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Houttuynia (Houttuynia cordata Thunb) Houttuynia Saururaceae is a perennial herb, the Ministry of Health has been formally identified as \The Houttuynia Is a set of nutrition, health care, medical functions in one valuable wildlife resources, has a very extensive clinical use. At home and abroad on of Houttuynia the research more, mostly concentrated in the volatile components, there is a considerable part of the study of other chemical ingredients; addition, the study also has been reported in the pharmacological and clinical, separation and extraction of the chemical composition, propagation and cultivation, etc. , many researchers have great interest to the study of Houttuynia Houttuynia study also shows that in the past, and now for a long period of time are a hot research topic is difficult, from another point of view. This paper aims comparative study of Houttuynia the chemical composition, including flavonoids and volatile components, explore different regions of Guizhou Houttuynia chemical composition of the similarities and differences in the country for the first time on the volatile oil portion suppress plant pathogens effect study studies have shown that of Houttuynia the volatile components of the Gibberella wheat (the Gibberella saubinetii (mont.) Sacc), Rhizoctonia solani (Rhizoctonia solani Kuhn), Fusarium (Fusarium graminearum Schwabe), Phytophthora capsici (Phytophthora capsiei Leonian,) , rice blast fungus (Magnaporthegrisea (Hebert) Barr.) good antibacterial effect, the bacteria are fungi, and to provide a basis for the depth of research and development in Houttuynia. This article describes the origins of Houttuynia, distribution, biological characteristics, chemical composition and pharmacological effects, the medicine use value, food value and health care function and the use of development prospects, and this article discusses the purpose and significance. Determination of the content of the the Houttuynia total flavonoids studied, extract investigated decoction cooking method, alcohol extraction, Soxhlet extraction and ultrasonic extraction; different extraction methods on total flavonoids as index The total flavonoid content of Houttuynia extract on the stability of the extraction process and the extraction process of total flavonoids were studied. This section also examined the content of flavonoids in Houttuynia different parts. The results showed that: the the Houttuynia different parts of the total flavonoids extraction method differences; same origin Houttuynia root of total flavonoids lowest, stems followed by leaves highest; differences in the content of total flavonoids of different origin. Shimadzu HPLC simultaneous determination of the Houttuynia Zhongshan Nai phenol-3-O-of β-O-glucoside, hyperin, quercetin, rutin, quercetin, kaempferol, isorhamnetin seven kinds flavonoids in experimental use 50% ethanol as the extraction solvent, Dumas C18 column (4.6 × 250mm, 5μm) were isolated, gradient elution with acetonitrile -0.1% phosphoric acid solution, using the PDA UV wavelength detector kaempferol phenol-3-O-β-D-glucoside, hyperin, quercetin, rutin, quercetin, kaempferol, iso isorhamnetin full wavelength scanning, 320nm at seven kinds of substances than good sensitivity the methodological study results show that the method is accurate, specific, sensitivity and stability are good, reliable measurement method, measurement results can objectively reflect Houttuynia Zhongshan Nai phenol-3-O-β- D-glucoside, hyperin, quercetin, rutin, quercetin, kaempferol prime isorhamnetin content, the development of the experimental results Houttuynia herbs have important implications. The different origin Houttuynia Zhongshan Nai phenol-3-O-of β-D-glucoside, hyperin, quercetin, rutin, quercetin, kaempferol, isorhamnetin content there are big differences . The use of the the Shimadzu QP2010 Model GC-MS in Guizhou Houttuynia content of volatile oil components and their similarity analysis. The results showed high similarity of the fingerprints of 10 batches of samples generated Fingerprint mode and 12 common peaks volatile oil quality standards can be used as an evaluation Houttuynia, 10 batches of of Houttuynia samples of similarity are more than 90%, not the outlier sample, in line with the requirements of the State Drug Administration of TCM fingerprint similarity. Houttuynia volatile oil part of the antibacterial activity, the strains selected vegetable pathogens, including: Rhizoctonia solani, Fusarium wheat, Fusarium, Phytophthora capsici, blast monocytogenes five kinds. The results showed that different inhibitory concentration (IC50) of different pathogens, volatile oil the volatile oil Rhizoctonia fungus IC50 Houttuynia minimum 81.24μg/mL; the IC50 largest rice blast fungus to 320.21μg/mL ; IC50 of wheat Gibberella, Fusarium, Phytophthora capsici 209.86,312.75,245.09 μg / mL.
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