Fig. 2From: Bio-refining of perennial ryegrass (Lolium perenne): evaluation of aqueous extracts for plant defence elicitor activity using French bean cell suspension culturesThe effects of chitosan concentration on the elicitation of bean cell suspension cultures. Tissue browning score (a), fresh weight (b) and culture medium absorbance at 280 nm (c) were assessed 24 h after treatment with chitosan. Bars indicate ± the LSD at P ≤ 0.05 (residual d.f. = 60)Back to article page