Receptor kinases mediate many signaling events in the animal as well as plants. Among them, CLAVATA1 in Arabidopsis is one of the well-known LRR RK in plants, which functions in CLV pathway and regulate stem cell pool in SAM. AtCLV1 encodes a leucine-rich repeat receptor-like kinase. CLV loss of function mutants accumulates stem cell in the central zone and exhibits shoot fasciation, enlarged shoot and floral meristem and increased floral organ numbers. In soybean, a model plant in legume, GmCLV1A, and GmNARK are the most closely related to AtCLV1. GmNARK is involved in root nodulation through a regulatory network called autoregulation of nodulation specific to legumes. Loss of function in the GmNARK leads to super- or hyper-nodulation. GmCLV1A was investigated in this study for the first time. A recessive loss of function allele was isolated for GmCLV1A through TILLING. After that, through several experiments, it has been shown that the mutant had a plastic and temperature-sensitive phenotype displaying abnormal leaf development, bifurcated pods, and increased basal branching but normal nodulation. Taken together, our findings indicate that GmCLV1A acts on shoot architecture.