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Potential pathway of N2O formation in plant cells. NR represents nitrate reductase and Pgb represents phytoglobin (Brudvig et al., 1980; Zhao et al., 1995; Goshima et al., 1999; Gupta and Kaiser, 2010; Guieysse et al., 2013; Plouviez et al., 2017). The pathway is active in presence of NO3 and NO2, and when plants experience hypoxia and anoxia.
