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. 2019 Nov 29;10:2746. doi: 10.3389/fmicb.2019.02746

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Copyright © 2019 Woliy, Degefu and Frostegård.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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N₂O reduction by detached nodules obtained from cowpea plants that had been inoculated with either the N₂O reducing Bradyrhizobium strain AC70c, or with the non-N₂O reducing Bradyrhizobium strain AC29c. The nodules (approximately 18.9 mg dry weight of nodules per vial) were incubated in vials containing He mixed with 5% O₂ and 4–5 μmol N₂O–N (corresponding to about 400–500 ppm N₂O). n = 3; bars indicate standard deviation.