the sum of all ITCs present in plant samples studied
determined according the proposed procedure as NAC-ITC conjugates
were assembled along with the total ITC content determined
as BDTT according Zhang method (Zhang et al., 1996). The results
obtained by both methods gave similar total contents of ITCs in
most of the samples. Only in the case of garden cress, the level of
total ITC content was about twice higher in Zhang method than
in the procedure developed. This could have been caused by some
contaminants reacting with 1,2-benzenedithiol. Nonetheless, the
results of two methods were highly correlated as shown by Pearson
coefficient r = 0.99