Figure 10.

ARF16a-GUS Promoter Fusion Expression during Rhizobial Infection and in Nodules and Lateral Roots.

A. rhizogenes-induced hairy roots were used to analyze ProARF16a:GUS expression: (A) to (D) during rhizobial infection ([A] and [B], 3 weeks after inoculation; [C] and [D], 3 and 5 dpi); (E) in a young nodule; (F) in an elongated nodule; (G) in a mature nodule (median longitudinal section); (H) in a lateral root tip; and (I) and in a lateral root primordium. The blue color ([A] to [I]) indicates staining of GUS activity, and the magenta color (G) indicates LacZ activity of S. meliloti carrying pXLGD4. Bars = 100 μm.