O-methyltransferase. Substrate preference is eugenol >> orcinol monomethyl ether > resorcinol monomethyl ether. S-adenosyl-L-methionine + trans-isoeugenol = H(+) + S-adenosyl-L-homocysteine + trans-isomethyleugenol Homodimer. Expressed predominantly in root hairs. Belongs to the class I-like SAM-binding methyltransferase superfamily. Cation-independent O-methyltransferase family. COMT subfamily.