globalchange  > 气候变化与战略
DOI: 10.1073/pnas.1912451117
论文题名:
Functional variants of DOG1 control seed chilling responses and variation in seasonal life-history strategies in Arabidopsis thaliana
作者: Martínez-Berdeja A.; Stitzer M.C.; Taylor M.A.; Okada M.; Ezcurra E.; Runcie D.E.; Schmitt J.
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:5
起始页码: 2526
结束页码: 2534
语种: 英语
英文关键词: Delay of germination ; Genome-wide association ; Germination niche ; Seed dormancy ; Stratification
Scopus关键词: Arabidopsis thaliana ; article ; climate change ; cold acclimatization ; cold stress ; flower development ; forest ; gene frequency ; genome-wide association study ; germination ; haplotype ; life history ; local adaptation ; nonhuman ; phylogeny ; Pleistocene ; seed dormancy ; senescence ; single nucleotide polymorphism ; turnover rate ; allele ; Arabidopsis ; chemistry ; cold ; gene expression regulation ; genetic polymorphism ; genetics ; germination ; growth, development and aging ; life history trait ; metabolism ; plant seed ; season ; Arabidopsis protein ; DOG1 protein, Arabidopsis ; Alleles ; Arabidopsis ; Arabidopsis Proteins ; Cold Temperature ; Gene Expression Regulation, Plant ; Germination ; Life History Traits ; Polymorphism, Genetic ; Seasons ; Seeds
英文摘要: The seasonal timing of seed germination determines a plant’s realized environmental niche, and is important for adaptation to climate. The timing of seasonal germination depends on patterns of seed dormancy release or induction by cold and interacts with flowering-time variation to construct different seasonal life histories. To characterize the genetic basis and climatic associations of natural variation in seed chilling responses and associated life-history syndromes, we selected 559 fully sequenced accessions of the model annual species Arabidopsis thaliana from across a wide climate range and scored each for seed germination across a range of 13 cold stratification treatments, as well as the timing of flowering and senescence. Germination strategies varied continuously along 2 major axes: 1) Overall germination fraction and 2) induction vs. release of dormancy by cold. Natural variation in seed responses to chilling was correlated with flowering time and senescence to create a range of seasonal life-history syndromes. Genome-wide association identified several loci associated with natural variation in seed chilling responses, including a known functional polymorphism in the self-binding domain of the candidate gene DOG1. A phylogeny of DOG1 haplotypes revealed ancient divergence of these functional variants associated with periods of Pleistocene climate change, and Gradient Forest analysis showed that allele turnover of candidate SNPs was significantly associated with climate gradients. These results provide evidence that A. thaliana’s germination niche and correlated life-history syndromes are shaped by past climate cycles, as well as local adaptation to contemporary climate. © 2020 National Academy of Sciences. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164338
Appears in Collections:气候变化与战略

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作者单位: Martínez-Berdeja, A., Department of Evolution and Ecology, University of California, Davis, CA 95616, United States; Stitzer, M.C., Department of Evolution and Ecology, University of California, Davis, CA 95616, United States, Center for Population Biology, University of California, Davis, CA 95616, United States; Taylor, M.A., Department of Evolution and Ecology, University of California, Davis, CA 95616, United States; Okada, M., Department of Evolution and Ecology, University of California, Davis, CA 95616, United States; Ezcurra, E., Department of Botany and Plant Sciences, University of California, Riverside, CA 92521, United States; Runcie, D.E., Department of Plant Sciences, University of California, Davis, CA 95616, United States; Schmitt, J., Department of Evolution and Ecology, University of California, Davis, CA 95616, United States, Center for Population Biology, University of California, Davis, CA 95616, United States

Recommended Citation:
Martínez-Berdeja A.,Stitzer M.C.,Taylor M.A.,et al. Functional variants of DOG1 control seed chilling responses and variation in seasonal life-history strategies in Arabidopsis thaliana[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(5)
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