Root hair growth analysis in WT, ahk2ahk3 and ipt1,3,5,7 plants.

Root hair length (A) and number of root hairs (B) in the seedlings were analyzed. The number of root hairs was counted in a 3 mm region from the starting point of the RHDZ. In order to measure root hair length, the longest root hairs (n = 8) per seedling (n>10) were chosen and measured. Different letters indicate significant differences from each other as determined using ANOVA (P<0.05) and significances were corrected post hoc using Tukey’s HSD comparisons.