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. 2010 Dec 29;71(2):292–297. doi: 10.1016/j.envexpbot.2010.12.015

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Fig. 2 — Effects of different potassium supplies on H₂O₂ contents and antioxidative enzyme activities in H. cordata. (a) H₂O₂, (b) CAT, (c) POD and (d) SOD. Values are means ± SE (n = 3). Vertical line on top of the bars means SE. Bars carrying different letters are significantly different at P < 0.05.