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dc.contributor.authorTremblay, Raymond L.
dc.contributor.authorPomales-Hernández, Grizel
dc.contributor.authorMéndez-Cintrón, María de Lourdes
dc.date.accessioned2015-11-21T21:31:39Z
dc.date.available2015-11-21T21:31:39Z
dc.date.issued2006-04
dc.identifier.issn0008-6452
dc.identifier.urihttp://hdl.handle.net/123456789/2646
dc.description.abstractPlants have theoretically multiple alternatives for preventing self pollination and consequently the effect of inbreeding, such as sequential flowering, dichogamy and self–incompatibility to name a few. We investigated the reproductive biology of three sequentially flowering (acropetal) endemic orchids from Puerto Rico. Since sequential flowering is present in the studied species and very rarely (1.0%) is there more than one flower open simultaneously on an inflorescence, we hypothesized that the orchids should be self-compatible and show no effect of protandry (dichogamy). We performed hand self—and crosspollinations and evaluated whether the species are self-compatible and whether the receptivity to pollination success (fruit set) is influenced by the age of flowers (protandry). We define protandry as pertaining to a hermaphroditic organism that assumes a functional male condition prior to shifting to a functional female state. We found that all three species are self-incompatible. Furthermore, flower age is important for predicting the likelihood of fruits set. Older flowers (6+ days) are significantly more likely to produce fruits (functional protandry). The multiple mechanisms for preventing self-pollination (sequential flowering, dichogamy and self-incompatibility) that are noted for these species suggest that the historical evolutionary processes for preventing inbreeding may be complex. We hypothesized that because multiple mechanisms are present for preventing self-pollination inbreeding depression is likely to be high.
dc.description.sponsorshipCollege of Arts and Sciences University of Puerto Rico, Mayagüez
dc.language.isoen_US
dc.publisherCaribbean Journal of Science, Vol. 42, No. 1, 75-80, 2006
dc.subjectLepanthes
dc.subjectPuerto Rico
dc.subjectreproductive success
dc.subjectdichogamy
dc.subjectself-incompatible
dc.titleFlower Phenology and Sexual Maturation: Partial Protandrous Behavior in Three Species of Orchids
dc.typeArticle


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