The AsA concentration at the end of growing season
(Table 4) was significantly higher in CFA leaves than in
NFA + O3 fumigated leaves (15%). AsA levels in CFA was
not significantly higher than in NFA.
Antioxidant enzymes APX, GR and SOD showed activities
that are summarized in Table 4.APX and SOD increased
their activity in response to NFA + O3 treatment (16% and
67%, respectively). SOD activity also increased in NFAtreated
plants. GR activity decreased about 12% after
NFA + O3 treatment.