Transcript accumulation from the rpoS gene encoding a stationary-phase sigma factor in Pseudomonas chlororaphis strain O6 is regulated by the polyphosphate kinase gene.

Abstract excerpt

Polyphosphate levels are modulated by the actions of polyphosphate kinase, encoded by ppk, and exopolyphosphatase, encoded by ppx. The genes ppk and ppx are adjacent to each other in the genome of the root colonizer, Pseudomonas chlororaphis O6. A ppk-deficient mutant was more sensitive to oxidative stress than the wild-type and the ppx mutant. Transcripts from ppx increased as cultures matured from mid- to...

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