Oxidation of benzaldehydes to benzoic acid derivatives by three Desulfovibrio strains.
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.
Zellner
G
G
Department of Microbiology, University of Regensburg, Federal Republic of Germany.
Kneifel
H
H
Winter
J
J
D001547:Benzaldehydes / Q000378:metabolism*; D001565:Benzoates / Q000378:metabolism; D001673:Biodegradation, Environmental; D003901:Desulfovibrio / Q000378:metabolism*; D007700:Kinetics; D010084:Oxidation-Reduction; D011730:Pyridoxal / Q000378:metabolism; D014641:Vanillic Acid / Q000378:metabolism
D001547:Benzaldehydes; D001565:Benzoates; D011730:Pyridoxal; C024896:4-anisaldehyde; C100058:vanillin; D014641:Vanillic Acid