Fig. 2.

The activity of Lotus japonicus STY promoters during root and nodule development. Representative images of hairy root segments are shown. Columns from left to right depict the β‐glucuronidase (GUS) activity (in blue) as associated with small lateral root primordia (LRP), emerging or already emerged lateral roots (LR), root apical regions, nodule primordia (NP) and fully mature nodules. All specimens were collected 10–14 d after inoculation with Mesorhizobium loti. For each promoter:GUS construct, 10–15 individual hairy roots were analysed. VB, root vascular bundle; NVB, nodule vascular bundle.