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Cell Host & Microbe - Positive Gene Regulation by a Natural Protective miRNA Enables Arbuscular Mycorrhizal Symbiosis

Cell Host & Microbe - Positive Gene Regulation
Arbuscular mycorrhizal symbiosis, a plant-fungal mutualistic relationship, is regulated by the miR171 family. Couzigou et al. discover that miR171b has evolved a target site mismatch such that instead of silencing, miR171b protects its target gene LOM1 from cleavage by other miR171 family members and thereby enables AM symbiosis.