Identification of constituent herbs in ginseng decoctions by DNA markers
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AbstractBackground: DNA in herbal decoctions is usually fragmented by extensive boiling and is usually regarded as unsuitable for molecular authentication. This study aims to evaluate the feasibility for molecular authentication methods by multiplex polymerase chain reaction (PCR) and DNA sequencing for decoctions.Methods: The DNA extraction procedure, sample pulverization and boiling time were examined in (1) single herb decoction withPanax ginseng(" ginseng") orP. quinquefolius(" American ginseng"), (2) decoctions of two classical ginseng prescriptions of five herbal materials (Aconitum carmichaeli,Atractylodes macrocephala,P. ginseng,Glycyrrhiza uralensisandZingiber officinale) and (3) a commercial ready-to-serve ginseng soup. Primers were designed from 26S-18S, ITS2 and trnH-psbA region, with DNA sequences obtained from GenBank. Multiplex PCR was also employed in ginseng or American ginseng decoctions to differentiate between these two herbs.Results: All six herbal species tested in this study could be identified in decoctions. We had four main observations: (1) sample pulverization before boiling improved PCR detection; (2) prolonged boiling increased the DNA concentration but decreased the intactness of DNA fragments; (3) ginseng could be differentiated from American ginseng by multiplex PCR; (4) identification of individual herbs in multi-herb decoctions with prolonged boiling time of 180 min could be achieved.Conclusions: DNA could be amplified from extensively boiled ginseng decoctions, multi-herb decoctions and commercial soup although DNA degradation was critical to successful PCR.
All Author(s) ListLo Y.-T., Li M., Shaw P.-C.
Journal nameChinese Medicine
Volume Number10
Issue Number1
PublisherBioMed Central
Place of PublicationUnited Kingdom
LanguagesEnglish-United Kingdom
KeywordsDecoction, DNA marker, DNA sequencing, Ginseng, Molecular authentication, Multiplex PCR

Last updated on 2020-16-10 at 03:16