Abstract
Cell cycle progression of Saccharomyces cerevisiae cells was monitored in continuous cultures limited for glucose or nitrogen. The G1 cell cycle phase, before initiation of DNA replication, did not exclusively expand when growth rate decreased. Especially during nitrogen limitation, non-G1 phases expanded almost as much as G1. In addition, cell size remained constant as a function of growth rate. These results contrast with current views that growth requirements are met before initiation of DNA replication, and suggest that distinct nutrient limitations differentially impinge on cell cycle progression.
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Acknowledgments
We are grateful to our colleagues at Texas A&M, especially to J. Miller for flow cytometry, J. Hu and R. Young for continuous discussions, and R. Pathak for comments on the manuscript. We are indebted to W. Fangman for providing valuable advice on the analysis and presentation of experimental data. This work was supported by grants to M.P. from the American Heart Association-Texas Affiliate (0060115Y) and the National Institutes of Health (R01-GM62377).
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Guo, J., Bryan, B.A. & Polymenis, M. Nutrient-specific effects in the coordination of cell growth with cell division in continuous cultures of Saccharomyces cerevisiae. Arch Microbiol 182, 326–330 (2004). https://doi.org/10.1007/s00203-004-0704-2
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DOI: https://doi.org/10.1007/s00203-004-0704-2