Plant responses to rising vapor pressure deficit

Grossiord, Charlotte, Buckley, Thomas N., Cernusak, Lucas A., Novick, Kimberly A., Poulter, Benjamin, Siegwolf, Rolf T.W., Sperry, John S., and McDowell, Nate G. (2020) Plant responses to rising vapor pressure deficit. New Phytologist, 226 (6). pp. 1550-1566.

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Recent decades have been characterized by increasing temperatures worldwide, resulting in an exponential climb in vapor pressure deficit (VPD). VPD has been identified as an increasingly important driver of plant functioning in terrestrial biomes and has been established as a major contributor in recent drought-induced plant mortality independent of other drivers associated with climate change. Despite this, few studies have isolated the physiological response of plant functioning to high VPD, thus limiting our understanding and ability to predict future impacts on terrestrial ecosystems. An abundance of evidence suggests that stomatal conductance declines under high VPD and transpiration increases in most species up until a given VPD threshold, leading to a cascade of subsequent impacts including reduced photosynthesis and growth, and higher risks of carbon starvation and hydraulic failure. Incorporation of photosynthetic and hydraulic traits in 'next-generation' land-surface models has the greatest potential for improved prediction of VPD responses at the plant- and global-scale, and will yield more mechanistic simulations of plant responses to a changing climate. By providing a fully integrated framework and evaluation of the impacts of high VPD on plant function, improvements in forecasting and long-term projections of climate impacts can be made.

Item ID: 65827
Item Type: Article (Research - C1)
ISSN: 1469-8137
Copyright Information: © 2020 The Authors. New Phytologist. (C) 2020 New Phytologist Trust.
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Funders: Swiss National Science Foundation (SNF), National Science Foundation (NSF), USDA National Institute of Food and Agriculture (NIFA), NASA Terrestrial Ecology Program, USDA NIFA Agriculture and Food Research Initiative, NSF
Projects and Grants: SNF 5231.00639.001.01, NSF Award 1557906, NIFA 1016439, NIFA 2017-67013-26191, NSF Award 1552747
Date Deposited: 02 Feb 2021 02:39
FoR Codes: 31 BIOLOGICAL SCIENCES > 3108 Plant biology > 310806 Plant physiology @ 100%
SEO Codes: 96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960806 Forest and Woodlands Flora, Fauna and Biodiversity @ 100%
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