Influence of Growth Phase on Radiation Stimulation of Proliferation in Synechococcus lividus in Culture

Previous results from this laboratory have shown that background radiations or exposure to very low doses of chronic γ radiation can stimulate the proliferation of the blue-green algae Synechococcus lividus. To determine the factors controlling the cell response to these low doses, investigations we...

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Bibliographic Details
Published in:Radiation research 1984-09, Vol.99 (3), p.651-658
Main Authors: Conter, A., Dupouy, D., Planel, H.
Format: Article
Language:English
Subjects:
Biological and medical sciences
Biological effects of radiation
Cell culture techniques
Cell cycle
Cell growth
Cultured cells
Cyanobacteria
Fundamental and applied biological sciences. Psychology
Ionizing radiation
Ionizing radiations
Irradiation
Plant cells
Radiation dosage
Steepest descent method
Tissues, organs and organisms biophysics
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Summary:Previous results from this laboratory have shown that background radiations or exposure to very low doses of chronic γ radiation can stimulate the proliferation of the blue-green algae Synechococcus lividus. To determine the factors controlling the cell response to these low doses, investigations were performed with cultures inoculated with cells selected from cultures in exponential, transient, and stationary phases and exposed to chronic irradiation at a dose rate of 20 mGy/year. Transient cells exhibit the greatest growth stimulation; exponential cells are the least radiosensitive. Stationary cells represent an intermediary stage. The modification in cell proliferation occurs only at the beginning of the experiment when inoculated cells have a reduced growth rate.
ISSN:0033-7587
1938-5404
DOI:10.2307/3576338