caa a22 4500 465790615 CHVBK 20180323112023.0 cr unu---uuuuu 170327e19901201xx s 000 0 eng 10.1007/BF02543866 doi (NATIONALLICENCE)springer-10.1007/BF02543866 Microbial manganese reduction mediated by bacterial strains isolated from aquifer sediments [Elektronische Daten] [J. Di-Ruggiero, A. Gounot] One hundred and five strains isolated from aquifer sediments andEscherichia coli ML30S were tested for their ability to reduce manganese oxides. Eighty-two strains, includingE. coli, reduced manganese. In most cases the bacterial activity decreased the pH and Eh below 6.75 and 350 mV, respectively, enhancing a spontaneous and nonspecific reduction of manganese. However, for 12 strains the reduction was specifically catalyzed by bacteria; the high pH and Eh values would not permit a spontaneous reduction of manganese. Some of the most active strains were identified as genera common in soils and waters, i.e.,Pseudomonas, Bacillus, Corynebacterium, andAcinetobacter. Two strains were studied in detail. One of the strains, identified asPseudomonas fluorescens, required contact between the cells and the manganese oxides for reduction to occur. The reduction was inhibited by 15 mM of sodium azide. The other strain, identified asAcinetobacter johnsonii, catalyzed manganese reduction by an inductive and dialyzable substance which was excreted by the bacteria. The mechanism involved has not been previously demonstrated. Springer-Verlag New York Inc., 1989 Di-Ruggiero J. Microbiologie Physiologique et Appliquee, URA CNRS 697, Universite Lyon I, 69622, Villeurbanne Cedex, France aut Gounot A. Microbiologie Physiologique et Appliquee, URA CNRS 697, Universite Lyon I, 69622, Villeurbanne Cedex, France aut Microbial Ecology Springer-Verlag 20/1(1990-12-01), 53-63 0095-3628 20:1<53 1990 20 248 https://doi.org/10.1007/BF02543866 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02543866 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Di-Ruggiero J. Microbiologie Physiologique et Appliquee, URA CNRS 697, Universite Lyon I, 69622, Villeurbanne Cedex, France aut NATIONALLICENCE 700 1- Gounot A. Microbiologie Physiologique et Appliquee, URA CNRS 697, Universite Lyon I, 69622, Villeurbanne Cedex, France aut NATIONALLICENCE 773 0- Microbial Ecology Springer-Verlag 20/1(1990-12-01), 53-63 0095-3628 20:1<53 1990 20 248 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer