文献类型：期刊文献

英文题名：The evolutionary rate of leaf osmotic strength drives diversification of Primulina species in karst regions

作者：Wu, Gui-Lin[1] Ye, Qing[2,3,4] Liu, Hui[4] Chen, De-Xiang[1] Zhou, Zhang[1] Kang, Ming[4] Kong, Hang-Hui[4] Qiu, Zhi-Jing[5] Wang, Hui[5]

第一作者：Wu, Gui-Lin

通信作者：Ye, Q[1];Ye, Q[2];Ye, Q[3]

机构：[1]Chinese Acad Forestry, Res Inst Trop Forestry, Hainan Jianfengling Forest Ecosyst Natl Field Sci, Guangzhou 510520, Peoples R China;[2]Gannan Normal Univ, Coll Life Sci, Ganzhou 341000, Jiangxi, Peoples R China;[3]Southern Marine Sci & Engn Guangdong Lab Guangzhou, Guangzhou 511458, Peoples R China;[4]Chinese Acad Sci, Key Lab Vegetat Restorat & Management Degraded Eco, Guangdong Prov Key Lab Appl Bot, South China Bot Garden, Guangzhou 510650, Peoples R China;[5]Shenzhen & Chinese Acad Sci, Key Lab Southern Subtrop Plant Divers, Fairy Lake Bot Garden, Shenzhen 518004, Peoples R China

年份：0

外文期刊名：JOURNAL OF SYSTEMATICS AND EVOLUTION

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000888461100001)】；

基金：We are grateful to the editor and reviewers for their constructive suggestions and comments on an earlier version of this manuscript. We thank Lihua Yang provided field pictures of Primulina. This work was supported by the National Natural Science Foundation of China (31825005), Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou; GML2019ZD0408), the Institution of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences (ISEE2020YB01).

语种：英文

外文关键词：diversification rate; karst; leaf drought tolerance; osmotic strength; phylogenetic analysis; water storage capacity

摘要：Leaf water storage capacity and osmotic strength are important traits enabling species to adapt to environments that are often moisture limited. However, whether these drought tolerance traits are correlated with the species diversification rate (DR) of plant lineages is yet to be determined. In this study, we selected a species-rich genus (Primulina) of plants widely distributed in karst regions in which species frequently experience variable periods of drought. We measured water storage capacity-related traits (including leaf thickness and water content per mass) and saturated osmotic strength in the leaves of 58 Primulina species growing in a common garden. Subsequently, using phylogenetic methods, we examined the relationships between the rate of species diversification and the drought tolerance traits and between the species DR and evolutionary rates of these traits. We found that neither water storage capacity nor saturated osmotic strength showed significant relationships with the rate of species diversification. However, the evolutionary rate of saturated osmotic strength showed a significant correlation with the species DR, although no comparable significant relationship was detected regarding the evolutionary rate of water storage capacity. Our study indicates that the diversification among Primulina species has typically been accompanied by an extensive divergence of leaf osmotic strength but not a divergence in leaf water storage capacity. These findings will enhance our current understanding of how drought tolerance influences the diversification of plant species in karst regions.