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Pollination mutualism between Alocasia macrorrhizos (Araceae) and two taxonomically undescribed Colocasiomyia species (Diptera: Drosophilidae) in Sabah, Borneo

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Title: Pollination mutualism between Alocasia macrorrhizos (Araceae) and two taxonomically undescribed Colocasiomyia species (Diptera: Drosophilidae) in Sabah, Borneo
Authors: Takano, Kohei Takenaka Browse this author
Repin, Rimi Browse this author
Mohamed, Dartin Maryati Bte Browse this author
Toda, Masanori J. Browse this author →KAKEN DB
Keywords: Colocasiomyia sp.1 aff. sulawesiana
Colocasiomyia sp.2 aff. sulawesiana
Kota Kinabalu
life history
pistilicolous species
pollination experiment
Issue Date: Jul-2012
Publisher: Wiley-Blackwell
Journal Title: Plant Biology
Volume: 14
Issue: 4
Start Page: 555
End Page: 564
Publisher DOI: 10.1111/j.1438-8677.2011.00541.x
Abstract: Two taxonomically undescribed Colocasiomyia species were discovered from inflorescences of Alocasia macrorrhizos in Kota Kinabalu City, Sabah, Borneo, Malaysia. The aims of this study were to investigate the reproductive ecology of the flies and the plant, ascertain the importance of the flies as pollinators and examine the intimate association between flowering events and life history of the flies. We conducted sampling, observations and field pollination experiments. The flies were attracted by the odour of female-phase inflorescences in the early morning on the first day of anthesis. They fed, mated and oviposited in the inflorescences for one day. On the second day, the flies, covered with pollen grains, left the male-phase inflorescences for the next female-phase inflorescences. The immatures of both fly species hatched, developed and pupated within the infructescences without damaging the fruits and developed adults emerged when the mature infructescences dehisced. The flowering events and fly behaviours were well synchronized. In the field pollination experiments, the inflorescences bagged with a fine mesh (insect exclusion) produced almost no fruits, whereas those bagged with a coarse mesh (bee exclusion) produced as many fruits as the open-pollinated controls. These results indicate that the flies are the most efficient and specialised pollinators for their host, A. macrorrhizos. These flies, in return, depend on A. macrorrhizos for food and habitat through most of their life cycle. This study provides a deeper insight into the less recognised, highly intimate pollination mutualism between Araceae plants and Colocasiomyia flies.
Rights: The definitive version is available at www.onlinelibrary.wiley.com
Type: article (author version)
URI: http://hdl.handle.net/2115/52975
Appears in Collections:低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 戸田 正憲

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