Figure 1.

Accumulation of H₂O₂ (luminol-dependent chemiluminescence) in the medium of rose (A) and French bean (B) cells elicited by cell wall extract from Phytophthora spp. or C. lindemuthianum. Representative plots are shown. For rose cells, the peak H₂O₂ concentrations were 20 ± 8 μm (mean ± se; n = 4) with Phytophthora spp. elicitor and 7 ± 2 μm (n = 4) with C. lindemuthianum elicitor. For French bean cells, the peak H₂O₂ concentrations were 133 ± 39 (n = 5) with C. linedmuthianum elicitor and 16 ± 3 (n = 3) with Phytophthora spp. elicitor.