Involved in the perception of CLV3 and CLV3-like (CLE) peptides, that acts as a extracellular signals regulating meristems maintenance. Modulates root, shoot and flower apical meristems maintenance and floral organ development regulation, probably via CLAVATA (CLV)-like pathways involving at least CLV3 and CLE19. In complex with CLV2, perceives secreted CLV3-like effector proteins from plant-parasitic cyst nematodes as ligand mimics of the plant CLE signaling pathway. This recognition is required for proper feeding structure (syncytium) development and ultimately successful nematode infection. CLE14 perception by CLV2/CRN complex triggers root meristem differentiation. Required for the sensing of the root CLE peptides (e.g. CLE8, CLE9/CLE10, CLE11, CLE13, CLE14, CLE16, CLE17, CLE18, CLE20, CLE21, CLE25, CLE26, CLE40, CLE41/CLE44 and CLE45), which involves also CLV2 and leads to root growth regulation, mostly in the phloem and protophloem. Promotes the accumulation of BAM3, especially at later stages of protophloem development.