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. 2022 Nov 28;13:1049954. doi: 10.3389/fpls.2022.1049954

Figure 2.

Figure 2

Contents of O2 -, H2O2, MDA, antioxidant enzyme activities (A) and contents of ammonium nitrogen, nitrate nitrogen, nitrogen metabolizing enzyme activity (B) in the four treatments. Data are presented as the mean ± SEM for six biological replicate samples and each sample included 3 plants. Bars labeled with different letters for significant difference between treatments.