Fig. 5

Priming dose dependency in the monocot Oryza sativa. Oxidative burst of Oryza sativa cell suspension cultures pre-treated with different concentrations of ulvan (0.012–0.2 mg/ml) in triplicates, then elicited with 0.08 mg/ml chitosan. During the 120-min measuring period, a first peak with high amplitude was observed sometimes followed by a second peak (a). The first peak maximum (0–30 min) was used to plot a dose-dependency curve (b). The data shown in a are taken from one experiment which is representative of ten independent experiments. The data shown in b are mean values ± SD of these ten experiments with the maximum relative light units (RLUs) reached in each experiment set to 100 %