Seed dormancy in space and time: global distribution, paleo-and present climatic drivers and evolutionary adaptations
| 论文编号: | |||||||||
| 作者: | Zhang YZ; Liu Y;Sun L | ||||||||
| 刊物名称: | New Phytologist | ||||||||
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| 论文题目英文: | Seed dormancy in space and time: global distribution, paleo-and present climatic drivers and evolutionary adaptations | ||||||||
| 年: | Mar 2022 | ||||||||
| 卷: | online | ||||||||
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| 联系作者: | Yang J | ||||||||
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| 影响因子: | 10.152 | ||||||||
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| 摘要: |
Seed dormancy is an important life history state that increases survival and fitness of seed plants, and thus it has attracted much attention. However, global biogeography, effects of paleo-environment, evolutionary roles of dormancy transitions, and differences in adaptations of seed dormancy between lifeforms are poorly understood.
We compiled global distribution records for seed dormancy of 12,743 species and their phylogeny to explore the biogeographic patterns, environmental drivers and evolutionary transitions between seed dormancy and non-dormancy. Biogeographic patterns reveal that a low proportion of dormancy in tropical rainforest regions and arctic regions and a high proportion of dormancy in remaining tropical, subtropical and temperate regions for all species and woody species. Herbaceous plants show a greater proportion of dormancy in most global regions except arctic regions. Seasonal environments have a consistent positive influence on the dormancy pattern for both lifeforms, but precipitation and temperature were important driving factors for woody and herbaceous plants, respectively. Seed dormancy was the dominating state during the evolutionary history of seed plants, and dormancy transitions had a significant relationship with paleo-temperatures. Dormancy and non-dormancy transitions in response to fluctuating environments during long-term evolutionary history may have played important roles in the diversification of seed plants. Our results add to the current knowledge about seed dormancy from macro-adaptive perspectives and the potential adaptive mechanisms of seed plants. | ||||||||
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