1887

Abstract

SUMMARY

Glycerol-accelerated death of starved, glycerol-limited populations of occurred if the medium used to assess viability contained glycerol, but not if it contained pyruvate or glucose. Pyruvate-accelerated death of glycerol-limited populations occurred with all three types of recovery medium. Lactose-limited populations showed lactose-accelerated death, with comparable substrate and recovery medium specificity, without change in -galactosidase content. Inducers of the operon, whether gratuitous or not, also accelerated death of lactose-limited populations. Cyclic AMP (0·08 m) or its butyryl derivative (0·02 m), but not a variety of other nucleotides, prevented substrate-accelerated death but did not abolish the prolonged lags characteristic of survivors of this stress; these findings further support the view that substrate-accelerated death is related to intracellular repression-derepression processes.

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/content/journal/micro/10.1099/00221287-70-1-115
1972-04-01
2022-01-20
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