Multiple choice Which of the following viral plant pathogens requires CMV's P1 protein for infection? Commelina mosaic virus Cocksfoot mottle virus Clover yellow mosaic virus Clover yellow vein virus Reveal answer Fill a bubble to check yourself B Correct answer Explanation Cocksfoot mottle virus requires CMV's P protein for infection. The CMVP-protein interferes with RNAi pathways in Nicotiana benthamiana and Nicotiana tabacum.