Fig. 2. Activities of the enzymes (a) polyphenol oxidase, and (b) peroxidases in shoots and roots of E. grandis plants inoculated with Streptomyces sp. PM9. Distilled water was used
as control. Analyses were carried out at 1, 3, 9 and 15 dpi. Bars represent standard error of the mean. The asterisks indicate difference between treatments (Student T-test P 0.05).