Varietal Authenticity Assessment of QTMJ Tea Using Non-Targeted Metabolomics and Multi-Elemental Analysis with Chemometrics

Huahong Liu; Yuxin Wu; Ziwei Zhao; Zhi Liu; Renjun Liu; Yuelan Pang; Chun Yang; Yun Zhang; Jinfang Nie

doi:10.3390/foods12224114

Foods (Nov 2023)

Varietal Authenticity Assessment of QTMJ Tea Using Non-Targeted Metabolomics and Multi-Elemental Analysis with Chemometrics

Huahong Liu,
Yuxin Wu,
Ziwei Zhao,
Zhi Liu,
Renjun Liu,
Yuelan Pang,
Chun Yang,
Yun Zhang,
Jinfang Nie

Affiliations

Huahong Liu: College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
Yuxin Wu: College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
Ziwei Zhao: College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
Zhi Liu: College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi 417000, China
Renjun Liu: College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
Yuelan Pang: Guangxi Research Institute of Tea Science, Guilin 541004, China
Chun Yang: Guangxi Research Institute of Tea Science, Guilin 541004, China
Yun Zhang: College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
Jinfang Nie: College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China

DOI: https://doi.org/10.3390/foods12224114
Journal volume & issue: Vol. 12, no. 22
p. 4114

Abstract

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In this paper, a combination of non-targeted metabolomics and multi-element analysis was used to investigate the impact of five different cultivars on the sensory quality of QTMJ tea and identify candidate markers for varietal authenticity assessment. With chemometric analysis, a total of 54 differential metabolites were screened, with the abundances significantly varied in the tea cultivars. By contrast, the QTMJ tea from the Yaoshan Xiulv (XL) monovariety presents a much better sensory quality as result of the relatively more abundant anthocyanin glycosides and the lower levels of 2′-o-methyladenosine, denudatine, kynurenic acid and L-pipecolic acid. In addition, multi-elemental analysis found 14 significantly differential elements among the cultivars (VIP > 1 and p < 0.05). The differences and correlations of metabolites and elemental signatures of QTMJ tea between five cultivars were discussed using a Pearson correlation analysis. Element characteristics can be used as the best discriminant index for different cultivars of QTMJT, with a predictive accuracy of 100%.

Published in Foods

ISSN: 2304-8158 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Chemical technology
Website: http://www.mdpi.com/journal/foods

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Abstract

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