Temporal variation in pollinarium size after its removal in species of Bulbophyllum: a different mechanism preventing self-pollination in Orchidaceae

dc.creatorBorba, EL
dc.creatorSemir, J
dc.date1999
dc.date2014-12-02T16:29:10Z
dc.date2015-11-26T16:38:49Z
dc.date2014-12-02T16:29:10Z
dc.date2015-11-26T16:38:49Z
dc.date.accessioned2018-03-28T23:22:18Z
dc.date.available2018-03-28T23:22:18Z
dc.identifierPlant Systematics And Evolution. Springer-verlag Wien, v. 217, n. 41732, n. 197, n. 204, 1999.
dc.identifier0378-2697
dc.identifierWOS:000081237700003
dc.identifier10.1007/BF00984365
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/78519
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/78519
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/78519
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1272323
dc.descriptionIn Bulbophyllum involutum and B. ipanemense (Orchidaceae), two closely related species, shortly after removal the pollinarium has a diameter of approximately twice that of the entrance of the stigmatic cavity, requiring a mean time of 105 to 135 minutes to shrink in width and allow pollination. Because the pollinators of these species remain for some minutes in the same flower after removing the pollinia this mechanism, previously unknown in Orchidaceae, may be very important in preventing self-pollination. This mechanism does not occur in B. weddellii, and the pollinator does not remain in the flower after removing the pollinia. The smaller diameter of the stigmatic cavity in B. involutum reduces by 50% the chances of interspecific pollination with B. weddellii, and interspecific crossing is strictly unidirectional. This is important in maintaining isolation between these sympatric species, which share the same pollinators and have synchronized flowering.
dc.description217
dc.description41732
dc.description197
dc.description204
dc.languageen
dc.publisherSpringer-verlag Wien
dc.publisherVienna
dc.publisherAustria
dc.relationPlant Systematics And Evolution
dc.relationPlant Syst. Evol.
dc.rightsfechado
dc.rightshttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dc.sourceWeb of Science
dc.subjectOrchidaceae
dc.subjectBulbophyllum
dc.subjectpollination
dc.subjectreproductive system
dc.subjectself-pollination
dc.subjectpollinator behaviour
dc.subjectmyophily
dc.subjectpollinia
dc.subjectFruit Production
dc.subjectEvolution
dc.titleTemporal variation in pollinarium size after its removal in species of Bulbophyllum: a different mechanism preventing self-pollination in Orchidaceae
dc.typeArtículos de revistas


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