Analysis of expression of cytokinin genes by Rhizobium inoculation

Abstract

　　Nodule organogenesis is initiated by dedifferentiation of root cortical cells that reenter cell cycle and form nodule primordial. Cytokinin has a central role in the formation of root nodules following inoculation with rhizobia. We showed that rhizobia induced the expression of IPT, cytokinin synthesis enzyme gene, LHK1, cytokinin receptor gene, in Lotus japonicus. Here we show that cytokinin signaling is required for nodule synthesis.