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dc.creatorNarbona, Eduardoes
dc.creatorOrtiz Ballesteros, Pedro Luises
dc.creatorArista Palmero, Montserrates
dc.date.accessioned2016-10-25T10:53:33Z
dc.date.available2016-10-25T10:53:33Z
dc.date.issued2011
dc.identifier.citationNarbona, E., Ortiz Ballesteros, P.L. y Arista Palmero, M. (2011). Linking Self-Incompatibility, Dichogamy, and Flowering Synchrony in Two Euphorbia Species: Alternative Mechanisms for Avoiding Self-Fertilization?. PLOS ONE, 6 (6), 1-9.
dc.identifier.issn1932-6203es
dc.identifier.urihttp://hdl.handle.net/11441/48091
dc.description.abstractBackground: Plant species have several mechanisms to avoid selfing such as dichogamy or a self-incompatibility response. Dichogamy in a single flower may reduce autogamy but, to avoid geitonogamy, plants must show flowering synchronization among all their flowers (i.e. synchronous dichogamy). It is hypothesized that one species would not simultaneously show synchronous dichogamy and self-incompatibility because they are redundant mechanisms to reduce selfing; however, this has not been accurately assessed. Methodology/Principal Findings: This expectation was tested over two years in two natural populations of the closely related Mediterranean spurges Euphorbia boetica and E. nicaeensis, which completely avoid autogamy by protogyny at the cyathia level. Both spurges showed a high population synchrony (Z,79), and their inflorescences flower synchronously. In E. nicaeensis, there was no overlap among the cyathia in anthesis of successive inflorescence levels and the overlap between sexual phases of cyathia of the same inflorescence level was uncommon (4–16%). In contrast, E. boetica showed a high overlap among consecutive inflorescence levels (74–93%) and between sexual phases of cyathia of the same inflorescence level (48–80%). The flowering pattern of both spurges was consistent in the two populations and over the two successive years. A hand-pollination experiment demonstrated that E. nicaeensis was strictly self-compatible whereas E. boetica was partially self-incompatible. Conclusions/Significance: We propose that the complex pattern of synchronized protogyny in E. nicaeensis prevents geitonogamous crosses and, consequently, avoids selfing and inbreeding depression. In E. boetica, a high probability of geitonogamous crosses may occur but, alternatively, this plant escapes selfing through a self-incompatibility response. We posit that synchronous dichogamy and physiological self-incompatibility do not co-occur in the same species because each process is sufficiently effective in avoiding self-fertilization.es
dc.description.sponsorshipEspaña Ministerio de Ciencia y Tecnología PLO CGL2005-03731; CGL2008-02533-Ees
dc.description.sponsorshipEspaña Ministerio de Ciencia y Tecnología MA CGL2009-08257es
dc.formatapplication/pdfes
dc.language.isoenges
dc.publisherLibrary of Sciencees
dc.relation.ispartofPLOS ONE, 6 (6), 1-9.
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional*
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.titleLinking Self-Incompatibility, Dichogamy, and Flowering Synchrony in Two Euphorbia Species: Alternative Mechanisms for Avoiding Self-Fertilization?es
dc.typeinfo:eu-repo/semantics/articlees
dc.type.versioninfo:eu-repo/semantics/publishedVersiones
dc.rights.accessrightsinfo:eu-repo/semantics/openAccesses
dc.contributor.affiliationUniversidad de Sevilla. Departamento de Biología Vegetal y Ecologíaes
dc.relation.publisherversionhttp://journals.plos.org/plosone/article?id=10.1371/journal.pone.0020668es
dc.identifier.doi10.1371/journal.pone.0020668es
idus.format.extent8 p.es
dc.journaltitlePLOS ONEes
dc.publication.volumen6es
dc.publication.issue6es
dc.publication.initialPage1es
dc.publication.endPage9es
dc.identifier.idushttps://idus.us.es/xmlui/handle/11441/48091
dc.contributor.funderMinisterio de Ciencia y Tecnología (MCYT). España

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