ArticleNature communications2026
Divergent genome fractionation and adaptation following polyploidy in the Araliaceae.
Article in Nature communications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Cyclic polyploidization/diploidization is a driving force in the evolution of eukaryotes. It remains unclear how post-polyploidy reshuffling of ancestral genomes is correlated with evolutionary and ecological diversification. The Araliaceae consists of > 1500 diverse species of herbs, shrubs and trees, which have undergone several polyploidization/diploidization events and have adapted to different forest ecosystem habitats. Here, by leveraging 20 genomes/subgenomes and 561 transcriptomes, we demonstrate that the genome architecture and transcriptional landscape of extant Araliaceae have undergone remodeling associated with polyploidizations/diploidizations. Phenotypic comparisons revealed that phylogenetically distinct species of the Araliaceae have repeatedly evolved shade- and open-habitat phenotypes, accompanied by leaf morphology, efficiency of photosynthesis and carbon fixation. Biased genetic fractionation and transcriptional remodeling of the photomorphogenesis (e.g. PhyB and PIFs) and photosynthesis (e.g. Lhcb-1 and Rubisco) networks are associated with this ecological adaptation. Our study provides evidence that post-polyploidy reshuffling and fractionation correlate with phenotypic and ecological diversification.
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