Nitrate-dependent N 2O emission from intact soybean nodules via denitrification by Bradyrhizobium japonicum bacteroids

Abstract

In the presence of nitrate, N 2O 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 N 2O via a denitrification pathway. © 2011, American Society for Microbiology.