UDP-glucose-dependent glucosyltransferase catalyzing the c-glucosylation of 2-hydroxyflavanones. Acts preferentially on the dibenzoylmethane tautomers formed in equilibrium with 2-hydroxyflavanones. No activity with naringenin or naringenin chalcone. a 3'-hydro-2'-hydroxy-beta-oxodihydrochalcone + UDP-alpha-D-glucose = a 3'-(beta-D-glucopyranosyl)-2'-hydroxy-beta-oxodihydrochalcone + H(+) + UDP kcat is 0.76 sec(-1) with 2,5,7-trihydroxyflavanone as substrate. kcat is 3.13 sec(-1) with 2-hydroxynaringenin as substrate. kcat is 0.75 sec(-1) with 2',4',6'-trihydroxydihydrochalcone as substrate. kcat is 10.84 sec(-1) with phoretin as substrate. kcat is 0.11 sec(-1) with 2,4,6-trihydroxybenzophenone as substrate. Belongs to the UDP-glycosyltransferase family.