Summary
Plant science has entered a transformative era as genome editing enables precise DNA modifications to address global challenges such as climate adaptation and food security. These modifications are primarily driven by the integration of three modular components-DNA-targeting modules, effector modules, and control modules-that can be selectively activated or suppressed. The field has evolved from protein-based systems (e.g., zinc finger nucleases and transcription activator-like effector nucleases) to RNA-guided systems (e.g., CRISPR-Cas) that can control both genetic and epigenetic states. Modular pairing of DNA-targeting and effector domains, with or without inducible control, enables precise transcriptional regulation and chromatin remodeling. The present review examines these three modu
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