plants Article Floral Scent Evolution in the Genus Jaborosa (Solanaceae): Influence of Ecological and Environmental Factors Marcela Moré 1,* , Florencia Soteras 1, Ana C. Ibañez 1, Stefan Dötterl 2 , Andrea A. Cocucci 1 and Robert A. Raguso 3,* 1 Laboratorio de Ecología Evolutiva y Biología Floral, Instituto Multidisciplinario de Biología Vegetal (CONICET-Universidad Nacional de Córdoba), Córdoba CP 5000, Argentina;
[email protected] (F.S.);
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[email protected] (A.A.C.) 2 Department of Biosciences, Paris-Lodron-University of Salzburg, 5020 Salzburg, Austria;
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[email protected] (R.A.R.) Abstract: Floral scent is a key communication channel between plants and pollinators. However, the contributions of environment and phylogeny to floral scent composition remain poorly understood. In this study, we characterized interspecific variation of floral scent composition in the genus Jaborosa Juss. (Solanaceae) and, using an ecological niche modelling approach (ENM), we assessed the environmental variables that exerted the strongest influence on floral scent variation, taking into account pollination mode and phylogenetic relationships. Our results indicate that two major evolutionary themes have emerged: (i) a ‘warm Lowland Subtropical nectar-rewarding clade’ with large white hawkmoth pollinated flowers that emit fragrances dominated by oxygenated aromatic or Citation: Moré, M.; Soteras, F.; sesquiterpenoid volatiles, and (ii) a ‘cool-temperate brood-deceptive clade’ of largely fly-pollinated Ibañez, A.C.; Dötterl, S.; Cocucci, species found at high altitudes (Andes) or latitudes (Patagonian Steppe) that emit foul odors including A.A.; Raguso, R.A.