Spatial Differences in Stoichiometry of EGR Phosphatase and Microtubule-Associated Stress Protein 1 Control Root Meristem Activity during Drought Stress

During drought stress, poorly understood signaling mechanisms restrict meristem cell division. This study demonstrated that the Clade E Growth-Regulating 2 (EGR2) protein phosphatases and their downstream signaling target Microtubule Associated Stress Protein 1 (MASP1) control root meristem size and regulate growth during drought stress. Using EGR-MASP1 signaling to control meristem size may be a way to improve plant growth and productivity in stressful environments.