气候变化领域集成服务门户(CCPortal): Evolution and seed dormancy shape plant genotypic structure through a successional cycle

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DOI	10.1073/pnas.2026212118
	Evolution and seed dormancy shape plant genotypic structure through a successional cycle
	Agrawal A.A.; Hastings A.P.; Maron J.L.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:34
英文摘要	Dormancy has repeatedly evolved in plants, animals, and microbes and is hypothesized to facilitate persistence in the face of environmental change. Yet previous experiments have not tracked demography and trait evolution spanning a full successional cycle to ask whether early bouts of natural selection are later reinforced or erased during periods of population dormancy. In addition, it is unclear how well short-term measures of fitness predict long-term genotypic success for species with dormancy. Here, we address these issues using experimental field populations of the plant Oenothera biennis, which evolved over five generations in plots exposed to or protected from insect herbivory. While populations existed above ground, there was rapid evolution of defensive and life-history traits, but populations lost genetic diversity and crashed as succession proceeded. After >5 y of seed dormancy, we triggered germination from the seedbank and genotyped >3,000 colonizers. Resurrected populations showed restored genetic diversity that reduced earlier responses to selection and pushed population phenotypes toward the starting conditions of a decade earlier. Nonetheless, four defense and life-history traits remained differentiated in populations with insect suppression compared with controls. These findings capture key missing elements of evolution during ecological cycles and demonstrate the impact of dormancy on future evolutionary responses to environmental change. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Chemical ecology; Common evening primrose Oenothera biennis; Defense theory; Experimental evolution; Multigenerational experiment
语种	英语
scopus关键词	article; conservational seed bank; controlled study; ecology; environmental change; genetic variability; germination; herbivory; insect; life history trait; nonhuman; Oenothera biennis; phenotype; seed dormancy
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/238661
作者单位	Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY 14853, United States; Division of Biological Sciences, University of Montana, Missoula, MT 59803, United States
推荐引用方式 GB/T 7714	Agrawal A.A.,Hastings A.P.,Maron J.L.. Evolution and seed dormancy shape plant genotypic structure through a successional cycle[J],2021,118(34).
APA	Agrawal A.A.,Hastings A.P.,&Maron J.L..(2021).Evolution and seed dormancy shape plant genotypic structure through a successional cycle.Proceedings of the National Academy of Sciences of the United States of America,118(34).
MLA	Agrawal A.A.,et al."Evolution and seed dormancy shape plant genotypic structure through a successional cycle".Proceedings of the National Academy of Sciences of the United States of America 118.34(2021).