Format: ORAL

Chih-Chieh Yu1, Qiu-Yue Zhang1, Wen-Na Ding1, 2, Richard H. Ree3, Yao-Wu Xing1

1 CAS Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, 666303 Mengla, China; 2 WSL, Swiss Federal Research Institute for Forest, Snow and Landscape, CH-8903 Birmensdorf, Switzerland 3 Life Sciences Section, Negaunee Integrative Research Center, Field Museum, Chicago, IL, 60605, USA

The high-altitude regions of the Andes and the Hengduan-Himalaya Mts. are home to some of the worlds most remarkable plant radiations. However, little is known whether these radiations are experienced similar or different diversification history.The high-altitude regions of the Andes and the Hengduan-Himalaya Mts. are home to some of the worlds most remarkable plant radiations. However, little is known whether these radiations are experienced similar or different diversification histories. In this study, we investigated the origin of the radiation of Berberis, an Andes and Hengduan-Himalaya Mts. (HHM) centered shrub clade. Our resultsrevealed that the net diversification rate of the HHM steadily rised since the Miocene, whilethe rate of net diversification in the Andes remained relatively flat during the same period . We recognized multiple trait-environment matchings evolved from the HHM unlike the Andes, and found such relationships were stepwise evolved along the diversification history of an alpine deciduous clade. Here, we unraveled a distinct but little-tested scenario for mountain radiation, in which sequential assembly of multiple enablers (i.e. key trait evolution, mountain uplift, and paleo-climate change) synergistically function as a trigger to maintain and promote the radiation.