Fig. 6.

Reduced NO detection with the inclusion of non-infected plant tissue (A) and soil (B). (A) Nitric oxide production from tobacco leaves inoculated to a percentage level of the leaf with Pseudomonas syringae bacteria 6 h after the challenge. As can be seen, the actual NO production levels are considerably lower, as could be expected from the damage percentage of the leaf tissue, most probably due to oxidation of NO produced by infected tissue by the surrounding uninfected tissue. (B) Nitric oxide production from a 5-week-old Arabidopsis plant grown in soil, from the same soil after cutting the plant and reapplication of the cut rosette to the soil surface (Mur et al. 2011).