DOI: 10.1073/pnas.1918162117
论文题名: Global variation in the thermal tolerances of plants
作者: Lancaster L.T. ; Humphreys A.M.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期: 24 起始页码: 13580
结束页码: 13587
语种: 英语
英文关键词: Cold and heat
; Hardening
; Latitude
; Macrophysiology
; Temperature
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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164160
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
Lancaster L.T.,Humphreys A.M.. Global variation in the thermal tolerances of plants[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(24)