Ft-Nir Spectroscopy of Boletus Bainiugan from a New Perspective

Abstract

Boletus bainiugan is popular as a green, sustainable resource with high nutritional value. Differences in quality due to geographic factors are not known. In this study, the MaxEnt model was used to simulate the species distribution of Boletus bainiugan under the current climate scenario. Chemical composition determination and FT-NIR spectral collection were performed and combined with chemometrics to synthesize the origin of Boletus bainiugan. The results showed that Yunnan is a suitable growing place for Boletus bainiugan, with 87.9% of the high suitability area, the chemical composition of the high suitability area was differentiated. Bio7 and bio2 favoring the accumulation of uridine, while bio1, bio3, and bio10 were negatively correlated with it. Bio17 synergized with tk had positive correlation with the accumulation of guanosine. A single ingredient does not effectively identify origin, the FT-NIR spectra after 2nd Der combined with the OPLS-DA model were able to identify the different origins, with R2 and Q2 of 0.925286 and 0.861792, training and test sets all of 100%. Analyzing the correlation between characteristic wavenumber points and the environmental variables, it was found that bio1, bio3, and bio10 were negatively correlated with 4626.38cm-1, and the reason for this may be the difference in uridine. Tk had a positive correlation with 8365.79cm-1,5793.81cm-1,and bio17 had a positive correlation with 4257cm-1, indicating that the absorption peaks are due to guanosine. The differential components were mainly compounds associated with the 4763.19cm-1,4626.38cm-1,5793.81cm-1,4329.96cm-1. This result demonstrates that FT-NIR spectroscopy is a simpler, faster analytical method and contains comprehensive spectral information.

Keywords: Boletus bainiugan, Suitable habitats, Nutrient composition, FT-NIR spectroscopy, Origin identification