Oxidation of benzaldehydes to benzoic acid derivatives by three Desulfovibrio strains

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Abstract

Desulfovibrio vulgaris Marburg, 'Desulfovibrio simplex' XVI, and Desulfovibrio sp. strain MP47 used benzaldehydes such as vanillin, 3,4,5-trimethoxybenzaldehyde, protocatechualdehyde, syringaldehyde, p-anisaldehyde, p-hydroxybenzaldehyde, and 2-methoxybenzaldehyde as electron donors for sulfate reduction and carbon dioxide and/or components of yeast extract as carbon sources for cell synthesis. The aldehydes were oxidized to their corresponding benzoic acids. The three sulfate reducers oxidized up to 7 mM vanillin and up to 4 mM p-anisaldehyde. Higher concentrations of vanillin or p-anisaldehyde were toxic. In addition, pyridoxal hydrochloride and o-vanillin served as electron donors for sulfate reduction. Salicylaldehyde, pyridine-2-aldehyde, pyridine-4-aldehyde, and 4-hydroxy-3-methoxybenzylalcohol were not oxidized. No molecular hydrogen was detected in the gas phase. The oxidized aldehydes were not further degraded.

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Zellner, G., Kneifel, H., & Winter, J. (1990). Oxidation of benzaldehydes to benzoic acid derivatives by three Desulfovibrio strains. Applied and Environmental Microbiology, 56(7), 2228–2233. https://doi.org/10.1128/aem.56.7.2228-2233.1990

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