The role of pollinators in floral diversification in a clade of generalist flowers

Evolution; International Journal of Organic Evolution
José M GómezJuan Lorite

Abstract

Pollinator-mediated evolutionary divergence has seldom been explored in generalist clades because it is assumed that pollinators in those clades exert weak and conflicting selection. We investigate whether pollinators shape floral diversification in a pollination generalist plant genus, Erysimum. Species from this genus have flowers that appeal to broad assemblages of pollinators. Nevertheless, we recently reported that it is possible to sort plant species into pollination niches varying in the quantitative composition of pollinators. We test here whether floral characters of Erysimum have evolved as a consequence of shifts among pollination niches. For this, we quantified the evolutionary lability of the floral traits and their phylogenetic association with pollination niches. As with pollination niches, Erysimum floral traits show weak phylogenetic signal. Moreover, floral shape and color are phylogenetically associated with pollination niche. In particular, plants belonging to a pollination niche dominated by long-tongued large bees have lilac corollas with parallel petals. Further analyses suggest, however, that changes in color preceded changes in pollination niche. Pollinators seem to have driven the evolution of corolla ...Continue Reading

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Citations

Mar 20, 2016·Annals of Botany·Rainer Melzer, Günter Theißen
Oct 26, 2016·The Journal of Animal Ecology·Federico D SazatornilFelipe W Amorim
Dec 28, 2017·Evolution; International Journal of Organic Evolution·Stacey D Smith, Ricardo Kriebel
Aug 14, 2018·Journal of Evolutionary Biology·Katherine E Eisen, Monica A Geber
Sep 27, 2018·Evolution; International Journal of Organic Evolution·Florian P SchiestlDaniel D Gervasi
Mar 9, 2019·The Journal of Heredity·Jordan A DowellChase M Mason
Mar 3, 2019·Journal of Experimental Botany·Lachezar A Nikolov
Dec 14, 2017·Evolution; International Journal of Organic Evolution·Simon JolyJohn L Clark
Aug 13, 2020·Nature Communications·José M GómezRubén Torices
Dec 17, 2017·American Journal of Botany·Ghadeer BukhariWenheng Zhang

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