数字农科院2.0

A new paradigm for the discrimination of Polygonatum geographical authenticity based on the coupling of stable isotope and secondary metabolites

文献类型： 外文期刊

作者： Xiang Zhu;Qian Li;Yumeng Xia;Qianyu Yao;Zengcai Liang;Yanan Wu;Yan Zhao;Weijun Guan;Taofeng Lu

作者机构：

关键词： Environmental parameters;Polygona-polysaccharose;Polygonatum;Stable isotope;Traceability

期刊名称： Talanta Open

ISSN：

年卷期： 2026 年 13 卷

页码：

收录情况： ESCI（2025版）

摘要： Background The genus Polygonatum, collectively known as Polygonatum or Solomon’s Seal, contains a number of species that have edible tuber-like stems. Technology to trace the origin of harvested plant materials is crucial. Traditional stable isotope tracing utilizes C, H, O, N and even other mineral elements for cluster analysis. This method currently has some shortcomings; if the sample size is small, the resolution will decrease. Additionally, if more stable isotope contents are measured, the costs will significantly increase. It is evident that it is necessary to enhance the accuracy of origin discrimination analysis without increasing the sample size or incurring excessive costs. (101) Results Our study selected five substances: δ 13C, δ 15N, δ 2H, δ 18O, and polygona-polysaccharose in Polygonatum tuber-like stem to distinguish the origin of samples from six cities in southern China. The accuracy of both the original classification and cross-validation accuracy reached 100 %. The use of only four stable substances: δ 13C, δ 15N, δ 2H and δ 18O has reduced the accuracy of original classification and cross-validation to 84.4 % and 75.6 %. In addition, we studied the correlation between δ 13C, δ 15N, δ 2H, δ 18O, and the content of polygona-polysaccharose in Polygonatum samples. There is a linear positive correlation between δ 2H and δ 18O from six cities in south China. The δ 13C, δ 15N, δ 2H, δ 18O, and the content of polygona-polysaccharose and seven environmental parameters were also tested. We found a significant positive correlation between δ 18O vs. latitude, and a significant positive correlation between δ 2H vs. longitude and δ 2H vs. annual evaporation. (138) Significance Our study represents the first origin determination results of the stable isotope of Polygonatum. The accuracy and precision of origin identification using stable isotopes was enhanced by adding the content of polygona-polysaccharose even with a limited sample size. The linear relationship between the proportion of δ 2H and δ 18O in the tuber-like stems of Polygonatum could help us distinguish Polygonatum from other tuber foods. (63)

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