SUN Ting,YANG Yuzhen,HU Shuxiao,et al.Identification and Quality Evaluation of Dendrobium flexicaule and Its Related Species[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(20):128-134.
SUN Ting,YANG Yuzhen,HU Shuxiao,et al.Identification and Quality Evaluation of Dendrobium flexicaule and Its Related Species[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(20):128-134. DOI: 10.13422/j.cnki.syfjx.20220652.
Identification and Quality Evaluation of Dendrobium flexicaule and Its Related Species
and its related species, and analyze the differences in polysaccharide composition and
D
-mannose content, so as to provide theoretical basis for the accurate identification and quality control of
Dendrobium
medicinal materials.
Method
2
Nine samples of
Dendrobium
(S1-S9) were identified by DNA barcoding and infrared spectroscopy, and the contents of polysaccharides and
D
-mannose were determined by ultraviolet spectrophotometry (UV) and high performance liquid chromatography (HPLC), respectively. UV detection condition was 488 nm, HPLC detection conditions were the mobile phase of 20 mmol·L
-1
ammonium acetate solution-acetonitrile (81.5∶18.5) and the detection wavelength at 250 nm.
Result
2
DNA barcoding results showed that samples S1-S3 were
D. nobil
e, samples S4-S5 were
D. officinale
, sample S6 was
D. huoshanense
, and S7-S9 were
D. flexicaule
. One-dimensional infrared spectroscopy showed that only
D. nobile
had stable characteristics at the wavenumber of 1 570-1 467 cm
-1
, showing a "W" shape, while no absorption peak was found at the wavenumber of 842-740 cm
-1
, but the other
Dendrobium
samples had stable absorption peaks at the wavenumber of 842-740 cm
-1
. In the first derivative spectrum, at the wavenumber of 785 cm
-1
,
D. huoshanense
presented a "V" shape, while the rest of
Dendrobium
presented a "W" shape. At the wavenumber of 1 110 cm
-1
,
D. flexicaule
had a stable characteristic peak. In the second derivative spectrum, at the wavenumber of 1 125 cm
-1
,
D. officinale
presented an "M" shape, and the rest of
Dendrobium
was approximately "W" shape. The results of determination showed that the contents of polysaccharides in samples S1-S9 were 9.35%, 9.12%, 32.78%, 49.38%, 48.97%, 32.48%, 32.95%, 39.41% and 25.32%, and their contents of
D
-mannose were 1.39%, 0.47%, 13.57%, 3.04%, 33.85%, 23.57%, 16.64%, 17.47% and 19.49%, respectively. Among them,
D. flexicaule
had high polysaccharide and
D
-mannose contents.
Conclusion
2
Both DNA barcoding and infrared spectroscopy can be used to identify
D. flexicaule
and its related species, and infrared spectroscopy is cost-effective and easy to operate. At the same time,
D. flexicaule
has high contents of polysaccharides and
D
-mannose, which can provide a scientific basis for rapid identification of
D. flexicaule
and its relatives, and provides a reference for its quality control, and resource development and utilization.
Shandong Technical Innovation Center for Traditional Chinese Medicine Treatment of Respiratory Diseases,Shandong Hongjitang Pharmaceutical Group Co. Ltd.
Shandong Institute for Food and Drug Control
School of Pharmacy,State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine