Glycosylation of trans-Resveratrol by Cultured Plant Cells under Illumination of LEDs.

Incubation of cultured cells of Strophanthus gratus with trans-resveratrol gave its 4'-O-ß-D-glucoside as the major product in addition to its 3-O-ß-D-glucoside under white and red light-emitting diodes (LEDs). Use of blue LEDs as light sources for biotransformation of trans-resveratrol much improved the yield of its ß-D-glycosides and changed the composition of products, that is, 3-O-ß-D-glucoside was the major product and 4'-O-ß-D-glucoside was the minor one.