To each their own! Nectar plasticity within a flower mediates distinct ecological interactions

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dc.contributor.authorBalduino, Hannelise de Kassia [UNESP]
dc.contributor.authorTunes, Priscila [UNESP]
dc.contributor.authorGiordano, Emanuele
dc.contributor.authorGuarnieri, Massimo
dc.contributor.authorMachado, Silvia Rodrigues [UNESP]
dc.contributor.authorNepi, Massimo
dc.contributor.authorGuimarães, Elza [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversity of Siena
dc.contributor.institutionNational Biodiversity Future Center (NBFC)
dc.date.accessioned2023-07-29T16:11:56Z
dc.date.available2023-07-29T16:11:56Z
dc.date.issued2023-02-01
dc.description.abstractNuptial and extranuptial nectaries are involved in interactions with different animal functional groups. Nectar traits involved in pollination mutualisms are well known. However, we know little about those traits involved in other mutualisms, such as ant-plant interactions, especially when both types of nectaries are in the same plant organ, the flower. Here we investigated if when two types of nectaries are exploited by distinct functional groups of floral visitors, even being within the same plant organ, the nectar secreted presents distinct features that fit animal requirements. We compared nectar secretion dynamics, floral visitors and nectar chemical composition of both nuptial and extranuptial nectaries in natural populations of the liana Amphilophium mansoanum (Bignoniaceae). For that we characterized nectar sugar, amino acid and specialized metabolite composition by high-performance liquid chromatography. Nuptial nectaries were visited by three medium- and large-sized bee species and extranuptial nectaries were visited mainly by ants, but also by cockroaches, wasps and flies. Nuptial and extranuptial nectar differed regarding volume, concentration, milligrams of sugars per flower and secretion dynamics. Nuptial nectar was sucrose-dominated, with high amounts of γ-aminobutyric acid and β-aminobutyric acid and with theophylline-like alkaloid, which were all exclusive of nuptial nectar. Whereas extranuptial nectar was hexose-rich, had a richer and less variable amino acid chemical profile, with high amounts of serine and alanine amino acids and with higher amounts of the specialized metabolite tyramine. The nectar traits from nuptial and extranuptial nectaries differ in energy amount and nutritional value, as well as in neuroactive specialized metabolites. These differences seem to match floral visitors' requirements, since they exclusively consume one of the two nectar types and may be exerting selective pressures on the composition of the respective resources of interest.en
dc.description.affiliationGraduate Course in Plant Biology São Paulo State University
dc.description.affiliationLaboratory of Ecology and Evolution of Plant-Animal Interactions Institute of Biosciences São Paulo State University
dc.description.affiliationLaboratory of Analytical Methods for Chemical Ecology - Plant Reproductive Biology Department of Life Sciences University of Siena
dc.description.affiliationLaboratory of Plant Anatomy Institute of Biosciences São Paulo State University
dc.description.affiliationNational Biodiversity Future Center (NBFC)
dc.description.affiliationUnespGraduate Course in Plant Biology São Paulo State University
dc.description.affiliationUnespLaboratory of Ecology and Evolution of Plant-Animal Interactions Institute of Biosciences São Paulo State University
dc.description.affiliationUnespLaboratory of Plant Anatomy Institute of Biosciences São Paulo State University
dc.identifierhttp://dx.doi.org/10.1093/aobpla/plac067
dc.identifier.citationAoB PLANTS, v. 15, n. 2, 2023.
dc.identifier.doi10.1093/aobpla/plac067
dc.identifier.issn2041-2851
dc.identifier.scopus2-s2.0-85153370031
dc.identifier.urihttp://hdl.handle.net/11449/249885
dc.language.isoeng
dc.relation.ispartofAoB PLANTS
dc.sourceScopus
dc.subjectAmino acids
dc.subjectAmphilophium mansoanum
dc.subjectants
dc.subjectbee pollination
dc.subjectextranuptial nectary
dc.subjectnectar chemical composition
dc.subjectnectar secretion dynamics
dc.subjectneuroactive specialized metabolites
dc.subjectnuptial nectary
dc.titleTo each their own! Nectar plasticity within a flower mediates distinct ecological interactionsen
dc.typeArtigo

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