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Background：NPR1 (Non-expressor of Pathogenesis-Related Genes 1) is a key gene in the plant defense mechanism, primarily responsible for regulating Systemic Acquired Resistance (SAR), a global defense strategy activated in response to pathogen infection. In this process, NPR1 serves as a central regulatory factor, sensing and transmitting defense signals to activate downstream defense genes. Additionally, NPR1 plays a broad role in enabling plants to respond to various environmental stresses, contributing significantly to plant survival and adaptability.
