Fig. 2
From: Nitric oxide contributes to methane-induced osmotic stress tolerance in mung bean
Unlike the responses of CH4 (a), hypoxia (b) failed to alleviate inhibition of seed germination caused by PEG. Mung bean seeds presoaked with solutions containing the indicated concentrations of CH4, nitrogen (N2), or argon (Ar) for 12 h, were then shifted to 20% PEG-6000 for another 48 h. Afterwards, germination rates were determined. Treatment with distilled water was regarded as control (Con). Data are means ± SE of three independent experiments with at least three replicates for each. Bars with different letters denote significant difference at P < 0.05 according to Duncan’s multiple range test