The ability of sulfate-reducing bacteria Desulfovibrio desulfuricans Ya-11 i Desulfobacter sp. to use nitrate as electron acceptor

• Main Authors: T. B. Peretyatko, S. P. Gudz
• Format: Article
• Language: English
• Published: Львівський національний університет імені Івана Франка 2011-09-01
• Series: Біологічні студії
• Subjects: sulfate-reducing bacteria; nitrate; electron acceptor
• Online Access: http://publications.lnu.edu.ua/journals/index.php/biology/article/view/375

The ability of Desulfovibrio desulfuricans Ya-11 bacteria to use nitrate as terminal electron acceptor was studied. The level of biomass accumulation in the medium with nitrate changed depending on the initial NO3– concentration. At nitrate concentration 5 mM the bacterial biomass was the same as in the medium with sulfate. The intermediate product of nitrates reduction in D. desulfuricans Ya-11 is nitrite, and the final one – ammonium. High nitrates concentrations in the medium inhibit the process of dissimilatory sulfate reduction. Washed cells of D. desulfuricans Ya-11 fully reduced nitrite of the medium to ammonium. The ability of psychrophyllic sulfate-reducing bacteria Desulfobacter sp. to reduce nitrates at low temperatures is demonstrated.