Using single cell cultivation system for on-chip monitoring of the interdivision timer in Chlamydomonas reinhardtii cell cycle

Kazunori Matsumura, Toshiki Yagi, Akihiro Hattori, Mikhail Soloviev, Kenji Yasuda*

*この研究の対応する著者

研究成果: Article査読

23 被引用数 (Scopus)

抄録

Regulation of cell cycle progression in changing environments is vital for cell survival and maintenance, and different regulation mechanisms based on cell size and cell cycle time have been proposed. To determine the mechanism of cell cycle regulation in the unicellular green algae Chlamydomonas reinhardtii, we developed an on-chip single-cell cultivation system that allows for the strict control of the extracellular environment. We divided the Chlamydomonas cell cycle into interdivision and division phases on the basis of changes in cell size and found that, regardless of the amount of photosynthetically active radiation (PAR) and the extent of illumination, the length of the interdivision phase was inversely proportional to the rate of increase of cell volume. Their product remains constant indicating the existence of an 'interdivision timer'. The length of the division phase, in contrast, remained nearly constant. Cells cultivated under light-dark-light conditions did not divide unless they had grown to twice their initial volume during the first light period. This indicates the existence of a 'commitment sizer'. The ratio of the cell volume at the beginning of the division phase to the initial cell volume determined the number of daughter cells, indicating the existence of a 'mitotic sizer'.

本文言語English
論文番号23
ジャーナルJournal of Nanobiotechnology
8
DOI
出版ステータスPublished - 2010 9 25
外部発表はい

ASJC Scopus subject areas

  • バイオエンジニアリング
  • 医学(その他)
  • 分子医療
  • 生体医工学
  • 応用微生物学とバイオテクノロジー
  • 薬科学

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