The genes analyzed include PvFNSII involved in the synthesis of flavones, the chemical signal of the plant sensed by compatible rhizobia, and genes involved in the infection thread initiation and progression (PvFLOT2, PvENOD40, and PvENOD93) that act downstream of the TF NSP2 and NIN (Roy et al., 2020). Here, NIN is linked to infection.