Figure 8.

The arf2 Mutant and HAK5-Overexpressing Lines Show Longer Root Hairs under Low-K⁺ Conditions.

(A) Root hair phenotype of various plants as indicated. Seedlings were germinated and grown on low-K⁺ medium or K⁺-sufficient medium for 4 d. Bars = 1 mm.

(B) Diagram of root hairs in primary roots. Root hair length was measured in the upper region (2 mm) of the root hair differentiation zone (RHDZ).

(C) Root hair length of various plants tested in (A). Data are means ± se (n = 120 from eight individual plants for each bar). Student’s t test (**P < 0.01) was used to analyze statistical significance, and “#” represents control.