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[Study on the identification of ganoderma by multi-steps infrared macro-fingerprint method]
Xiao-kang Chen1, Dong-lan Huang, Su-qin Sun
1Department of Chemistry, Shaoguan College, Shaoguan 512005, China. chk@sgu.edu.cn
Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu
|March 23, 2010
Summary
The multi-steps infrared macro-fingerprint method effectively distinguishes four Ganoderma species. This technique analyzes glucoside and amino acid peptide compounds, revealing differences in their content across Ganoderma lucidum, Ganoderma atrum, Ganoderma tsugae, and Ganoderma lipsiense.
Area of Science:
- Mycology
- Analytical Chemistry
- Spectroscopy
Background:
- Accurate identification of Ganoderma species is crucial for their medicinal applications.
- Traditional methods may lack the precision to differentiate closely related species.
- Ganoderma species are known for their rich glucoside and amino acid peptide content.
Purpose of the Study:
- To establish a reliable method for discriminating between Ganoderma lucidum, Ganoderma atrum, Ganoderma tsugae Murr., and Ganoderma lipsiense.
- To investigate the differences in glucoside and amino acid peptide compound content among these four Ganoderma species.
- To validate the efficacy of the multi-steps infrared macro-fingerprint method for Ganoderma species identification.
Main Methods:
- Application of a multi-steps infrared macro-fingerprint technique.
- Analysis of 1D-1R spectra, focusing on characteristic peaks at 1153 and 1078 cm(-1) for glucoside compounds.
- Examination of second derivative IR spectra (1600-1720 cm(-1)) for amino acid peptide compounds.
- Utilizing 2D-IR spectra to analyze autopeaks related to glucoside compounds.
Main Results:
- The order of glucoside compound content was determined as Ganoderma lucidum > Ganoderma atrum > Ganoderma tsugae Murr. > Ganoderma lipsiense.
- Second derivative IR spectra clearly resolved differences in amino acid peptide compounds.
- 2D-IR spectra revealed distinct autopeak patterns and strongest autopeak positions for each species, confirming variations in glucoside profiles.
- The multi-steps infrared macro-fingerprint method successfully differentiated the four Ganoderma species.
Conclusions:
- The multi-steps infrared macro-fingerprint method is a valid and effective tool for the precise identification and differentiation of Ganoderma lucidum, Ganoderma atrum, Ganoderma tsugae Murr., and Ganoderma lipsiense.
- Significant variations in glucoside and amino acid peptide compound content exist among these four Ganoderma species.
- This spectroscopic approach provides valuable insights into the chemical composition and taxonomic relationships within the Ganoderma genus.
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