Active constituents in Rheum acuminatum and Rheum australe (Polygonaceae) roots: A variation between cultivated and naturally growing plants

► We consider Rheum acuminatum and Rheum australe. ► We determine and compare concentration of phytochemicals in roots. ► Variation in concentration of phytochemicals in cultivated and naturally growing plants. ► Emodin and physicon higher in concentration R. acuminatum than R. australe but opposite for chrysophanol.