Figure 5.

A, Chlorophyll levels are reduced by fhy3-1 in seedlings exposed to short periods of continuous FR but not in seedlings exposed to hourly FR pulses. Three-day-old seedlings were exposed to 4-h-long-wavelength FR and transferred to white light for 5 h before harvest. B, Blocking of greening phenotype in the fhy3-1 mutant. The seedlings were grown for 3 d in darkness or under pulsed or continuous long-wavelength FR and then transferred to continuous white light for 1 d. Data are means and se of eight to nine replicate samples. Black bars, Darkness; gray bars, hourly FR; white bars, continuous FR.