Fig. 4From: Bio-refining of perennial ryegrass (Lolium perenne): evaluation of aqueous extracts for plant defence elicitor activity using French bean cell suspension culturesReduced elicitor activity in screw-pressed Spelga juice treated with anion exchange resin (black columns), cation exchange resin (grey columns) or activated carbon (hatched columns) compared to control untreated juice (unfilled columns). Bars indicate ± the LSD at P ≤ 0.05 (residual d.f. = 48)Back to article page