Metrics and proxies for stringency of regulation of plant water status (iso/anisohydry): a global data set reveals coordination and trade-offs among water transport traits

doi:10.1093/treephys/tpy087

	Metrics and proxies for stringency of regulation of plant water status (iso/anisohydry): a global data set reveals coordination and trade-offs among water transport traits
	Fu, Xiaoli 1,2; Meinzer, Frederick C.3
刊名	TREE PHYSIOLOGY
	2019
卷号	39 期号:1 页码:122-134
关键词	anisohydry drought tolerance hydraulic architecture hydraulic safety margin isohydry leaf osmotic potential plant functional traits stomata wood density xylem embolism resistance.
ISSN号	0829-318X
DOI	10.1093/treephys/tpy087
通讯作者	Meinzer, Frederick C.(Rick.Meinzer@oregonstate.edu)
英文摘要	Plants operate along a continuum of stringency of regulation of plant water potential from isohydry to anisohydry. However, most metrics and proxies of plant iso/anisohydric behavior have been developed from limited sets of site-specific experiments. Understanding the underlying mechanisms that determine species' operating ranges along this continuum, independent of site and growing conditions, remains challenging. We compiled a global database to assess the global patterns of metrics and proxies of plant iso/anisohydry and then explored some of the underlying functional traits and trade-offs associated with stringency of regulation that determines where species operate along the continuum. Our results showed that arid and semi-arid biomes were associated with greater anisohydry than more mesic biomes, and angiosperms showed marginally greater anisohydry than gymnosperms. Leaf water potential at the turgor loss point (psi(tlp)) and wood density were the two most powerful proxies for ranking the degree of plant iso/anisohydry for a wide range of species and biomes. Both of these simple traits can be easily and rapidly determined, and therefore show promise for a priori mapping and understanding of the global distribution pattern of the degree of plant iso/anisohydry. Generally, the most anisohydric species had the most negative values of psi(tlp) and highest wood density, greatest resistance to embolism, lowest hydraulic capacitance and lowest leaf-specific hydraulic conductivity of their branches. Wood density in particular appeared to be central to a coordinated series of traits, trade-offs and behaviors along a continuum of iso/anisohydry. Quantification of species' operating ranges along a continuum of iso/anisohydry and identification of associated trade-offs among functional traits may hold promise for mechanistic modeling of species-specific responses to the anticipated more frequent and severe droughts under global climate change scenarios.
资助项目	National Natural Science Foundation of China[31730014] ; National Natural Science Foundation of China[41671224] ; National Key Research and Development Program of China[2016YFD0600202] ; China Scholarship Council (CSC)
WOS关键词	HYDRAULIC SAFETY MARGINS ; TURGOR LOSS POINT ; DROUGHT TOLERANCE ; WOOD DENSITY ; CAVITATION RESISTANCE ; EVAPORATIVE DEMAND ; STOMATAL CONTROL ; ROOT PRODUCTION ; TREE MORTALITY ; SOIL-MOISTURE
WOS研究方向	Forestry
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000461507600012
资助机构	National Natural Science Foundation of China ; National Key Research and Development Program of China ; China Scholarship Council (CSC)
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/49189]
专题	中国科学院地理科学与资源研究所
通讯作者	Meinzer, Frederick C.
作者单位	1.Chinese Acad Sci, Qianyanzhou Ecol Res Stn, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 2.Jiangxi Key Lab Ecosyst Proc & Informat, Jian 343725, Jiangxi, Peoples R China 3.USDA Forest Serv, Pacific Northwest Res Stn, 3200 SW Jefferson Way, Corvallis, OR 97331 USA
推荐引用方式 GB/T 7714	Fu, Xiaoli,Meinzer, Frederick C.. Metrics and proxies for stringency of regulation of plant water status (iso/anisohydry): a global data set reveals coordination and trade-offs among water transport traits[J]. TREE PHYSIOLOGY,2019,39(1):122-134.
APA	Fu, Xiaoli,&Meinzer, Frederick C..(2019).Metrics and proxies for stringency of regulation of plant water status (iso/anisohydry): a global data set reveals coordination and trade-offs among water transport traits.TREE PHYSIOLOGY,39(1),122-134.
MLA	Fu, Xiaoli,et al."Metrics and proxies for stringency of regulation of plant water status (iso/anisohydry): a global data set reveals coordination and trade-offs among water transport traits".TREE PHYSIOLOGY 39.1(2019):122-134.