Exogenous H₂O₂ regulated secondary metabolism of Scutellaria baicalensis and enhanced drug quality.
10.19540/j.cnki.cjcmm.20171030.009
- Author:
Xiao-Ying FU
1
;
Hui-Min GUO
1
;
Wei CONG
1
;
Xiang-Cai MENG
1
Author Information
1. Heilongjiang University of Chinese Medicine， Harbin 150040, China.
- Publication Type:Journal Article
- Keywords:
Scutellaria baicalensis;
antioxidase;
flavonoids;
phenylalnine ammonialyase;
secondary metabolism
- MeSH:
Ascorbate Oxidase;
metabolism;
Catalase;
metabolism;
Drugs, Chinese Herbal;
chemistry;
Flavanones;
analysis;
Flavonoids;
analysis;
Glucosides;
analysis;
Glucuronidase;
metabolism;
Hydrogen Peroxide;
Peroxidase;
metabolism;
Phenylalanine Ammonia-Lyase;
metabolism;
Scutellaria baicalensis;
metabolism;
Secondary Metabolism;
Superoxide Dismutase;
metabolism
- From:
China Journal of Chinese Materia Medica
2018;43(2):271-287
- CountryChina
- Language:Chinese
-
Abstract:
The increasing demand of Chinese materia medica could not be supplied by wild resource, and the cultivated medicinal materials become popular, which led to decreased quality of many medicinal materials due to the difference of the circumstance between the wild and the cultivated. How to improve quality becomes key points of Chinese medicine resource. The leaves of Scutellaria baicalensis were sprayed with H₂O₂, the activities of superoxide dismutase (SOD) and catalase (CAT) changed little, but there had been a marked decrease of peroxidase (POD) and ascorbic oxidase (APX), which showed that the antioxidase system declined. Meanwhile, H₂O₂, as enhanced the expression of phenylalnine ammonialyase (PAL) and β-glucuronidase (GUS) as well as activity of PAL, promoted the biosynthesis and biotransformation of flavonoids. At the day 2 after treated, H₂O₂ of 0.004 μmol·L⁻¹ the contents of the baicalin and the wogonoside decreased slightly, but the contents of the baicalein and the wogonin increased significantly, the baicalein from 0.094% to 0.324%, the wogonin from 0.060% to 0.110%, i. e. increased 246% and 83.3%, respectively.
