As one of the local medicinal herbs in Henan Province, the fresh product of Dihuang (Rehmanniae Radix) has the function of clearing heat and generating fluids, cooling blood and stopping bleeding. The raw product has the effect of clearing heat and cooling blood, nourishing Yin and generating fluids and the processed product has the function of replenishing blood and nourishing Yin and benefiting the essence and filling in the marrow. Currently, there is a single method for quality evaluation of Dihuang (Rehmanniae Radix), therefore, based on the traditional Chinese medicine theory that “the raw product is especially good”, “combination of raw and processed products”, the studies on the chemical composition and pharmacological effects of Dihuang (Rehmanniae Radix) before and after processing were summarized. Combined with the quality marker (Q-Marker) prediction analysis from the aspects of plant affinity and chemical constituents, traditional efficacy and clinical compatibility, traditional medicinal properties and material basis, concoction method and auxiliary material differences, blood components and pharmacokinetics, dihuangoside A, mauritiana glycoside, catalpol, stachyose, quercetin, baicalein, sanguinarol, polysaccharide, hesperidin, digitonin and dihuangoside D can be regarded as the most important chemical constituents in the traditional Chinese medicine, which can be used for the quality evaluation of Dihuang (Rehmanniae Radix), with the aim of providing a reference for the quality control study of Dihuang (Rehmanniae Radix), the guidance of clinical use and the development of new drugs.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |