Marine Denitrifying Bacteria from South India

Summary: Thirty-two isolates from a number obtained from sea water off the South Indian coast, from marine sand and from molluscs, proved to be denitrifiers. The reactions of 20 of these strains on different media show that they fall into five groups; all are considered to be species of Pseudomonas, and two of the groups to be new species. It is possible that the observed fluctuations in the nitrate content of sea water are in part due to the activities of denitrifying bacteria.