Figure 4.

Effects of Rop2 Transgene Expression on Tip Growth.

(A) Tip of growing wild-type root hair.

(B) and (C) Tips of growing Rop2 OX hairs showing different degrees of branching.

(D) to (G) Root hair density and length on wild-type (D), Rop2 OX (E), DN-rop2 (F), and CA-rop2 (G) roots.

(H) DN-rop2 expression led to an increased number of hairs that stopped growing before reaching 40 μm in length (i.e., they did not make the transition to tip growth).

(I) Wavy DN-rop2 hair.

(J) CA-rop2 expression led to depolarization of hairs grown in contact with the air.

Bars in (A) to (C), (H), and (I) = 100 μm; bars in (D) to (G) = 500 μm; bar in (J) = 200 μm.