Formation of sperm cells inGalium mollugo (Rubiaceae),Trichodiadema setuliferum (Aizoaceae), andAvena sativa (Poaceae) |
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| Authors: | Martina Weber |
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| Affiliation: | (1) Institut für Botanik und Botanischer Garten, Universität Wien, Rennweg 14, A-1030 Wien, Austria |
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| Abstract: | The formation of sperm cells has been examined ultrastructurally in the tricellular pollen grains ofGalium mollugo L. (Rubiaceae).Trichodiadema setuliferumSchwantes (Aizoaceae), andAvena sativa L. (Poaceae). After detachement from the intine the generative cell of all three species lies free within the vegetative cytoplasm. The two sperm cells are built inTrichodiadema andAvena by a single separating wall, while inGalium mollugo two independent walls are formed. However, both mechanisms separate the two male gametes completely. |
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| Keywords: | Rubiaceae:Galium mollugo Aizoaceae:Trichodiadema setuliferum Poaceae:Avena sativa Generative cell sperm cell sperm cell formation tricellular pollen grains |
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