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Traceability Research on Dendrobium devonianum Based on SWATHtoMRM.

Tao Lin1, Xinglian Chen1, Lijuan Du1

  • 1Quality Standards and Testing Technology Research Institute, Yunnan Academy of Agricultural Sciences, Kunming 650205, China.

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Summary
This summary is machine-generated.

SWATHtoMRM technology effectively traced Dendrobium origins by analyzing chemical differences between Dendrobium devonianum and Dendrobium officinale. This pseudotargeted metabolomics approach identified characteristic compounds and metabolic pathways, aiding variety improvement.

Keywords:
Dendrobium devonianumLongling areaidentificationtime-of-flight mass spectrometry

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Area of Science:

  • Metabolomics
  • Analytical Chemistry
  • Pharmacognosy

Background:

  • Differentiating closely related medicinal plants like Dendrobium devonianum and Dendrobium officinale is crucial for quality control and traceability.
  • Traditional methods often struggle to distinguish between species with similar origins and appearances.
  • Advanced analytical techniques are needed to uncover subtle biochemical differences.

Purpose of the Study:

  • To develop and apply a pseudotargeted metabolomics method for the traceability and identification of Dendrobium devonianum and Dendrobium officinale.
  • To investigate the distinct chemical compositions of these two Dendrobium species.
  • To identify characteristic compounds and enriched metabolic pathways for potential use in variety improvement.

Main Methods:

  • Utilized SWATHtoMRM technology combined with Time-of-Flight (TOF) and Multiple Reaction Monitoring (MS-MRM) mass spectrometry.
  • Processed data using an R package to obtain MRM pairs (191 positive, 96 negative ions).
  • Applied Principal Component Analysis (PCA) and Partial Least Squares Discriminant Analysis (PLS-DA) for data analysis and species differentiation.

Main Results:

  • Successfully separated Dendrobium devonianum and Dendrobium officinale based on their MRM ion profiles, indicating significant chemical composition differences.
  • Identified 146 characteristic compounds, with 20 unique to Dendrobium devonianum.
  • Enrichment analysis revealed key pathways including lipids and atherosclerosis, sphingolipid signaling, and arginine/proline metabolism, with 11 compounds impacting inflammatory markers.

Conclusions:

  • The pseudotargeted metabolomics approach based on SWATHtoMRM is effective for the traceability and identification of Dendrobium species.
  • Significant metabolic differences exist between Dendrobium devonianum and Dendrobium officinale, offering potential biomarkers.
  • The identified characteristic compounds and pathways provide valuable insights for Dendrobium breeding and the accumulation of active substances.