Phenotypic plasticity in response to temperature fluctuations is genetically variable, and relates to climatic variability of origin, in Arabidopsis thaliana

被引:43
作者
Scheepens, J. F. [1 ]
Deng, Ying [1 ]
Bossdorf, Oliver [1 ]
机构
[1] Univ Tubingen, Inst Evolut & Ecol, Plant Evolutionary Ecol, Morgenstelle 5, D-72076 Tubingen, Germany
关键词
Adaptation; climatic variability; genotype; heat stress; intraspecific variation; phenotypic plasticity; ENVIRONMENTAL HETEROGENEITY; STRESS-RESPONSE; ADAPTATION; PLANT; EVOLUTIONARY; DROUGHT; DIVERSITY; DIFFERENTIATION; SURVIVAL; PATTERN;
D O I
10.1093/aobpla/ply043
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Under current climate change, increasing mean temperatures are not only causing hotter summers, but temperature variability is increasing as well. Phenotypic plasticity can help plants to overcome negative effects of temperature variability and allow them to rapidly adjust traits to adverse conditions. Moreover, genetic variation in such plasticity could provide potential for adaptive evolution in response to changing climate variability. Here, we conducted an experiment with 11 Arabidopsis thaliana genotypes to investigate intraspecific variation in plant responses to two aspects of variable temperature stress: timing and frequency. We found that the timing but not frequency of temperature stress affected the phenology, growth, reproduction and allocation strategy of plants, and that genotypes differed substantially in their responses. Moreover, trait plasticity was positively related to precipitation variability of origin, suggesting an adaptive role of plasticity. Our results indicate that the developmental stage of a plant during heat stress is a key determinant of its response, and that plasticity to temperature variability is an evolving and possibly adaptive trait in natural populations of A. thaliana. More generally, our study demonstrates the usefulness of studying plant responses to climatic variability per se, given that climatic variability is predicted to increase in the future.
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页数:12
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