Fig. 1. Time course of stem length increment in three sunflower cultivars that received unfiltered sunlight red light/far-red light (R/FR) ratios (1.1, control) or low R/FR ratios (0.3) at the stem. First sowing date was 25 Oct. 1998. Second sowing date was 6 Jan. 1999. Bars indicate standard errors.

Return to article