Figure 4.

In situ O₂^•− localization in tomato seedlings cultured for 24 h in water (control) or in phytotoxic cocktails of 100% or 50% fed or unfed traps of pitcher plants. Control seedlings (A), seedlings growing in crude concentrated fluids of unfed traps (B), treated with crude diluted cocktail of unfed traps (C), cultured in crude concentrated fluids of fed traps (D), exposed to crude diluted cocktails of unfed traps (E), growing in heat-treated concentrated fluids of unfed traps (F), heat-treated diluted cocktails of unfed traps (G), heat-treated concentrated fluids of fed traps (H) and heat-treated diluted cocktails of fed traps (I). Bar = 2 mm.