Figure 9: A working model of the role of JA in regulating rice spikelet development.
EG1-mediated JA biosynthesis is required for rice spikelet development. Upon perception of the JA signal, OsCOI1b recruits OsJAZ1 to the SCFCOI1 complex for ubiquitination and degradation through the 26S proteasome. As a result, OsMYC2 is released from the OsJAZ1-OsMYC2 complex and proceeds with its function in activating the expression of downstream genes, such as the E-class gene OsMADS1. Proteins investigated in this study are in red. bHLH, basic-helix–loop–helix domain; CR: co-repressors.
