Fig. 4From: Improvements in the biochemical responses and Pb and Ni phytoremediation of lavender (Lavandula angustifolia L.) plants through Funneliformis mosseae inoculationMean comparisons for the effect of AMF (a) and Pb and Ni (b) on polyphenol oxidase (PPO) enzyme activity. AMF1 and AMF2 represent no mycorrhiza and application of mycorrhiza, respectively. Dissimilar letters present significant differences based on the LSD test at 5% probabilityBack to article page