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KMID : 0364219790220020043
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Korean Journal of Zoology
1979 Volume.22 No. 2 p.43 ~ p.53
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Variations in Gene Transcription during Oogenesis and Early Embryogenesis of a Tubiculous Polychaete
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Lee Yang-Rim
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Abstract
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Variations in expressions of unique genes during oogenesis and early embryogenesis of a tubiculous polychaete were studied by determining the extents of gene transcriptions by sequential DNA-RNA molecular hybridizations. The genes which had been activated in the early stages of oogenesis (previtellogenesis) were gradualy suppressed during the subsequent stages of oogenesis. The transcripts that had been synthesized upto the stages examined were utilized and degraded throughout the vitellogenic stages, and thus, the amount of the transcripts remaining in the fully-grown oocytes was much smaller than that of the previtellogenic oocytes. During the post-fertilization period new genes were transcribed even in the 4-8 cell stage embryos, and the extent of transcription of new genes continues to increase at least upto the trochophore stage.
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KEYWORD
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