Shifts from specialised to generalised pollination systems in Miconieae (Melastomataceae) and their relation with anther morphology and seed number

Plant Biology
V L G BritoR Goldenberg

Abstract

Most species in Melastomataceae have poricidal anthers related to specialised bee buzz-pollination, while some have anthers with large openings associated to non-bee pollination systems. We tracked the evolution of anther morphology and seed number on the Miconieae phylogenetic tree to understand the evolutionary shifts in such pollination systems. Anther morphometric data and seed number were recorded for 54 taxa. Pollinators (bees, flies, wasps) were recorded for 20 available species. Ancestral state reconstruction was made using Maximum Likelihood from nrITS sequences. We used phylogenetic eigenvector regressions to estimate phylogenetic signal and the adaptive component for these traits. Species pollinated by bees or bees and wasps tend to have smaller pores and fruits with more seeds. Species pollinated by flies or flies and bees and/or wasps tend to have larger pores and fruits with less seeds. Independent evolution occurred three times for anthers with large pores and twice for fruits with few seeds. We detected a phylogenetic signal in both traits, and negative correlated evolution between them. In actinomorphic small-flowered Miconieae, changes in anther morphology can be related to generalisation in the pollination sy...Continue Reading

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Jul 13, 2016·Annals of Botany·Marcelo Reginato, Fabián A Michelangeli
Oct 29, 2018·The New Phytologist·Agnes S DellingerJürg Schönenberger
Feb 9, 2021·Biodiversity Data Journal·Joe Chun Chia HuangGene Sheng Tung
Apr 18, 2021·The New Phytologist·Agnes S DellingerJürg Schönenberger
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