Figure 3: Light inhibits soybean seed germination.

(a,b) Healthy and uniform soybean seeds (cultivar ND12, yellow soybean) were incubated on two layers of filter paper in Petri dishes at 25 °C under white light (2430 lx) and dark conditions (CK), respectively. The germination rates under dark conditions were recorded using a safe green light. Quantitative analysis of germination rates is shown in the right panels. The representative images (18 h after sowing) are shown (left panels). Fresh weight (c) and radicle length (d) of germinated seeds were measured. The average length and fresh weight of four repeats are shown. **Difference is significant at the 0.01 level. Bar = 10 mm.