RG phenotype and plant height determination. (A) Left panel, early development of the pigment accumulation phenotype; right panel a mature leaf. (B) Plant height of RG and wild type for two field seasons (C, D). For each growing season, plant height was determined based on maximal flag termini (n = 25 replicates). Error bars represent the standard error from the mean. Scale bar, 1 m. Significance (P < 0.05) is indicated by a star (★).