Pollen morphology of Combretaceae from Thailand and its taxonomic significance

Authors

  • Puntiwa Krachai Present address: Program of Biology, Department of Science, Faculty of Science and Technology, Loei Rajabhat University, Loei 42000, Thailand Applied Taxonomic Research Center, Department of Biology, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
  • Pimwadee Pornpongrungrueng Applied Taxonomic Research Center, Department of Biology, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand

Keywords:

Combretaceae, Pollen, Taxonomy, Thailand

Abstract

The pollen morphology of 30 taxa from six genera of Thai Combretaceae, including one species each of Anogeissus and Calycopteris, two species each of Lumnitzera and Quisqualis, 11 species of Combretum and 13 species of Terminalia (including one introduced species), was investigated to determine its taxonomic signifi cance. The pollen samples were acetolyzed and investigated under light and scanning electron microscopy. Pollen morphology of Thai Combretaceae was described, compared and discussed along with its taxonomic implications. The taxonomic signifi cance of pollen morphological characters for Thai Combretaceae is limited. The pollen grains were found to be monads, radially symmetrical, isopolar, small- to medium-sized, heterocolpate (tricolporate alternating with subsidiary colpi). The taxa studied can be divided into two groups and nine subgroups according to the fusion of subsidiary colpi at the polar area and the exine sculpturing patterns. However, this grouping is not congruent with the taxonomic classification of the family based on morphological as well as molecular data.

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Author Biographies

Puntiwa Krachai, Present address: Program of Biology, Department of Science, Faculty of Science and Technology, Loei Rajabhat University, Loei 42000, Thailand Applied Taxonomic Research Center, Department of Biology, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand

Program of Biology, Department of Science, Faculty of Science and Technology, Loei Rajabhat University, Loei 42000, Thailand

Pimwadee Pornpongrungrueng, Applied Taxonomic Research Center, Department of Biology, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand

Applied Taxonomic Research Center, Department of Biology, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand

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Published

2015-12-25

How to Cite

Krachai, P., & Pornpongrungrueng, P. (2015). Pollen morphology of Combretaceae from Thailand and its taxonomic significance. Thai Forest Bulletin (Botany), (43), 4–14. Retrieved from https://li01.tci-thaijo.org/index.php/ThaiForestBulletin/article/view/44177

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