Figure 4.

Responses of sulfhydryl compounds of maize leaves and roots to E. pisciphila inoculation and Cd stress. A: glutathione, B: glutathione synthetase, C: glutathione reductase; D: γ-glutamyl cysteine synthetase. Data were mean values (n = 3) and error bars represent the standard deviation. Different letters indicate significant differences between treatments.