Extended Data Fig. 9: Representative roots and nodules from EV and MtFERi hairy roots.

Representative photographs of roots and nodules from EV (a, e) and MtFERi hairy roots (b–d and f-h) at 21 dpi with Sm1021 expressing the LacZ gene. Rhizobia in the nodules (e-h) show blue colour when stained by X-Gal. Scale bars, 1 cm (a–d) and 200 μm (e-h). Experiments in e-h were independently repeated three times with similar results.