| Autor: |
Yang X; State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, People's Republic of China.; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China., Zhang X; CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Chinese Academy of Sciences, Wuhan Botanical Garden, Wuhan 430074, People's Republic of China., Xue T; State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, People's Republic of China.; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China., Zhang X; State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, People's Republic of China.; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China., Yang F; State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, People's Republic of China.; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China., Yu J; State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, People's Republic of China.; College of Forestry, Guizhou University, Guiyang 550025, People's Republic of China., Janssens SB; Meise Botanic Garden, Nieuwelaan 38, 1860 Meise, Belgium.; Department of Biology, KU Leuven, Kasteelpark Arenberg 31, 3001 Leuven, Belgium., Bussmann RW; Institute of Botany and Bakuriani Alpine Botanical Garden, Ilia State University, Botanical Street 1, 0105 Tbilisi, Georgia.; Department of Botany, State Museum for Natural History Karlsruhe, Erbprinzenstraße 13, 76133 Karlsruhe, Germany., Yu S; State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, People's Republic of China.; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China. |
| Abstrakt: |
Demonstrating the process of transregional biogeography and mechanisms underlying evolutionary radiations is crucial to understanding biological evolution. Here, we use Hydrangeeae (Hydrangeaceae), a tribe with a unique disjunct distribution and complex trait variations, using a solid phylogenetic framework, to investigate how geographical and climatic factors interact with functional traits to trigger plant evolutionary radiations. We constructed the first highly supported and dated phylogenetic framework using 79 protein-coding genes obtained from 81 plastomes, representing 63 species and all major clades, and found that most extant species originated from asynchronous diversification of two lineages undergoing repeated expansion and retraction, at middle and high latitudes of the Northern Hemisphere between East Asia and North America, during the Eocene to Pleistocene (driven by geologic and climatic dynamics). In accordance with these drivers, interactions of flora between central-eastern China and Japan occurred frequently after the Late Tertiary. We found that resource limitation and range fragmentation probably accelerated the diversification of Hydrangeeae, which supports the resource-use hypothesis. Our study sheds light on the evolutionary radiation and assembly of flora within East Asia, and the East Asian-North American disjunction, through integration of phylogenomic and biogeographic data with functional trait and ecological data. |
