Fig. 1.

Time-dependent changes of CH₄ production. Mung bean seeds presoaked with solution containing 1.3 mM CH₄ for 12 h, were then shifted to 20% PEG-6000 for another 48 h. The endogenous CH₄ production in germinating seeds was then detected by gas chromatography (GC). Treatment with distilled water was regarded as control (Con). Data are means ± SE of three independent experiments with three replicates for each. Bars with different letters denote significant difference at P < 0.05 according to Duncan’s multiple range test