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Science 13 December 1968:
Vol. 162. no. 3859, pp. 1289 - 1290
DOI: 10.1126/science.162.3859.1289
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Articles

Dictyostelium discoideum: A Gamma-Ray Resistant Organism

R. A. Deering 1

1 Biophysics Department, Pennsylvania State University, University Park 16802

The vegetative cells of the slime mold Dictyostelium discoideum are extremely resistant to cobalt-60 gamma rays. The survival curve has a shoulder at low doses and a 10 percent survival dose of 300 kilorads in air. Dose fractionation experiments indicate that repair of sublethal damage is an important factor in this resistance.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)