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. 1977 Dec;34(6):626–629. doi: 10.1128/aem.34.6.626-629.1977

Effect of growth substrate on thermal death of thermophilic bacteria.

G J Merkel, J J Perry
PMCID: PMC242721  PMID: 596868

Abstract

The heat sensitivity of gram-negative, hydrocarbon-utilizing thermophilic bacteria was altered by a change in growth substrate. Thermophilic strains CC-6, BI-1, and LEH-1, grown with acetate or n-heptadecane as the carbon source, had a higher survival rate when incubated 5 degrees C above their maximum growth temperature than cells of the same organism after growth on glucose or glycerol. There was a correlation between the growth substrated, heat resistance, and the ratios of cellular n-hexadecanoic acid/branched hexadecanoic acid and n-heptadecanoic acid/branched heptadecanoic acid. The bacterial cells that were more heat resistant had ratios of straight-chain/branched-chain fatty acids above 1.0, whereas the heat-sensitive cells had ratios below 0.6.

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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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