Fig. 5. Activities of the redox enzymes: A) ascorbate peroxidase (APX), B) dehydroascorbate reductase (DHA-R), C) glutathione reductase (G-R), D) ascorbate free radical reductase (AFR-R) on leaves collected during stretched-out leaves (SL), fruit setting (FS), cluster closing (CC) and bunch ripening (BR) phenological phases from symptomless (filled bars) or symptomatic (banded histograms) cv. Italia vines healthy (), with brown wood-streaking () or with brown wood-streaking and white rot (). Data are means of fifteen replicates ± sd. For each parameter, values with the same letters are not significantly different according to Tukey post-hoc test P⩽0.05.
Table 1. Isolation frequency (%) of fungal species obtained from cv Italia vines healthy (H), with brown wood-streaking (BWS) and with BWS and white rot (BWSWR).