FIGURE 3.

Nitrate reductase (NR) activity and NO₃^- contents in transformed roots. (A) NR activity in control transformed roots (Control LacZ roots transformed with pK7GWG2D-GFP) and in transformed roots overexpressing GSNOR (35S::GSNOR). Transformed roots were cultivated in vitro on Shb10 medium. (B) NO₃^- concentrations in control transformed roots (Control LacZ) and GSNOR-overexpressing roots. Transformed roots were cultivated in vitro for 7 days on Fahraeus medium, and inoculated with A. euteiches. Error bars indicate standard errors (n = 4), and letters or ^∗ indicate significant differences (p < 0.05). Data from one representative experiment out of three independent experiments for both NR activity and NO₃^- contents (n = 12).