Plant Systematics and Evolution

, Volume 302, Issue 9, pp 1239–1252 | Cite as

Floral biology of Schismatoglottis baangongensis (Araceae) in West Sarawak, Borneo

Original Article
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Abstract

The flowering mechanism, visiting insect activities, reproductive system, and floral scent composition of Schismatoglottis baangongensis a Northwest Bornean locally endemic limestone-restricted protogynous mesophyte were investigated. Anthesis started at dawn and lasted ca 29 h. Fruit set for open pollination (93 %) and restricted access pollination (88 %) were high. Colocasiomyia (Diptera, Drosophilidae) and Cycreon (Coleoptera, Hydrophilidae) were the main pollinators. Colocasiomyia flies present in much higher numbers than Cycreon beetles individually carried significantly less pollen load. Chaloenus (Chrysomelidae, Galerucinae) was inadvertent pollinators, and Atheta (Coleoptera, Staphylinidae) passive visitors. Pollen transferal between dissimilar insect genera (Colocasiomyia and Chaloenus) is reported for the first time. Low pollen/ovule ratio of S. baangongensis indicated an efficient pollination mechanism. Ester compound class floral odours, especially the dominant compounds 3-butenoic acid, 3-methyl-, methyl ester, were decisive in attracting pollinators. The spadix appendix of S. baangongensis was the main olfactory body although the spathe was detected to release an additional N-containing compound, an indole. An increase in the total amount of floral scent from the pistillate flower zone during pistillate phase of anthesis from Period I (06:00–08:00 h) to Period II (08:00–10:00 h) was postulated to detain insects in the lower chamber of the inflorescence.

Keywords

Ester compound class Floral volatiles Pollen load Pollination 

Notes

Acknowledgments

This is part of an on-going research funded by the Ministry of Education of Malaysia through Vote Nos. ERGS/01(02)/808/2011(03), FRGS/STWN10(01)985/2013(26) and NRGS/1089/2013-(03). The collaboration and support of the Sarawak Forestry Department are gratefully acknowledged. The most recent fieldwork has been conducted under Research Permit No. NCCD.907.4.4(Jld.12)-51 and Park Permit No. 121/2015. We sincerely thank Masanori J. Toda, Haruo Matsuzawa, Masahito T. Kimura, Alexander G. Kirejtshuk, and Martin Fikáček for identifying the insect specimens. We also thank the two anonymous reviewers for their constructive comments.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

606_2016_1329_MOESM1_ESM.pdf (5.1 mb)
Online Resource 1. Unidentified black (white arrows) and red ants (yellow arrows) are dispersing the fruits (PDF 5222 kb)
606_2016_1329_MOESM2_ESM.pdf (2.4 mb)
Online Resource 2. Pollen view under compound microscope. a Schismatoglottis pollen grains loaded on Cycreon beetles (200X magnification), b–d unidentified pollen grains on Cycreon beetles (200 × magnification), e Schismatoglottis pollen grains (100× magnification), f unidentified pollen grain on Colocasiomyia flies (200X magnification) (PDF 2458 kb)

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© Springer-Verlag Wien 2016

Authors and Affiliations

  1. 1.Department of Plant Science and Environmental Ecology, Faculty of Resource Science and TechnologyUniversiti Malaysia SarawakSamarahanMalaysia
  2. 2.Tunku Abdul Rahman University CollegeSegamatMalaysia
  3. 3.Harvard University HerbariaCambridgeUSA

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