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. 2022 Nov 12;27(22):7802.
doi: 10.3390/molecules27227802.

Analysis of Components and Properties of Extractives from Alnus cremastogyne Pods from Different Provenances

Guoxi Chen  1   2 , Fangya Pan  1   2 , Yemei Gao  1   2 , Hao Li  1   2 , Xiaqing Qin  1   2 , Yongze Jiang  1   2 , Jinqiu Qi  1   2 , Jiulong Xie  1   2 , Shanshan Jia  1   2
Affiliations

Analysis of Components and Properties of Extractives from Alnus cremastogyne Pods from Different Provenances

Guoxi Chen et al. Molecules. .

Abstract

Chemical components with anti-oxidant, anti-inflammatory, and anti-cancer properties extracted from Alnus bark and leaves have been extensively studied. However, less attention has been paid to extractives from Alnus pods, which are mostly treated as waste. Here, extractives of Alnus cremastogyne pods from 12 provenances in Sichuan Province were studied for high value-added utilization of Alnus waste. The extractives were analyzed by Gas Chromatography-Mass Spectrometer (GC-MS), Ultraviolet-visible spectroscopy (UV-Vis spectra), and 1,1-diphenyl-2-picrylhydrazyl (DPPH) scavenging activity. A total of 58, 49, and 51 chemical components were found when the organic solvents of ethanol, petroleum ether, and ethyl acetate were used to collect extractives, respectively. These chemical components including Phytol, CIS-5,8,11,14,17-eicosapentaenoic acid, Germacrene D, Lupeol, and β-sitosterol, etc., have wide applications in the fields of pharmacy and cosmetics. Moreover, it was also found that extractives in ethanol and ethyl acetate had impressive UV resistance, especially for UV-C and UV-B blocking. The results showed that the maximum block ratio towards UV-C and UV-B could reach 99%. In addition, the ethanol extract showed good anti-oxidant activity with a maximum free radical scavenging rate of 96.19%. This comprehensive and systematic study on extractives from Alnus cremastogyne pods promotes the development of high-value utilization of Alnus components.

Keywords: Alnus cremastogyne pods; UV absorbability; anti-oxidant activity; extractives.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
The map of different Alnus cremastogyne collection sites.
Figure 2
Figure 2
GC-MS chromatograms of the volatile components of the ethanol extractives of Alnus cremastogyne pods.
Figure 3
Figure 3
GC-MS chromatograms of the volatile components of the petroleum ether extractives of Alnus cremastogyne pods.
Figure 4
Figure 4
GC-MS chromatograms of the volatile components of the ethyl acetate extractives of Alnus cremastogyne pods.
Figure 5
Figure 5
Transmittance spectra of the ethanol extractives from Alnus cremastogyne pods.
Figure 6
Figure 6
Transmittance spectra of the petroleum ether extractives from Alnus cremastogyne pods.
Figure 7
Figure 7
Transmittance spectra of the ethyl acetate extractives from Alnus cremastogyne pods.
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