Pollen morphology of Trichosanthes (Cucurbitaceae) |
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| Authors: | Kanchana Pruesapan Raymond Van Der Ham Corresp. Author |
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| Affiliation: | 1. Plant Varieties Protection Division , Department of Agriculture , 50 Phahonyothin Road, Chatuchak, Bangkok, 10900, Thailand;2. Nationaal Herbarium Nederland , Leiden University , P.O. Box 9514, 2300 RA Leiden, The Netherlands |
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| Abstract: | The pollen morphology of 37 species of Trichosanthes was examined, using light microscopy, and scanning and transmission electron microscopy. On the basis of the diverse exine ornamentation it is possible to distinguish five pollen types. With aperture characters, two of them can be subdivided into subtypes. Two types can be characterised with ultrastructural features as well. It appeared that several of the types (alt. subtypes) correspond very well to existing macromorphological groupings. The most deviating type, including only the monotypic section Trichosanthes (T. cucumerina), shows verrucate ornamentation, a thick granular infratectum and a thin, indistinctly delimited nexine. It is similar to that of the Madagascan genus Tricyclandra. |
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