Specifically recognizes and binds N6-methyladenosine (m6A)-containing RNAs, and regulates mRNA stability (Probable). M6A is a modification present at internal sites of mRNAs and some non-coding RNAs and plays a role in mRNA stability and processing (Probable). Required for the correct timing of leaf formation and normal leaf morphology (PubMed:29643069). Localizes to cytoplasmic foci upon drought stress. Expressed in the shoot apex, at the sites of leaf formation, and in emerging leaves. No visible phenotype under normal growth conditions, but the delayed leaf emergence and leaf morphology defect of the double mutant ect2 and ect3 is enhanced in the triple mutant ect2, ect3 and ect4.