SUNN — Medicago truncatula

Summary

MTR_3G110840, also known as SUNN, MtXIP1, MtCEPR1, or XIP1, encodes a leucine-rich repeat receptor-like kinase (LRR-RLK) with transmembrane receptor serine/threonine kinase activity and peptide hormone receptor binding functions. This barrel medic gene is associated with the regulation of root development, including lateral root initiation, growth, and angle, as well as primary root growth and overall root system architecture. It is linked to nitrate import and response, nitrogen content, phosphorus uptake, and drought tolerance. The gene is also associated with shoot development, floral meristem size, seed size, and yield. Additional associations include appressorium formation, callus formation, meristem development, organogenesis, cytokinin and lignin anabolism, actin depolymerization, and vascular development. Studies of related genes in other species link the family to CEP hormone signaling and pathogen resistance.