2011•Applied and Environmental MicrobiologyOpen access

Nitrate-Dependent N 2 O Emission from Intact Soybean Nodules via Denitrification by Bradyrhizobium japonicum Bacteroids

Junta Hirayama, Shima Eda, Hisayuki Mitsui, Kiwamu Minamisawa

Abstract

In the presence of nitrate, N₂O emission increased markedly from soybean roots inoculated with nosZ mutant of Bradyrhizobium japonicum, but not from soybean roots inoculated with a napA nosZ double mutant, indicating that B. japonicum bacteroids in soybean nodules are able to convert the exogenously supplied nitrate into N₂O via a denitrification pathway.

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Key concepts: Bradyrhizobium japonicum, Denitrification, Nitrate, Bradyrhizobium, Rhizobiaceae, Nitrogen fixation, Chemistry, Environmental chemistry