Figure 1. Auxin response patterns during spontaneous nodule formation and lateral root development in Lotus japonicus. Auxin responses were monitored indirectly by GFP expression patterns during spontaneous nodule formation (A and B) and lateral root development (C and D) in DR5::GFP-NLS stable transgenic plants; these plants have transgenic hairy roots in which CCaMKT265D and mKO2 are constitutively expressed. Transgenic hairy roots were identified by the mKO2 signal (data not shown). Arrows indicate the strongly localized GFP expression, which is observed specifically during lateral root development. Scale bars = 100 μm.