The time and duration of the premeiotic inteprhase in microsporocytes ofTrillium kamtschaticum |
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Authors: | Masaharu Yoshioka Masuo Maeda Michio Ito |
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Institution: | (1) Department of Biology, Faculty of Science, Nagoya University, 464 Nagoya;(2) Biological Laboratory, Faculty of Education, Fukui University, 910 Fukui |
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Abstract: | The time and duration of each phase of the premeiotic interphase were determined in microsporocytes of two clones (S and K
clones) ofTrillium kamtschaticum. After collectionTrillium plants were stored at 3 C or 7 C prior to completion of premeiotic mitosis in archesporial cells. For autoradiography, cells
were explanted in the presence of3H-thymidine to identify the interval of the premeiotic DNA synthesis. Approximate durations of the G1, S and G2 phases for the K clone stored at 3 C were estimated to be 12, 12 and 14 days, respectively. The interval of premeiotic development
was markedly different between clones. A high degree of synchrony in meiotic development, which is usually observed within
anthers up to late meiotic prophase, was confirmed at the S phase, suggesting that synchrony is established during the G1 interval. |
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Keywords: | Cell cycle Meiosis Microsporocyte Premeiosis Trillium |
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