Sapromyiophily in the native orchid, Bulbophyllum variegatum, on Réunion (Mascarene Archipelago, Indian Ocean)
| Autor: | Laurence Humeau, Claire Micheneau, Thierry Pailler, Hans Jacquemyn, Anne Gauvin-Bialecki, Jacques Fournel |
|---|---|
| Přispěvatelé: | Peuplements végétaux et bioagresseurs en milieu tropical (UMR PVBMT), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Université de La Réunion (UR), Université Libre de Bruxelles [Bruxelles] (ULB), Catholic University of Leuven - Katholieke Universiteit Leuven (KU Leuven), Laboratoire de Chimie des Substances Naturelles et des Sciences des Aliments (LCSNSA), Université de La Réunion (UR), Institut de Recherche pour le Développement (IRD)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Université de La Réunion (UR)-Institut National de la Recherche Agronomique (INRA), Université libre de Bruxelles (ULB) |
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
0106 biological sciences
Orchidaceae biology Pollination Outcrossing medicine.disease_cause biology.organism_classification Pollination syndrome 010603 evolutionary biology 01 natural sciences Bulbophyllum Platystomatidae Pollinator Pollen Botany medicine [CHIM]Chemical Sciences Ecology Evolution Behavior and Systematics 010606 plant biology & botany |
| Zdroj: | Journal of Tropical Ecology Journal of Tropical Ecology, Cambridge University Press (CUP), 2011, 27 (06), pp.591--599. ⟨10.1017/S0266467411000411⟩ |
| ISSN: | 0266-4674 1469-7831 |
| DOI: | 10.1017/S0266467411000411⟩ |
| Popis: | Orchid species are well known for their highly specialized pollinator interactions. To better understand the reproductive biology of the tropical epiphytic orchid Bulbophyllum variegatum on Réunion, we investigated the floral morphology, breeding system, pollinator diversity, floral scent profile and fruiting success of about 30 individuals in three natural populations during two consecutive flowering seasons. Controlled hand-pollination experiments in two populations showed that the species is self-compatible, but requires pollinator service to achieve reproduction. Videotape pollinator observations were conducted during two flowering seasons for 56 h and revealed that B. variegatum is pollinated by a single species of fly from the Platystomatidae. This fly seems to be attracted by the unpleasant scent produced by the flowers, and does not receive any reward after achieving pollination. In addition, no egg-laying behaviour was observed. Bulbophyllum variegatum thus exhibits a typical sapromyiophilous pollination syndrome which constitutes the first proven case of sapromyiophily within the genus Bulbophyllum on the Mascarene Archipelago. Hand pollinations further showed that fruit set was not significantly higher for flowers that received outcross pollen than for those that were self-crossed (53% and 44% respectively). Fruit sets under natural conditions were significantly different among populations, ranging from 0.5% to 24.3%. This low fruit production is likely due to infrequent pollinator visits, particularly in disturbed forests where the pollinator has never been observed. |
| Databáze: | OpenAIRE |
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