The content of MDA in the flower petals of the three treatments
increased gradually with the vase time. SNP treatment could significantly
reduce the concentration of MDA by 35%, 40%, 46% and
50% on day 4, 6, 8 and 10, respectively, compared to the control
(Fig. 3). However, MB-1 markedly increased the concentration of
MDA, suggesting that MB-1 reversed the effect of NO on reducing
the accumulation of MDA during the vase stage in cut carnation
flowers. For LOX activity, the trend of each treatment increasing
gradually with time was observed. It was obvious that SNP treatment
could reduce LOX activity during the whole vase stage in
comparison to the control and MB-1 treatment. For example, it
caused 48.4% and 37.3% reduction (mean of the day from 0 to 10)
compared to the control and MB-1 treated, respectively.