Suppressive effect of light on the formation of DNA and on the increase of deoxythymidine monophosphate kinase activity in Chlorella protothecoides

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概要

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• As previously demonstrated, chlorophyll-less cells of Chlorella protothecoides are obtained when the alga is grown in a medium rich in glucose and poor in a nitrogen source (urea). When these cells are incubated in a medium enriched with a nitrogen source, there occurs, besides greening of algal cells, an active formation of DNA followed by synchronous cellular division. The DNA formation and cellular division are markedly suppressed by light of a comparatively low intensity. Blue light is most effective and red light least effective in suppression. The effect of light on the level of dTMP kinase activity in the algal cells was investigated in relation to the photoinhibition of DNA formation. It was found that light suppresses the increase of dTMP kinase activity in the algal cells which starts in advance of active DNA synthesis, and that blue light has a stronger suppressive effect than red light.

• 日本植物生理学会の論文

著者

• Sokawa Yoshihiro

  Institute Of Applied Microbiology University Of Tokyo And Tokugawa Institute For Biological Research

• Hase Eiji

  Institute Applied Microbiology University Of Tokyo:tokugawa Institute For Biological Research

• HASE EIJI

  Institute of Applied Microbiology, University of Tokyo, and Tokugawa Institute for Biological Research

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