Title: Dynamic Changes of Flavonoids Levels in Scutellaria baicalensis Georgi Roots during Drying Process under the Sun
Abstract: The post-harvest drying process is actually an anti-dehydration physiological process for freshly collected medicinal materials especially roots.For this reason,these materials would activize the anti-stress mechanism and thus would upgrade levels of bioactive components during the early phase of drying process.Based on this hypothesis,the contents of baicalin,baicalein,wogonside,wogonin were determined by HPLC,and gene expressions of CHS and BG were detected by RT-PCR,in intact and sliced Huangqin(Scutellaria baicalensis Georgi) samples during the drying process under sun.The results demonstrated that the content of baicalin in fresh samples of S.baicalensis is 85.58mg/g;in 15 days(intact samples) and 9 days(sliced samples) of insolation this value increased 107.8% and 74.4%,respectively;then it decreased rapidly to 109.3mg/g(intact samples) and 69.2mg/g(sliced samples).Both levels of baicalin and total flavonoids showed an inverse V-shape,i.e.,upgraded at first and then degraded,during the entire drying process.Further analysis revealed that this type of dynamic changes of flavonoids was resulted from the possession of anti-drying physiological mechanism in S.baicalensis roots.The intact samples could more efficiently preserve and trigger this mechanism than the sliced samples and thus would more favorable for the increase of baicalin.
Publication Year: 2010
Publication Date: 2010-01-01
Language: en
Type: article
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Cited By Count: 3
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