1887

Abstract

SUMMARY: Six mutants of 168 that are temperature-sensitive in spore outgrowth were isolated. The outgrowth process proceeds normally at 35 °C, but at the non-permissive temperature (47 °C) it is arrested at a specific stage characteristic for each mutant strain. The mutants are not altered in vegetative growth whether at 35 °C or at 47 °C. They were characterized for their ability to synthesize RNA, proteins and DNA during outgrowth. A mutant defective in spore germination was also isolated; less than 5% of its spores can germinate at any of the temperatures tested. The mutations were mapped by means of transduction and transformation. The isolation of a number of outgrowth mutants which map at different loci and which affect outgrowth at different times is discussed in relation to the regulation of this process.

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1979-02-01
2021-08-02
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