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. 2018 Oct 1;178(3):1370–1389. doi: 10.1104/pp.18.00126

Figure 3.

Figure 3.

PABA activity intersects with the ethylene pathway. A, Top, 6-d-old Arabidopsis seedlings were grown on solid Arabidopsis growth medium (Control) or supplemented with 200 µm PABA or 0.5 µm ACC and rotated by 135° for 4 h. The white arrow indicates the gravity vector (g). Bars = 1 cm. Bottom, Quantification of root gravitropism of plants presented in A. Gravistimulated roots were assigned to one of the 12 30° sectors on the gravitropism diagram. The length of each bar represents the percentage of seedlings showing the respective direction of root growth. Numbers inside the circles indicate the number of plants for each genotype. B, Root phenotypes of 7-d-old seedlings of Col-0 and pin2 mutant on control, 200 µm PABA, and 0.5 µm ACC treatment. The white arrow indicates the direction of the gravity vector (g). Bars = 0.5 cm. C, Quantification of root gravitropism of wild-type and pin2 seedlings (with roots pulled straight) gravistimulated at 135° for 12 h.