RNA synthesis required for DNA replication in vicia seed embryos

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概要

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• The synthesis of DNA and RNA during germination of Vicia seeds was examined. Incorporation of ^3H-thymidine into DNA reached a maximum at about 32 hr after the beginning of imbibition, and RNA synthesis was shown to precede DNA replication. Sedimentation analyses of ^3H-uridine-labeled RNAs indicated that the embryos synthesize all types of rRNA, heterodisperse RNA and 4-5S RNA before and also during the phase of DNA replication. Actinomycin-treatments at lower concentrations (50 or 100 μg/ml) resulted in the specific inhibition of rRNA synthesis. Such inhibition did not lead to a large reduction in ^3H-thymidine incorporation during the replication phase. However, DNA synthesis was drastically inhibited by a higher level (200 μg/ml) of actinomycin D. The results strongly suggest the involvement of synthesis of heterodisperse RNA in DNA replication.

• 日本植物生理学会の論文

著者

• Takaiwa Fumio

  Department of Biotechnology, National Institute of Agrobiological Resources

• Takaiwa Fumio

  Department Of Botany Faculty Of Science Hokkaido University

• Tanifuji Shigeyuki

  Department of Botany, Faculty of Science, Hokkaido University

• Tanifuji Shigeyuki

  Department Of Botany Faculty Of Science Hokkaido University

• Tanifuji Shigeyuki

  Department Of Botany Faculty Of Science Hokhaido University

• Fukuei Keisuke

  Department of General Education, Kunitachi Music College

• Takahashi Noribumi

  Department of Botany, Faculty of Science, Hokkaido University

• Sakamaki Tadashi

  Department of Botany, Faculty of Science, Hokkaido University

• Fukuei Keisuke

  Department Of Botany Faculty Of Science Hokkaido University

• Sakamaki Tadashi

  Department Of Botany Faculty Of Science Hokkaido University

• Takahashi Nobunori

  Department Of Botany Faculty Of Science Hokkaido University

• Takaiwa Fumio

  Department Of Biotechnoiogy Central Research Institute Of Electric Power Industry

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