Receptor-like kinases (RLKs) can participate in multiple signaling pathways and are considered one of the most critical components of the early events of intercellular signalling. As an RLK, the ERECTA family (ERf), which comprises ERECTA (ER), ERECTA-Like1 (ERL1), and ERECTA-Like2 (ERL2) in tomato, regulates multiple signalling pathways in plant growth and development. The downstream targeted protein were screened out through phosphorproteomics