Letters in Applied Microbiology 1999-11-01

ppGpp accumulation in Pseudomonas aeruginosa and Pseudomonas fluorescens subjected to nutrient limitation and biocide exposure.

D L Greenway, R R England

Index: Lett. Appl. Microbiol. 29(5) , 298-302, (1999)

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Abstract

The effect of a commonly used biocide, 1,2-benzisothiazolin-3-one (BIT) on ppGpp accumulation in the pathogen, Pseudomonas aeruginosa PAO1, and an environmental isolate, Ps. fluorescens, was examined. It is concluded that BIT is able to induce a stringent response in Ps. aeruginosa and Ps. fluorescens, determined by the rapid accumulation of ppGpp following addition of BIT to exponentially-growing cells. Western blot analysis of whole-cell extracts with anti-RelA antibody demonstrated that both species contain a RelA homologue. This is the first report of a RelA-like protein in pseudomonads.

Related Compounds

  • Benzisothiazolone

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