Glucosyltransferase acting preferentially on aromatic substrates of the phenylpropanoid types. The best substrates are scopoletin and esculetin. Required for full resistance to virus. scopoletin + UDP-alpha-D-glucose = H(+) + scopolin + UDP Up-regulated by elicitor, salicylic acid and virus infection. Belongs to the UDP-glycosyltransferase family.