Extended Data Fig. 5: PIN1 expression in vascular cambium.
From: Gibberellins promote polar auxin transport to regulate stem cell fate decisions in cambium
a, Whole root cross-sections showing pPIN1:PIN1-GFP after 24 h GA4,7 or mock treatment in 14-day old plants in Col-0 and ga1 backgrounds. Numbers represent the frequency of the observed phenotypes (continuous or noncontinuous ring of PIN1 expression) in independent roots. b, Longitudinal sections showing pPIN1:PIN1-GFP following a 24 h GA4,7 or mock treatment in 14-day old plants. c, pPIN1:PIN1-GFP expression in arf7,19 mutant after 24 h GA4,7 or mock treatment in 14-day old plants. Scale bars are 20 µm (a,c) or 10 µm (b). ‘x’ = xylem, ‘c’ = cambium, ‘p’ = phloem. White arrowheads in b point to cells with PIN1 expression. All experiments were repeated three times.
