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Adaptive function of duodichogamy: Why do chestnut trees have two pollen emission phases?

hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
hal.structure.identifierEcosystèmes forestiers [UR EFNO]
dc.contributor.authorPAULY, Grégoire
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
hal.structure.identifierInvenio
dc.contributor.authorLARUE, Clément
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorPETIT, Rémy
dc.date.accessioned2023-11-20T17:24:41Z
dc.date.available2023-11-20T17:24:41Z
dc.date.issued2023-07-13
dc.identifier.issn0002-9122
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/185772
dc.description.abstractEnPremise: Intersexual mating facilitation in flowering plants has been largely underexplored. Duodichogamy is a rare flowering system in which individual plants flower in the sequence male-female-male. We studied the adaptive advantages of this flowering system using chestnuts (Castanea spp., Fagaceae) as models. These insectpollinated trees produce many unisexual male catkins responsible for a first staminate phase and a few bisexual catkins responsible for a second staminate phase. We hypothesized that duodichogamy increases female mating success by facilitating pollen deposition on stigmas of the rewardless female flowers through their proximity with attractive male flowers responsible for the minor staminate phase. Methods: We monitored insect visits to 11 chestnut trees during the entire flowering period and explored reproductive traits of all known duodichogamous species using published evidence. Results: In chestnuts, insects visited trees more frequently during the first staminate phase but visited female flowers more frequently during the second staminate phase. All 21 animal-pollinated duodichogamous species identified are mass-flowering woody plants at high risk of self-pollination. In 20 of 21 cases, gynoecia (female flower parts) are located close to androecia (male flower parts), typically those responsible for the second minor staminate phase, whereas androecia are often distant from gynoecia. Conclusions: Our results suggest that duodichogamy increases female mating success by facilitating pollen deposition on stigmas by means of the attractiveness of the associated male flowers while effectively limiting self-pollination.
dc.language.isoen
dc.publisherBotanical Society of America
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/
dc.subject.encalyptrate flies
dc.subject.enCastanea
dc.subject.enFagaceae
dc.subject.enfemale mating success
dc.subject.engeitonogamy
dc.subject.eninsect pollination
dc.subject.enmating facilitation
dc.subject.enmonoecious
dc.subject.enself-pollination
dc.subject.ensoldier beetle
dc.title.enAdaptive function of duodichogamy: Why do chestnut trees have two pollen emission phases?
dc.typeArticle de revue
dc.identifier.doi10.1002/ajb2.16204
dc.subject.halSciences de l'environnement/Biodiversité et Ecologie
bordeaux.journalAmerican Journal of Botany
bordeaux.volume110
bordeaux.hal.laboratoriesBioGeCo (Biodiversité Gènes & Communautés) - UMR 1202*
bordeaux.issue8
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionINRAE
hal.identifierhal-04214912
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-04214912v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=American%20Journal%20of%20Botany&rft.date=2023-07-13&rft.volume=110&rft.issue=8&rft.eissn=0002-9122&rft.issn=0002-9122&rft.au=PAULY,%20Gr%C3%A9goire&LARUE,%20Cl%C3%A9ment&PETIT,%20R%C3%A9my&rft.genre=article


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