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1.
Article in English | WPRIM | ID: wpr-827212

ABSTRACT

Salvia plebeia has been in use as traditional Chinese medicine (TCM) for more than 500 years. In this study, the complete chloroplast (cp) genome of S. plebeia was sequenced, assembled and compared to those of other five published Salvia cp genomes. It was found that the cp genome structure of S. plebeia was well conserved and had a total size of 151 062 bp. Four parameters were used to display the usage conditions of the codons of the amino acids in Salvia genus. Although the number of protein-coding genes in each species was the same, the total number of codons was different. Except for amino acids Trp and Met whose Relative Synonymous Codon Usage (RSCU) value of one condon was equal to 1, the remaining 19 amino acids had 1-3 preferred codons. The preferred codon names of each amino acid were coincident. The period size for the tandem repeats of six species ranged from 9 to 410 bp. Salvia cp genomes mainly possessed tandem repeats with a copy number less than or equal to 3. The sequence length of tandem repeats of the six species ranged from 25 to 824 bp. Highly viarable regions including four intergenic spacers and six partial genes were discovered as potential specific barcodes for Salvia species through cp genome-wide comparison. Finally, we performed phylogenetic analyses based on the complete cp genome and coding sequences respectively. These results provide information to help construct the cp genome library for Salvia, which may support studies of phylogenetics, DNA barcoding, population and transplastomics.

2.
Article in English | WPRIM | ID: wpr-776860

ABSTRACT

The aim is to select a universal DNA barcode for identifying all poisonous medicinal plants in Chinese pharmacopoeia and their poisonous related species or adulterants. We chose 4 commonly used regions as candidate DNA barcodes (ITS2, psbA-trnH, matK and rbcL) and compared their identification efficiency in 106 species from 27 families and 65 genera totally. Data analysis was performed including the information of sequence alignment, inter/intra-specific genetic distance and data distribution, identification efficiency and the situation of Neighbor-Joining (NJ) phylogenetic trees. We found ITS2 sequence region had high variation, stable genetic distance and identification efficiency relatively. The topological structure of NJ phylogenetic tree showed monophyletic. Our findings show that ITS2 can be applied as a universal barcode for identifying poisonous medicinal plants in Chinese pharmacopoeia and their poisonous related species or adulterants.

3.
Chinese Pharmaceutical Journal ; (24): 1954-1959, 2015.
Article in Chinese | WPRIM | ID: wpr-859294

ABSTRACT

OBJECTIVE: To establish a fast identification method of Panax notoginseng, molecular signature which can be used as fast authentication of P. notoginseng were screened according to comparison results of 248 Panax ITS2 sequences from GenBank and 46P. notoginseng ITS2 sequences from this study. METHODS: ITS2 Sequences obtained in this study were assembled using Codoncode Aligner, and then were imported to MEGA 6.0 together with Panax ITS2 sequences from GenBank. The comparison was conducted using MUSCLE method and then unique molecular signature of P. notoginseng was found in this comparison results. RESULTS: The length of ITS2 sequences of P. notoginseng was 230 bp, and the aligned ITS2 sequences of Panax was 258 bp. Based on one SNP site of P. notoginseng, one unique molecular signature was developed, 5'-AACCCATCAT TCCCTCGCGG GAGTCCATGC GGAGG-3'. If unknown samples contained the signature sequence after amplification, it would be identified to be Panax notoginseng and vice versa. CONCLUSION: The molecular signature obtained from this study can be used for fast authentication of varying kinds of P. notogin: sengcrude drugs and powders and authentication of mixed samples.

4.
Article in Chinese | WPRIM | ID: wpr-310970

ABSTRACT

Genuine medicinal materials with special characteristics of Traditional Chinese Medicine (TCM), is recognized as high quality medicine. Both ancient records and modern research considered that the origin is an important reason for the formation of genuine medicinal materials. However, blindly transplanting of genuine medicinal materials has led to the quality decline and counterfeit medicines appeared in production or sale progress, which may increase the risk of accidents in TCM. Frequent accidents emerged in Chinese herbal affects its export. What's more, it is a great threat to the medication safety in TCM clinical. There is an urgent need to implement traceability systems of TCM, which could provide convenient information record and traceability of TCM circulation. This paper reviews a variety of technical methods for genuine medicinal materials traceability, and proposed the establishment of genuine medicinal materials traceability system based on two-dimensional code and network database.


Subject(s)
Databases, Factual , Drugs, Chinese Herbal , Chemistry , Economics , Reference Standards , Medicine, Chinese Traditional
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