All nitrogen-fixing root nodule symbioses of angiosperms-legume and actinorhizal symbioses-possess a common ancestor. Molecular processes for the induction of root nodules are modulated by phytohormones. as is the case of the first nodulation-related transcription factor NODULE INCEPTION (NIN). whose expression can be induced by exogenous cytokinin in legumes. https://www.incredibleindiatourtravels.com/