Figure 4.

Effects of a pulse of red light or far-red light on the volume of protoplasts. While being incubated under background red light the wild-type protoplasts were exposed to a 30-s pulse of red light (7.6 mmol m⁻²) (A) or far-red light (9.0 mmol m⁻²) (B) immediately after time 0. To obtain the required fluence of far-red light, two projector light sources were used. The protoplasts that were in the volume range from 5 × 10³ μm³ to 30 × 10³ μm³ at time 0 were analyzed. The means ± se from 30 to 32 protoplasts are shown. Other details are as described in Figure 3.