Putative floral brood-site mimicry, loss of autonomous selfing, and reduced vegetative growth are significantly correlated with increased diversification in Asarum (Aristolochiaceae).

摘要: The drivers of angiosperm diversity have long been sought and the flower-arthropod association has often invoked as most powerful driver radiation. We now know that features influence arthropod interactions cannot only affect diversification lineages, but also expedite or constrain their rate extinction, which can equally observed asymmetric richness extant lineages. genus Asarum (Aristolochiaceae; ∼100 species) is widely distributed in north temperate forests, with substantial vegetative floral divergence between its three major clades, Euasarum, Geotaenium, Heterotropa. used Binary-State Speciation Extinction Model (BiSSE) Net Diversification tests character state distributions on a Maximum Likelihood phylogram Coalescent Bayesian species tree, inferred from seven chloroplast markers nuclear rDNA, to test for signal diversification, transition, extinction rates characters. found reduction growth, loss autonomous self-pollination, presence putative fungal-mimicking structures are significantly correlated increased Asarum. No significant difference model likelihood was identified symmetric transitions extinction. conclude flowers Heterotropa clade may converged some aspects basidiomycete sporocarp morphology brood-site mimicry, coupled growth driven within