{"title":"Ontogenetic Mechanisms of Differentiation in Two Salvia Species With Different Pollinators","authors":"Agustín Davies, Santiago Benitez-Vieyra","doi":"10.1111/ede.70006","DOIUrl":null,"url":null,"abstract":"<div>\n \n <p>Shifts between pollinators are a major driver in the evolution and diversification of angiosperms and often involve major changes in flower morphology. These morphological differences typically originate during development, highlighting the importance of integrating ecological and developmental studies. Corolla tube length, in particular, is a key trait in specialized plant-pollinator interactions. Here, we compared flower development in two closely related <i>Salvia</i> species with contrasting corolla tube lengths: <i>Salvia guaranitica</i>, pollinated by hummingbirds, and <i>Salvia stachydifolia</i>, primarily pollinated by bees. We characterized developmental trajectories, floral development duration, and patterns of cell growth and proliferation. Both species shared similar allometric trajectories, differing only in their prolongation, suggesting ontogenetic scaling. However, <i>S. guaranitica</i> exhibited longer and faster corolla tube growth, resulting in a larger final size compared to <i>S. stachydifolia</i>. Corolla tube growth was linked to cell proliferation during the early stages of bud development and rapid anisotropic cell elongation in later stages. Additionally, we observed differences in anisotropic growth rates across basal, middle, and distal regions of the corolla tube. These findings suggest that shifts between pollination syndromes in <i>Salvia</i> species may occur without major changes to basic developmental patterns, but through ontogenetic scaling accompanied by heterochronic changes.</p></div>","PeriodicalId":12083,"journal":{"name":"Evolution & Development","volume":"27 2","pages":""},"PeriodicalIF":2.6000,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Evolution & Development","FirstCategoryId":"99","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/ede.70006","RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"DEVELOPMENTAL BIOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Shifts between pollinators are a major driver in the evolution and diversification of angiosperms and often involve major changes in flower morphology. These morphological differences typically originate during development, highlighting the importance of integrating ecological and developmental studies. Corolla tube length, in particular, is a key trait in specialized plant-pollinator interactions. Here, we compared flower development in two closely related Salvia species with contrasting corolla tube lengths: Salvia guaranitica, pollinated by hummingbirds, and Salvia stachydifolia, primarily pollinated by bees. We characterized developmental trajectories, floral development duration, and patterns of cell growth and proliferation. Both species shared similar allometric trajectories, differing only in their prolongation, suggesting ontogenetic scaling. However, S. guaranitica exhibited longer and faster corolla tube growth, resulting in a larger final size compared to S. stachydifolia. Corolla tube growth was linked to cell proliferation during the early stages of bud development and rapid anisotropic cell elongation in later stages. Additionally, we observed differences in anisotropic growth rates across basal, middle, and distal regions of the corolla tube. These findings suggest that shifts between pollination syndromes in Salvia species may occur without major changes to basic developmental patterns, but through ontogenetic scaling accompanied by heterochronic changes.
期刊介绍:
Evolution & Development serves as a voice for the rapidly growing research community at the interface of evolutionary and developmental biology. The exciting re-integration of these two fields, after almost a century''s separation, holds much promise as the focus of a broader synthesis of biological thought. Evolution & Development publishes works that address the evolution/development interface from a diversity of angles. The journal welcomes papers from paleontologists, population biologists, developmental biologists, and molecular biologists, but also encourages submissions from professionals in other fields where relevant research is being carried out, from mathematics to the history and philosophy of science.