RESUMEN
Objective To authenticate Euryales semen collected from seventeen regions by NIR fingerprint spectra and to establish a rapid analysis method. Methods Spectra were collected by VARIAN CARY5000 ultraviolet visible near infrared spectrophotometer,with correlation and origin clustering method for analysis by using Origin 7. 5 and SPSS 18. 0 software. Results The correlation of peaks for Euryales semen from 17 localities were significant, while the regions were distinguished clearly. Conclusion It is indicated that the method is rapid, lossless, and it can be applied to authenticate Euryales from different regions,which provides reference to rapid inspection of Chinese medicines.
RESUMEN
Objective: To identify Euryales Semen and its closely related species using the ITS2 barcode. Method:The total genomic DNAs were extracted from twenty samples of Euryales Semen and its closely related species. The ITS2 regions of the samples were amplified and bidirectional sequenced. Obtained sequences were submitted to the GenBank with Sequin 12.3. ITS2 sequences of 102 samples belonging to thirty species were downloaded from GenBank. The 122 ITS2 sequences were aligned and the genetic distances were analyzed with MEGA 5.1. Identification analyses were performed using BLAST1 and nearest distance methods, and were presented intuitively by constructing neighbor-joining (NJ) tree. Result: The length of ITS2 region of Euryales Semen was 214 bp, which was only one haplotype. There was significant divergence of the ITS2 regions among the samples. The NJ tree showed that Euryales Semen could be obviously differed from its closely related species, which had good 408 monophyly. Conclusion: ITS2 regions as a DNA barcode can stably and accurately distinguish Euryales Semen from its closely related species and also provide a new technique to ensure clinical safety in utilization of tradi-tional Chinese medicines. The new exploration could broaden the application of DNA barcoding technology in identification of Traditional Chinese Medicine.