Microbes and Environments
Online ISSN : 1347-4405
Print ISSN : 1342-6311
ISSN-L : 1342-6311
Regular Paper
Characterization of the Aerobic Denitrification in Mesorhizobium sp. Strain NH-14 in Comparison with that in Related Rhizobia
Norihisa OkadaNobuhiko NomuraToshiaki Nakajima-KambeHiroo Uchiyama
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2005 Volume 20 Issue 4 Pages 208-215

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Abstract

A novel aerobic denitrifier, designated strain NH-14, was isolated from soil collected in Tsukuba, Japan. Strain NH-14 could reduce nitrite (NO2-) to nitrous oxide (N2O) under aerobic and anaerobic conditions. The conversion of NO2- to N2O occurred under extremely aerobic conditions (O2 concentration: 4.2 mmol flask-1), and was induced by NO2-, indicating aerobic denitrification. From the biochemical characterization and phylogenic analysis of the complete 16S rRNA gene, strain NH-14 was shown to belong to the genus Mesorhizobium with M. loti and M. amorphae as its closest relatives. The strain was designated Mesorhizobium sp. strain NH-14. It was concluded that Mesorhizobium sp. strain NH-14 is capable of denitrification under both aerobic and anaerobic conditions.

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© Japanese Society of Microbial Ecology / Japanese Society of Soil Microbiology / Taiwan Society of Microbial Ecology
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