干旱区生态环境知识资源中心(Arid): Populus euphratica counteracts drought stress through the dew coupling and root hydraulic redistribution processes

Arid

DOI	10.1093/aob/mcac159
	Populus euphratica counteracts drought stress through the dew coupling and root hydraulic redistribution processes
	Fan, Xue; Hao, Xingming; Zhang, Sen; Zhao, Zhuoyi; Zhang, Jingjing; Li, Yuanhang
通讯作者	Hao, XM
来源期刊	ANNALS OF BOTANY
ISSN	0305-7364
EISSN	1095-8290
出版年	2023
卷号	131 期号:3 页码:451-461
英文摘要	Background In arid and semi-arid areas, plants can directly absorb and use dew through their leaves, and some plants have the ability for hydraulic redistribution of their roots. Therefore, in arid areas, plants may redistribute dew to the soil, using the soil as a reservoir for short-term dry seasons, i.e. dew may participate in the hydraulic redistribution process of plants. This process plays an important role in plant survival and community stability. Methods To verify this hypothesis, we investigated the water use mechanism of Populus euphratica through a comprehensive observation of sap flow, water potential and soil water content using a heavy water tracer experiment under in situ field conditions. Results and Discussion Dewdrops contributed 28.3 % of soil moisture near the roots, and applying dew on leaves for several days significantly improved soil moisture status. Hydraulic redistribution in the roots mainly occurred from 2200 h at night to 800 h the following day and mainly occurred in the 20- to 80-cm soil layer. Water storage in the trunk is the intermediate link in the coupling process of foliar water uptake and hydraulic redistribution; water storage in the trunk is mainly replenished from May to July and consumed throughout the rest of the year. In conclusion, dew redistributes water into soil through the coupling process of foliar water uptake and hydraulic redistribution. Populus euphratica uses the trunk and soil for water storage to cope with water stress during short-term drought periods. Our findings provide a scientific basis for the restoration of different species in water-deficient areas, which is conducive to maintaining vegetation ecosystem stability in areas of desertification and improving the soil water balance.
英文关键词	Populus euphratica foliar water uptake hydraulic redistribution dew
类型	Article
语种	英语
开放获取类型	Green Published, Bronze
收录类别	SCI-E
WOS记录号	WOS:000939412600001
WOS关键词	FOLIAR WATER-UPTAKE ; SOIL-WATER ; STORAGE ; TRANSPORT ; FOREST ; ACQUISITION ; DYNAMICS ; TREES ; FLOW ; FOG
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395317
推荐引用方式 GB/T 7714	Fan, Xue,Hao, Xingming,Zhang, Sen,et al. Populus euphratica counteracts drought stress through the dew coupling and root hydraulic redistribution processes[J],2023,131(3):451-461.
APA	Fan, Xue,Hao, Xingming,Zhang, Sen,Zhao, Zhuoyi,Zhang, Jingjing,&Li, Yuanhang.(2023).Populus euphratica counteracts drought stress through the dew coupling and root hydraulic redistribution processes.ANNALS OF BOTANY,131(3),451-461.
MLA	Fan, Xue,et al."Populus euphratica counteracts drought stress through the dew coupling and root hydraulic redistribution processes".ANNALS OF BOTANY 131.3(2023):451-461.