Fig. 8

Relative amount of (a) total phenolic content, and enzyme activities of (b) phenylalanine deaminase, (c) peroxidase, (d) polyphenol oxidase, and (e) superoxide dismutase in the leaves of grapevine plantlets inoculated with A. tumefaciens Gh1 pre-treated with the suspension of endophytic bacteria, compared with plantlets inoculated with A. tumefaciens Gh1 alone (Ctrl +) and non-treated plantlets (Ctrl-)