SNAC4/9 negatively regulate the resistance of tomatoes to B. cinerea by suppressing phenylpropanoid metabolic pathway. (PubMed, Plant Sci) - Jun 17, 2026 - "Exogenous chlorogenic acid (CGA) demonstrates a tripartite synergistic mechanism: directly inhibiting pathogen growth, downregulating SNAC4/9 expression, and reactivating phenylpropanoid biosynthetic genes and enzymatic (phenylalanine ammonia-lyase (PAL), cinnamate 4-hydroxylase (C4H), and chalcone synthase (CHS)) activities via feedback loops to promote defense metabolite accumulation, ultimately delaying fruit disease onset. This study deciphers the cascade regulatory network of the SNAC4/9-phenylpropanoid pathway, revealing novel dimensions of SNAC4/9-mediated defense in fruit. It establishes both a theoretical foundation for disease-resistant breeding and sustainable postharvest management, and an actionable solution for implementing green preservation technologies that replace chemical fungicides."
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Caie Wu; Jinting Lu; Linxiang Qiao; Sen Cao; Xiaohong Kou; Xiaohui Qi; Xiaoyang Zhao; Yijie Sun; Zhaohui Xue
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