Figure 9.

Transcriptional Regulation of KDR, THE1, and FER in Low R:FR Light-Exposed Arabidopsis.

Relative expression of KDR, THE1, FER, IAA19, and ATHB2 in petioles of Col-0, pif7, pif4 pif5, or pif4 pif5 pif7 exposed to control white (R:FR = 1.8) or low R:FR light (R:FR = 0.2) for 4 h (values are relative to reference genes and Col-0 in control treatment, data represent means + se, n = 6 biological replicates) (A) and in hypocotyls of Col-0, pif7, kdr-1, the1-1, and fer-5 exposed to the same treatments for 24 h (values are relative to reference genes and Col-0 in control conditions; data represent means + se, n = 4 biological replicates) (B). Asterisks indicate significant differences between the treatments (Student’s t test, P < 0.05).