiaoyou 1,2; Gao, Yayu 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:10
英文摘要	Stable hydraulic conductivity in forest trees maintains the survival of trees which contribute to productivity in forest ecosystems. Drought conditions break down this relationship, but the mechanisms are poorly known. To increase the understanding of the mechanism of hydraulic characteristics during drought, we determined hydraulic parameters in Populus euphratica Oliv. (P. euphratica) in a time-series of drought using a high-pressure flow meter. We found that P. euphratica could enhance hydraulic transport in severe drought stress under a threshold of soil water content. Drought-induced loss of hydraulic conductance could seriously impair water transport capacity. The soil water content of about 4.5% in the rhizosphere could lead to canopy mortality yet maintain live roots. Hydraulic conductance could be changed under drought stress as a consequence of changes in the anatomical structure and physiology. Furthermore, there was also a trade-off between hydraulic efficiency and safety. The consideration of hydraulic efficiency was first within the range of hydraulic safety limit. Once the hydraulic safety limit was reached, safety would be taken as the first consideration and hydraulic efficiency would be reduced. Research on the mechanism of hydraulic properties 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 threshold water transport trade-off drought
类型	Article
语种	英语
国家	Peoples R China
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000498395600081
WOS关键词	GROUNDWATER DEPTH ; DESICCATION-TOLERANCE ; RIPARIAN PLANTS ; WATER RELATIONS ; XYLEM STRUCTURE ; LEAF VEIN ; VULNERABILITY ; CONDUCTANCE ; RESISTANCE ; EMBOLISM
WOS类目	Forestry
WOS研究方向	Forestry
EI主题词	2019-10-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310142
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. The Mechanism of Changes in Hydraulic Properties of Populus euphratica in Response to Drought Stress[J],2019,10(10).
APA	Li, Duan.,Si, Jianhua.,Zhang, Xiaoyou.,Gao, Yayu.,Luo, Huan.,...&Gao, Guanlong.(2019).The Mechanism of Changes in Hydraulic Properties of Populus euphratica in Response to Drought Stress.FORESTS,10(10).
MLA	Li, Duan,et al."The Mechanism of Changes in Hydraulic Properties of Populus euphratica in Response to Drought Stress".FORESTS 10.10(2019).