Abstract
The plant meristem is maintained by intercellular signalling through dodeca-CLE peptides. The Arabidopsis suppressor of LLP1 2 (sol2) mutant, which suppress the short root phenotype caused by CLAVATA3/ESR-related(CLE)19-overexpression, showed a resistance to CLAVATA3 (CLV3) peptide. We investigated 26 synthetic CLE peptide function in the clv1-4, clv1-6, clv1-13, clv2-1, and sol2 mutants, and suggest that SOL2 and CLV2 function together in CLE signaling pathway in RAM. Positional cloning of the sol2 mutant identified a mutation in a receptor-like kinase protein (At5g13290). Yeast two hybrid screening with kinase domain of SOL2 revealed that SOL2 can interact with kinase, phosphatase and transcription factors. Taken together, we suggest diverse SOL2 functions, including the regulation of shoot and root apical meristem homeostasis through the CLE signaling pathway.
