气候变化领域集成服务门户(CCPortal): Plant resistance to drought depends on timely stomatal closure

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DOI	10.1111/ele.12851
	Plant resistance to drought depends on timely stomatal closure
	Martin-StPaul N.; Delzon S.; Cochard H.
发表日期	2017
ISSN	1461-023X
EISSN	1461-0248
卷号	20 期号:11
英文摘要	Stomata play a significant role in the Earth's water and carbon cycles, by regulating gaseous exchanges between the plant and the atmosphere. Under drought conditions, stomatal control of transpiration has long been thought to be closely coordinated with the decrease in hydraulic capacity (hydraulic failure due to xylem embolism). We tested this hypothesis by coupling a meta-analysis of functional traits related to the stomatal response to drought and embolism resistance with simulations from a soil–plant hydraulic model. We report here a previously unreported phenomenon: the existence of an absolute limit by which stomata closure must occur to avoid rapid death in drought conditions. The water potential causing stomatal closure and the xylem pressure at the onset of embolism formation were equal for only a small number of species, and the difference between these two traits (i.e. safety margins) increased continuously with increasing embolism resistance. Our findings demonstrate the need to revise current views about the functional coordination between stomata and hydraulic traits and provide a mechanistic framework for modeling plant mortality under drought conditions. © 2017 John Wiley & Sons Ltd/CNRS
英文关键词	Dieback; drought; stomata; tree mortality; xylem embolism
学科领域	water; drought; evapotranspiration; physiological stress; physiology; plant leaf; plant physiology; plant stoma; xylem; Droughts; Plant Leaves; Plant Physiological Phenomena; Plant Stomata; Plant Transpiration; Stress, Physiological; Water; Xylem
语种	英语
scopus关键词	water; drought; evapotranspiration; physiological stress; physiology; plant leaf; plant physiology; plant stoma; xylem; Droughts; Plant Leaves; Plant Physiological Phenomena; Plant Stomata; Plant Transpiration; Stress, Physiological; Water; Xylem
来源期刊	Ecology Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/118306
作者单位	URFM, INRA, Avignon, 84000, France; BIOGECO, INRA, Univ. Bordeaux, Pessac, 33615, France; Université Clermont-Auvergne, INRA, PIAF, Clermont-Ferrand, 63000, France
推荐引用方式 GB/T 7714	Martin-StPaul N.,Delzon S.,Cochard H.. Plant resistance to drought depends on timely stomatal closure[J],2017,20(11).
APA	Martin-StPaul N.,Delzon S.,&Cochard H..(2017).Plant resistance to drought depends on timely stomatal closure.Ecology Letters,20(11).
MLA	Martin-StPaul N.,et al."Plant resistance to drought depends on timely stomatal closure".Ecology Letters 20.11(2017).