Abstract
IN a previous paper1 it was shown that dwarf-growth mutants in Bacterium prodigiosum (Serratia marcescens) can be produced by ultra-violet radiation apparently in a one-hit mechanism, and that the most active wave-lengths lie below 3,000 A. If the killing of bacteria by a light-quantum hit is a process happening in the genetical system, one might suppose that also the energy of quanta of visible light may be capable of producing vital genetic variants, for Liechti et al.2 had observed the killing of vitalstained bacteria by such longer wave-lengths.
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References
Kaplan, R. W., Z. Nat. Forsch., 3, b, 29 (1948).
Liechti, Feistmann and Gugenheim, Strahlenther., 64 (2), 353 (1939).
Demerec and Latarjet, Cold Spring Harbor Symposium, 11, 38 (1947).
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KAPLAN, R. Mutations by Photodynamic Action in Bacterium prodigiosum. Nature 163, 573–574 (1949). https://doi.org/10.1038/163573b0
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DOI: https://doi.org/10.1038/163573b0
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