Cytological Events during Zygote Formation of the Fern Ceratopteris thalictroides |
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Authors: | Jian-Guo Cao Quan-Xi Wang Nai-Ying Yang Wen-Mei Bao College of Life Environment Science Shanghai Normal University Shanghai China |
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Institution: | Jian-Guo Cao,Quan-Xi Wang,Nai-Ying Yang , Wen-Mei Bao College of Life , Environment Science,Shanghai Normal University,Shanghai 200234,China |
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Abstract: | The cytological events, including nuclear fusion, digestion of male organelles and rebuilding of the plasmalemma and cell wall, during zygote formation of the fern Ceratopteris thalictroides (L.) Brongn. are described based on the observations of transmission electron microscopy. When the spermatozoid enters the egg and contacts the cytoplasm, the male chromatin relaxes continually. The microtubular ribbon (MTr) is separated from the male nucleus and then an envelope reappears around the male nucleus. Durin... |
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