The CE Region Is Required for Rhizobium-Induced NIN Expression in the Pericycle.
Tissue-specific ProNIN5kb:GUS and ProNINCE-5kb:GUS expression patterns are shown in the wild type and nin mutants at 2 dpi. Arrowheads indicate GUS expression (light blue) in wild-type ([A] and [B]), in daphne-like ([C] and [D]), and in nin-1 ([E] and [F]) roots. C4 and C5, cortical cell layers 4 and 5; ed, endodermis; ep, epidermis; pc, pericycle. Bars = 50 µm.