期刊
SEED SCIENCE RESEARCH
卷 27, 期 2, 页码 110-120出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0960258517000083
关键词
base temperature; base water potential; germination traits; hydrotime; lifespan; phylogenetic signal; seed size; seed-plant; thermal time
资金
- Region Provence-Alpes Cotes d'Azur
- Gevocle program
- Aix Marseille Universite
- European Union ENPI CBC-MED GREAT-MED program
Understanding how plant traits interact with climate to determine plant niches is decisive for predicting climate change impacts. While lifespan and seed size modify the importance of germination timing, germination traits such as base temperature and base water potential directly translate climatic conditions into germination timing, impacting performance in later life stages. Yet we do not know how base temperature, base water potential, seed mass, lifespan and climate are related. We tested the relationships between base temperature and base water potential for germination, seed size and lifespan while controlling for bioclimatic regions. We also quantified the phylogenetic signal in germination traits and seed size using Pagel's lambda. We used a worldwide data set of germination responses to temperature and moisture, seed size and lifespan of 240 seed plants from 49 families. Both germination temperature and moisture are negatively related to seed size. Annual plants show a negative relation between seed size and base water potential, whereas perennials display a negative relation between base temperature and seed mass. Pagel's lambda highlighted the slow evolution of base temperature for germination, comparable to seed mass while base water potential was revealed to be labile. In the future, base water potential and seed mass can be used when moisture niches of plants are to be predicted. Lifespan, seed size and base temperature should be taken into account when analysing thermal limits of species distributions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据