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Plant and Cell Physiology, 1990, Vol. 31, No. 4 551-555
© 1990

Article

Effects of Sugars on the Glucosylation of Exogenous Hydroquinone by Catharanthus roseus Cells in Suspension Culture

Mineyuki Yokoyama, Shinji Inomata, Susumu Seto and Mitsuo Yanagi

Bio-Science Division, Shiseido Basic Research Laboratories 1050 Nippa-cho, Kohoku-ku, Yokohama, 223 Japan

The effects of sugars on the glucosylation of exogenous hydroquinone (HQ) was investigated by supplying individual sugars simultaneously with HQ to a suspension culture of Catharanthus roseus cells. The production of arbutin was enhanced as much as 2- to 3-fold by sucrose or glucose at concentrations of up to 6%, with the enhancement being directly dependent on the concentration of the sugar. The exogenously added sugar was not metabolized and remained unchanged. Sorbitol also promoted the production of arbutin in a similar manner.

Sucrose improved the viability of cells and, in cultures supplied with sucrose and HQ, the activity of UDP-glucose: hydroquinone glucosyltransferase increased over a much longer period of time than that in control cultures supplemented with HQ only.

(Received December 11, 1989; Accepted March 26, 1990)
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