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Relative impact of mate versus pollinator availability on pollen limitation and outcrossing rates in a mass-flowering species

hal.structure.identifierSanté et agroécologie du vignoble [UMR SAVE]
hal.structure.identifierEvolution et Diversité Biologique [EDB]
dc.contributor.authorDELMAS, Chloé E. L.
hal.structure.identifierEvolution et Diversité Biologique [EDB]
dc.contributor.authorESCARAVAGE, Nathalie
hal.structure.identifierUniversité de Montpellier [UM]
dc.contributor.authorCHEPTOU, Pierre Olivier
hal.structure.identifierEvolution et Diversité Biologique [EDB]
dc.contributor.authorCHARRIER, Olivia
hal.structure.identifierInstitut National de la Recherche Agronomique [INRA]
dc.contributor.authorRUZAFA, Sophie
hal.structure.identifierUniversité Toulouse III - Paul Sabatier [UT3]
dc.contributor.authorWINTERTON, Peter
hal.structure.identifierEvolution et Diversité Biologique [EDB]
dc.contributor.authorPORNON, André
dc.date.accessioned2024-04-08T12:33:01Z
dc.date.available2024-04-08T12:33:01Z
dc.date.issued2015
dc.identifier.issn1435-8603
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/197169
dc.description.abstractEnPlant mating systems are driven by several pre-pollination factors, including pollinator availability, mate availability and reproductive traits. We investigated the relative contributions of these factors to pollination and to realized outcrossing rates in the patchily distributed mass-flowering shrub Rhododendron ferrugineum. We jointly monitored pollen limitation (comparing seed set from intact and pollen-supplemented flowers), reproductive traits (herkogamy, flower size and autofertility) and mating patterns (progeny array analysis) in 28 natural patches varying in the level of pollinator availability (flower visitation rates) and of mate availability (patch floral display estimated as the total number of inflorescences per patch). Our results showed that patch floral display was the strongest determinant of pollination and of the realized outcrossing rates in this mass-flowering species. We found an increase in pollen limitation and in outcrossing rates with increasing patch floral display. Reproductive traits were not significantly related to patch floral display, while autofertility was negatively correlated to outcrossing rates. These findings suggest that mate limitation, arising from high flower visitation rates in small plant patches, resulted in low pollen limitation and high selfing rates, while pollinator limitation, arising from low flower visitation rates in large plant patches, resulted in higher pollen limitation and outcrossing rates. Pollinator-mediated selfing and geitonogamy likely alleviates pollen limitation in the case of reduced mate availability, while reduced pollinator availability (intraspecific competition for pollinator services) may result in the maintenance of high outcrossing rates despite reduced seed production.
dc.language.isoen
dc.publisherWiley
dc.subjectFloral display
dc.subjectinsect visits
dc.subjectpollen limitation
dc.subject.enmass flowering
dc.subject.enoutcrossing rate
dc.subject.enreproductive traits
dc.subject.enRhododendron ferrugineum
dc.subject.enself-incompatibility
dc.title.enRelative impact of mate versus pollinator availability on pollen limitation and outcrossing rates in a mass-flowering species
dc.typeArticle de revue
dc.identifier.doi10.1111/plb.12200
dc.subject.halSciences du Vivant [q-bio]
bordeaux.journalPlant Biology
bordeaux.page209-218
bordeaux.volume17
bordeaux.hal.laboratoriesSanté et Agro-Ecologie du Vignoble (SAVE) - UMR 1065*
bordeaux.issue1
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-02633317
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02633317v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Plant%20Biology&rft.date=2015&rft.volume=17&rft.issue=1&rft.spage=209-218&rft.epage=209-218&rft.eissn=1435-8603&rft.issn=1435-8603&rft.au=DELMAS,%20Chlo%C3%A9%20E.%20L.&ESCARAVAGE,%20Nathalie&CHEPTOU,%20Pierre%20Olivier&CHARRIER,%20Olivia&RUZAFA,%20Sophie&rft.genre=article


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