Repeated Evolution of Storage Root and Invasions of Alpine Biome Drove Replicated Radiations of the Megadiverse Corydalis (Papaveraceae) in the Qinghai–Tibet Plateau

作者：Huan‐Wen Peng, Yuan‐Yuan Ling, Kun‐Li Xiang, Andrey S. Erst, Xiaoqian Li, Lian Lian, Bing Liu, Tatyana V. Erst, Rosa del C. Ortiz, Florian Jabbour, Wei Wang · 发表于：Systematic Biology · 年份：2025 · DOI：10.1093/sysbio/syaf014 · 被引用次数：10 · 研究领域：Plant Diversity and Evolution、Plant Pathogens and Fungal Diseases、Plant Ecology and Taxonomy Studies

-The interplay of key innovation and ecological opportunity is commonly recognized to be the catalyst for rapid radiation. Underground storage organs (USOs), as a vital ecological trait, are advantageous for the adaptation of plants to extreme environments, but receive less attention compared to aboveground organs. Repeated evolution of various USOs has occurred across the plant tree of life. However, whether repeated occurrences of a USO in different clades of a group can promote its replicated radiations in combination with the invasion of similar environments remains poorly known. Corydalis is a megadiverse genus in Papaveraceae and exhibits remarkable variations in USO morphology and biome occupancy. Here, we first generated a robust phylogeny for Corydalis with wide taxonomic and genomic coverage based on plastome and nuclear ribosomal DNA sequence data. By dating the branching events, reconstructing ancestral ranges, evaluating diversification dynamics, and inferring evolutionary patterns of USOs and biomes and their correlations, we then tested whether the interplay of USO evolution and biome shifts has driven rapid diversification of some Corydalis lineages. Our results indicate that Corydalis began to diversify in the Qinghai-Tibet Plateau (QTP) at ca. 41 Ma, and 88% of dispersals happened through forests, suggesting that forests served as important dispersal corridors for range expansion of the genus. The storage root has originated independently at least 6 times in...