气候变化领域集成服务门户(CCPortal): Global variation in the thermal tolerances of plants

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DOI	10.1073/pnas.1918162117
	Global variation in the thermal tolerances of plants
	Lancaster L.T.; Humphreys A.M.
发表日期	2020
ISSN	0027-8424
起始页码	13580
结束页码	13587
卷号	117 期号:24
英文摘要	Thermal macrophysiology is an established research field that has led to well-described patterns in the global structuring of climate adaptation and risk. However, since it was developed primarily in animals, we lack information on how general these patterns are across organisms. This is alarming if we are to understand how thermal tolerances are distributed globally, improve predictions of climate change, and mitigate effects. We approached this knowledge gap by compiling a geographically and taxonomically extensive database on plant heat and cold tolerances and used this dataset to test for thermal macrophysiological patterns and processes in plants. We found support for several expected patterns: Cold tolerances are more variable and exhibit steeper latitudinal clines and stronger relationships with local environmental temperatures than heat tolerances overall. Next, we disentangled the importance of local environments and evolutionary and biogeographic histories in generating these patterns. We found that all three processes have significantly contributed to variation in both heat and cold tolerances but that their relative importance differs. We also show that failure to simultaneously account for all three effects overestimates the importance of the included variable, challenging previous conclusions drawn from less comprehensive models. Our results are consistent with rare evolutionary innovations in cold acclimation ability structuring plant distributions across biomes. In contrast, plant heat tolerances vary mainly as a result of biogeographical processes and drift. Our results further highlight that all plants, particularly at mid-to-high latitudes and in their nonhardened state, will become increasingly vulnerable to ongoing climate change. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Cold and heat; Hardening; Latitude; Macrophysiology; Temperature
语种	英语
scopus关键词	article; biome; climate change; cold stress; cold tolerance; environmental temperature; heat tolerance; latitude; acclimatization; adaptation; altitude; classification; cold; ecosystem; evolution; genetics; plant; plant development; plant physiology; Acclimatization; Adaptation, Physiological; Altitude; Biological Evolution; Climate Change; Cold Temperature; Ecosystem; Plant Development; Plant Physiological Phenomena; Plants; Thermotolerance
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160910
作者单位	Lancaster, L.T., School of Biological Sciences, University of Aberdeen, Aberdeen, AB24 2TZ, United Kingdom; Humphreys, A.M., Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, 10691, Sweden, Bolin Centre for Climate Research, Stockholm University, Stockholm, 10691, Sweden
推荐引用方式 GB/T 7714	Lancaster L.T.,Humphreys A.M.. Global variation in the thermal tolerances of plants[J],2020,117(24).
APA	Lancaster L.T.,&Humphreys A.M..(2020).Global variation in the thermal tolerances of plants.Proceedings of the National Academy of Sciences of the United States of America,117(24).
MLA	Lancaster L.T.,et al."Global variation in the thermal tolerances of plants".Proceedings of the National Academy of Sciences of the United States of America 117.24(2020).