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Fig. 4 Differences in physiological variables between seedlings of control (CK) and seedlings inoculated with Tulasnella hy-111. A: POD activity. B: SOD activity. C: CAT activity. D: Soluble protein content. E: Soluble sugar content. F: Proline content. *P<0.05, **0.001≤P<0.01, ***0.000 1≤P<0.001, **** P<0.000 1.