Pollenkitt is lacking inGnetum gnemon (Gnetaceae) |
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Authors: | Michael Hesse |
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Institution: | (1) Institut für Botanik und Botanischer Garten, Universität Wien, Rennweg 14, A-1030 Wien, Austria |
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Abstract: | The anther tapetum of the gymnospermGnetum gnemon produces no lipid osmiophilous droplets as pollenkitt forerunners. Thus—in contrast to entomophilous and anemophilous angiosperms—no pollenkitt is produced at all. From lack of pollenkitt in other gymnosperms, it appears to be restricted to angiosperms. This can be considered as new and additional proof for the hypothesis that the angiosperms are one coherent phylogenetic group, and that the development of pollenkitt in their ancestors was one of the main prerequisites for the adaptive switch to entomophily. |
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Keywords: | Gnetaceae Gnetum gnemon Anther tapetum pollen pollenkitt pollination ecology |
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