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).