Strong phylogenetic signals and phylogenetic niche conservatism in ecophysiological traits across divergent lineages of Magnoliaceae.
Strong phylogenetic signals and phylogenetic niche conservatism in ecophysiological traits across divergent lineages of Magnoliaceae.
复制标题
木兰科不同谱系生态生理特征中的强系统发育信号和系统发育生态位保守性
DOI：
10.1038/srep12246
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发表时间：
2015-07-16
影响因子：
4.6
通讯作者：
Ye Q
中科院分区：
文献类型：
--
作者：
Liu H;Xu Q;He P;Santiago LS;Yang K;Ye Q
早期分化的木兰科植物在谱系中表现出历史上的温带-热带分布，表明分化进化，但哪些生理生态性状在遗传学上是保守的，这些性状是否参与相关进化仍不清楚。综合木兰科4个大组27个种的亲缘关系和20个生理生态性状，对这些性状的系统发育信号和性状对之间的相关进化进行了分析。系统发育生态位保守性（PNC）在水分传导和养分利用相关性状的鉴定和相关的几个关键功能性状的进化证明。在3种热带常绿植物中，桂竹香的水力光合能力最低，耐旱性最强，木莲和含笑次之。与此相反，温带中心落叶节，玉兰，表现出较高的水分传导率和光合作用的耐旱性的代价。本研究阐明了木兰科植物在温带-热带适应过程中的水力和光合作用过程的调节，从而导致木兰科不同谱系的生理生态性状具有较强的系统发育信号和PNC。
The early diverged Magnoliaceae shows a historical temperate-tropical distribution among lineages indicating divergent evolution, yet which ecophysiological traits are phylogenetically conserved and whether these traits are involved in correlated evolution remain unclear. Integrating phylogeny and 20 ecophysiological traits of 27 species, from the four largest sections of Magnoliaceae, we tested the phylogenetic signals of these traits and the correlated evolution between trait pairs. Phylogenetic niche conservatism (PNC) in water-conducting and nutrient-use related traits was identified and correlated evolution of several key functional traits was demonstrated. Among the three evergreen sections of tropical origin,Gwillimiahad the lowest hydraulic-photosynthetic capacity and the highest drought tolerance compared withManglietiaandMichelia. Contrastingly, the temperate centred deciduous section,Yulania, showed high rates of hydraulic conductivity and photosynthesis at the cost of drought tolerance. This study elucidated the regulation of hydraulic and photosynthetic processes in the temperate-tropical adaptations for Magnoliaceae species, which led to strong phylogenetic signals and PNC in ecophysiological traits across divergent lineages of Magnoliaceae.