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Expression of 2b Does Not Play a Direct Role in Eliciting Disease Symptoms.
Wild-type, dcl2-1 dcl3-1, dcl2-1 dcl4-2, and dcl2-1 dcl3-1 dcl4-2 plants were photographed at 5 d (A) and 14 d (B) after infection with CMV, CMV-Δ2b, or buffer (mock).