3.4 | The Catalase activity in the medium
N, DN, and TN stress significantly down-regulated the activity of S-CAT in the culture medium (p <0.05), while the other groups do not show statistical significance. In addition, synergistic stresses of drought and high-temperature can significantly improve the effect of nitrogen deficiency in down-regulating S-CAT activity (e.g., DTN stress) (p <0.05) (Figure 4-a), but the other groups are not statistically different. It shows that N, DN, and TN stresses are not conducive to removing root peroxide.