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Vertebrate pollination of the endemic Trochetia granulata (Malvaceae) on Réunion

Abstract : The pollination ecology and breeding system of Trochetia granulata (Malvaceae), an endemic tree species from Réunion were studied. In 2010–2011, compatibility studies were conducted on a total of 154 flowers from 35 different individuals using three different hand pollination treatments: (a) autofertility, (b) self-pollination and (c) cross-pollination. During the period, we also studied the pollination ecology of T. granulata. During 48 h of video recordings, we tracked flower visits to T. granulata in six different sites and studied the behaviour of the visitors. The results from the hand-cross experiments show that T. granulata is self-compatible (60.8% fruit set) but cannot produce fruit (5.4% fruit set) without the visit of a pollen vector. During surveys, four different visitors were reported: the introduced honey bee (Apis mellifera), two endemic species of white-eye (Zosterops borbonicus borbonicus and Z. olivaceus) and the endemic Réunion day gecko (Phelsuma borbonica). This study documented a new case of vertebrate-pollination by lizard and birds in an insular context. These interactions might be linked to several uncommon floral traits of Trochetia species.
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https://hal.univ-reunion.fr/hal-01199316
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Submitted on : Tuesday, September 15, 2015 - 12:01:12 PM
Last modification on : Tuesday, March 17, 2020 - 3:40:22 AM

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Timothée Le Péchon, Mickaël Sanchez, Laurence Humeau, Luc D.B. Gigord, Li-Bing Zhang. Vertebrate pollination of the endemic Trochetia granulata (Malvaceae) on Réunion. Journal of Tropical Ecology, Cambridge University Press (CUP), 2013, FirstView (4), pp.353--356. ⟨10.1017/S0266467413000278⟩. ⟨hal-01199316⟩

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