| Title: | Floral Scent Evolution in the Genus Jaborosa (Solanaceae): Influence of Ecological and Environmental Factors |
| Author(s): | More M; Soteras F; Ibanez AC; Dotterl S; Cocucci AA; Raguso RA; |
| Address: | "Laboratorio de Ecologia Evolutiva y Biologia Floral, Instituto Multidisciplinario de Biologia Vegetal (CONICET-Universidad Nacional de Cordoba), Cordoba CP 5000, Argentina. Department of Biosciences, Paris-Lodron-University of Salzburg, 5020 Salzburg, Austria. Department of Neurobiology and Behavior, Cornell University, Ithaca, NY 14853, USA" |
| ISSN/ISBN: | 2223-7747 (Print) 2223-7747 (Electronic) 2223-7747 (Linking) |
| 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 sesquiterpenoid volatiles, and (ii) a 'cool-temperate brood-deceptive clade' of largely fly-pollinated species found at high altitudes (Andes) or latitudes (Patagonian Steppe) that emit foul odors including cresol, indole and sulfuric volatiles. The joint consideration of floral scent profiles, pollination mode, and geoclimatic context helped us to disentangle the factors that shaped floral scent evolution across 'pollinator climates' (geographic differences in pollinator abundance or preference). Our findings suggest that the ability of plants in the genus Jaborosa to colonize newly formed habitats during Andean orogeny was associated with striking transitions in flower scent composition that trigger specific odor-driven behaviors in nocturnal hawkmoths and saprophilous fly pollinators" |
| Keywords: | South America brood-site deceptive flowers ecological niche modelling flower scent fly pollination hawkmoth pollination nightshades pollinator shift; |
| Notes: | "PubMed-not-MEDLINEMore, Marcela Soteras, Florencia Ibanez, Ana C Dotterl, Stefan Cocucci, Andrea A Raguso, Robert A eng FONCYT BID 2018 PICT 692 to MM/Agencia Nacional de Promocion Cientifica y Tecnologica/ Switzerland 2021/08/29 Plants (Basel). 2021 Jul 23; 10(8):1512. doi: 10.3390/plants10081512" |
