Antimicrobial activity of the dichloromethane extract from in vitro cultured roots of Morinda royoc and its main constituents.

The dichloromethane extract and seven anthraquinones isolated from in vitro cultured roots of Morinda royoc L. were tested for their antimicrobial activity against seven yeast and seven bacterial strains. The extract showed a minimum inhibitory concentration (MIC) value of 15.