Sulfide Production from Cysteine by Desulfovibrio desulfuricans.
Two rumen nitrate-reducing isolates of Desulfovibrio desulfuricans were found to hydrolyze cysteine with the production of sulfide and pyruvate. When cultured on agar medium containing yeast extract with nitrate as the primary electron acceptor and ferrous chloride as the indicator, blackening of colonies occurred. The blackening of colonies appeared sooner and was more intense when either cysteine or sulfate was added to the culture medium with nitrate present.
Forsberg
C W
CW
Department of Microbiology, College of Biological Science, University of Guelph, Guelph, Ontario N1G 2W1, Canada.