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. 1988 Nov;54(11):2619–2624. doi: 10.1128/aem.54.11.2619-2624.1988

Sensitivity of ruminal microorganisms to pentachlorophenol.

M T Yokoyama 1, K A Johnson 1, J Gierzak 1
PMCID: PMC204345  PMID: 3214151

Abstract

Pentachlorophenol (PCP) is used extensively as a biocidal agent, and there is considerable concern about the adverse effects of this compound in biological ecosystems. The effects of PCP on the growth and fermentative activity of cultures of mixed ruminal microorganisms and the sensitivity of 14 ruminal bacterial species to PCP in pure culture were examined in this study. Increasing concentrations of PCP (9.4 to 375.4 microM) depressed growth and propionate concentrations in cultures of mixed ruminal microorganisms. Wide differences in the sensitivities of ruminal bacterial strains to various concentrations of PCP were observed. Cellulolytic strains were highly sensitive to PCP, while amylolytic, sugar-utilizing, and intermediate acid-utilizing strains were more resistant. Growth of major succinate-producing strains was depressed by PCP. Strains which depend on substrate level phosphorylation appeared to be more resistant. The data suggest that the adverse effects of PCP on ruminal microorganisms may be the result of its role as both an uncoupler of electron transport and a protonophore.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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