Stimulation of H2O2 production in L. stagnalis haemocytes by laminarin. Stimulation of H2O2 production in L. stagnalis haemocytes by laminarin. The generation of H2O2 was investigated in (A) haemocytes stimulated with different doses of laminarin (1-10 mg ml-1) for 30 min, and (B) in haemocytes stimulated with laminarin (10 mg ml-1) over 30 min. Values are relative fluorescence (mean ± s.d.) of two independent experiments, each done in triplicate. *P≤0.05, **P≤0.01 and ***P≤0.001 when compared to control (unstimulated) values. Audrey H. Lacchini et al. J Exp Biol 2006;209:4829-4840 © The Company of Biologists Limited 2006