气候变化领域集成服务门户(CCPortal): High water use in desert plants exposed to extreme heat

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DOI	10.1111/ele.13516
	High water use in desert plants exposed to extreme heat
	Aparecido L.M.T.; Woo S.; Suazo C.; Hultine K.R.; Blonder B.
发表日期	2020
ISSN	1461023X
起始页码	1189
结束页码	1200
卷号	23 期号:8
英文摘要	Many plant water use models predict leaves maximize carbon assimilation while minimizing water loss via transpiration. Alternate scenarios may occur at high temperature, including heat avoidance, where leaves increase water loss to evaporatively cool regardless of carbon uptake; or heat failure, where leaves non-adaptively lose water also regardless of carbon uptake. We hypothesized that these alternative scenarios are common in species exposed to hot environments, with heat avoidance more common in species with high construction cost leaves. Diurnal measurements of leaf temperature and gas exchange for 11 Sonoran Desert species revealed that 37% of these species increased transpiration in the absence of increased carbon uptake. High leaf mass per area partially predicted this behaviour (r2 = 0.39). These data are consistent with heat avoidance and heat failure, but failure is less likely given the ecological dominance of the focal species. These behaviours are not yet captured in any extant plant water use model. © 2020 John Wiley & Sons Ltd/CNRS
关键词	Cowan–Farquhar functional trait heat waves Sonoran desert stomatal regulation thermal stress transpiration water use efficiency
英文关键词	water; evapotranspiration; heat; photosynthesis; plant; plant leaf; Extreme Heat; Photosynthesis; Plant Leaves; Plant Transpiration; Plants; Water
语种	英语
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/204207
作者单位	School of Life Sciences, Arizona State University, 427 E Tyler Mall, Tempe, AZ 85821, United States; Department of Research, Conservation and Collections, Desert Botanical Garden, 1201 N. Galvin Parkway, Phoenix, AZ 85008, United States; Environmental Change Institute, School of Geography and the Environment, University of Oxford, South Parks Road, Oxford, OX1 3QY, United Kingdom; Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA 94720, United States
推荐引用方式 GB/T 7714	Aparecido L.M.T.,Woo S.,Suazo C.,et al. High water use in desert plants exposed to extreme heat[J],2020,23(8).
APA	Aparecido L.M.T.,Woo S.,Suazo C.,Hultine K.R.,&Blonder B..(2020).High water use in desert plants exposed to extreme heat.Ecology Letters,23(8).
MLA	Aparecido L.M.T.,et al."High water use in desert plants exposed to extreme heat".Ecology Letters 23.8(2020).