Rumex species are perennial herbs belonging to the Polygonaceae family, which are widely distributed across eastern Asia. These herbs have been used in folk medicine to treat gastric disease. However, there is no previous report about pharmacognostical study of these herbs. In this study, anatomical...
Rumex species are perennial herbs belonging to the Polygonaceae family, which are widely distributed across eastern Asia. These herbs have been used in folk medicine to treat gastric disease. However, there is no previous report about pharmacognostical study of these herbs. In this study, anatomical characterization and chemical profiling were carried out to differentiate among five Rumex species, i.e., R. acetosa, R. acetosella, R. crispus, R. japonicus, and R. longifolius from Korea. The inner morphological characteristics of these specimens were observed using transverse or vertical sections, which were prepared using a microslicer or a handslicer. HPLC-DAD analysis was preformed to verify the differences in chemical profiles among the species. Druse was found in the upper surface of R. acetosa leaves only. R. acetosa and R. acetosella showed V-like petioles, while the other species displayed elliptical ones. Fewer vascular bundles were observed in the transverse sections of the petiole of R. acetosa and R. acetosella. R. longifolius showed the highest number of vascular bundles in the stem. In addition, the five species could be differentiated by other innnermorphological criteria such as the shape of the main vein of leaves, number of collenchyma cell layers, and the frequency of stomata. While the root
While the before flowering season root of R. crispus showed the highest content (7.63 mg/g∙DW) of the three major anthraquinones, emodin (1), chrysophanol (2) and physcion (3), it exhibited the lowest content (4.08 mg/g∙DW) of three anthraquinone glycosides, emodin-8-O-β-D-glucopyranoside (4), chrysophanol-8-O-β-D-glucopyranoside (5) and physcion-8-O-β-D-glucopyranoside (6). In contrast, while the content (1.57 mg/g∙DW) of the three anthraquinones was lowest in the before flowering season root of R. acetosa, this species exhibited a high content (6.22 mg/g∙DW) of the three glycosides. These significantly different aspects, including other parameters in HPLC profiles, should be key factors to differentiate among the five Rumex species. The OPLS-DA combined the inner morphological results and HPLC profiles clearly classified the five species. R. acetosa extract, emodin (1) and chrysophanol-8-O-β-D-glucopyranoside (5) showed potent anti-H. pylori activity. Physcion (3) and chrysophanol-8-O-β-D-glucopyranoside (5) displayed anti-cytotoxic activity against a gastric epithelial cancer cell line, AGS cells. Further studies should be accomplished to elucidate the mechanisms of biological activities and R. acetosa can be used remedy for gastrointestinal diseases.
Therefore, the results of inner morphological, HPLC profiling provide scientific evidence to distinguish from five Rumex species, and R. acetosa can be used remedy for gastrointestinal diseases.
Rumex species are perennial herbs belonging to the Polygonaceae family, which are widely distributed across eastern Asia. These herbs have been used in folk medicine to treat gastric disease. However, there is no previous report about pharmacognostical study of these herbs. In this study, anatomical characterization and chemical profiling were carried out to differentiate among five Rumex species, i.e., R. acetosa, R. acetosella, R. crispus, R. japonicus, and R. longifolius from Korea. The inner morphological characteristics of these specimens were observed using transverse or vertical sections, which were prepared using a microslicer or a handslicer. HPLC-DAD analysis was preformed to verify the differences in chemical profiles among the species. Druse was found in the upper surface of R. acetosa leaves only. R. acetosa and R. acetosella showed V-like petioles, while the other species displayed elliptical ones. Fewer vascular bundles were observed in the transverse sections of the petiole of R. acetosa and R. acetosella. R. longifolius showed the highest number of vascular bundles in the stem. In addition, the five species could be differentiated by other innnermorphological criteria such as the shape of the main vein of leaves, number of collenchyma cell layers, and the frequency of stomata. While the root
While the before flowering season root of R. crispus showed the highest content (7.63 mg/g∙DW) of the three major anthraquinones, emodin (1), chrysophanol (2) and physcion (3), it exhibited the lowest content (4.08 mg/g∙DW) of three anthraquinone glycosides, emodin-8-O-β-D-glucopyranoside (4), chrysophanol-8-O-β-D-glucopyranoside (5) and physcion-8-O-β-D-glucopyranoside (6). In contrast, while the content (1.57 mg/g∙DW) of the three anthraquinones was lowest in the before flowering season root of R. acetosa, this species exhibited a high content (6.22 mg/g∙DW) of the three glycosides. These significantly different aspects, including other parameters in HPLC profiles, should be key factors to differentiate among the five Rumex species. The OPLS-DA combined the inner morphological results and HPLC profiles clearly classified the five species. R. acetosa extract, emodin (1) and chrysophanol-8-O-β-D-glucopyranoside (5) showed potent anti-H. pylori activity. Physcion (3) and chrysophanol-8-O-β-D-glucopyranoside (5) displayed anti-cytotoxic activity against a gastric epithelial cancer cell line, AGS cells. Further studies should be accomplished to elucidate the mechanisms of biological activities and R. acetosa can be used remedy for gastrointestinal diseases.
Therefore, the results of inner morphological, HPLC profiling provide scientific evidence to distinguish from five Rumex species, and R. acetosa can be used remedy for gastrointestinal diseases.
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