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Abstract Detail


Tropical Biology Section

Molina, Jeanmaire [1], Green, Ed [1], Struwe, Lena [1].

Phenology and pollination of the ancestral grape relative Leea (Leeaceae/Vitaceae).

THE genus Leea is the closest relative of the grape family, Vitaceae, but its systematics and ecology are unknown. This project summarizes results from field work concerning the phenology, self-compatibility and pollination of 3 Leea species in the 16-ha Palanan Forest Dynamics Plot (PFDP) in the Philippines. In spite of the cleistogamous floral architecture, Leea is non-autogamous, protandrous and dependent on insect-pollination. Due to its large cymose inflorescence, it may be geitonogamous, which may cause inbreeding depression. We determined that Leea can mitigate the costs of geitonogamy by selecting against synchronous co-occurrence of functional male and female flowers in an inflorescence. Two Leea species are also suspected to hybridize resulting in an intermediate morph. Flowering peaks of the putative parental species coincide and both species shared the same pollinators, suggesting the possibility of interspecific pollination. Bees and wasps frequented the white-flowering morphospecies, while butterflies are more associated with the red-flowered L. guineensis. Jewel beetles, tipulid flies, weevils and spiders were also seen on L. guineensis, though actual pollinators need to be determined. Mite symbiosis was also observed, but mite presence was not found to be significantly associated with flower vigor or with any particular stage of flowering. Light, time of the day, soil moisture and pH were also found to affect flowering and fruiting phenologies.


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1 - Rutgers University, Ecology, Evolution, & Natural Resources, 14 College Farm Rd, New Brunswick, New Jersey, 08901, USA

Keywords:
pollination
breeding system
tropical rain forest
speciation
phenology.

Presentation Type: Poster:Posters for Sections
Session: 48-214
Location: Auditorium/Bell Memorial Union
Date: Tuesday, August 1st, 2006
Time: 12:30 PM
Abstract ID:537


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