Article
AGO2, RDR2, and HEN1 comprise a non-canonical DCL4-mediated antiviral pathway independent of DRB4.
Plant physiology - 6 May 2026
Fu Yan, Zhang Chunwei, Xu Yun, Ruan Mengbin, Ren Yanli, Wu Kunxin, Zhang Xiuchun
Abstract excerpt
Plants employ multiple, redundantly acting Dicer enzymes in a layered antiviral defense system. While Dicer-like 4 (DCL4), aided by its cofactor dsRNA-binding protein 4 (DRB4), serves as the primary antiviral Dicer, the genetic architecture and effector components of its DRB4-independent activity have remained enigmatic. Here, through systematic genetic analysis in Arabidopsis (Arabidopsis thaliana), we delineate...
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