3.2 Xylem sap
As summarized in table 2, during the bleeding period, HV discharged the lower quantity of BXS.
The dynamic viscosity coefficient of the BXS collected from HV was lower than the values of the samples spurted from diseased vines. Among diseased vines, the presence of white rot increases dynamic viscosity (Table 2).
The highest concentration of T-ASC was recorded in sap bleed from HV. The lowest was in BWSV (Table 2). BXS collected from HV had the lowest quantity of T-GLU, whereas the highest was in BWSWRV (Table 2).
The auxin-like activity was detected in all the tested BXS samples. Sap collected from diseased vines showed auxin activity 2-3 times greater than HV (Table 2). The lowest kinetin activity was recorded on BXS bleed from HV (Table 2).