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UPLC-Q-TOF/MS-based metabolomic analysis reveals the effects of asomate on the citrus fruit

文献类型： 外文期刊

作者： He, Guangyun 1 ; Chen, Xi 3 ; Hou, Xue 1 ; Yu, Xi 4 ; Han, Mei 1 ; Qiu, Shiting 1 ; Li, Ying 1 ; Qin, Shudi 1 ; Wang, Fengyi 1 ;

作者机构： 1.Sichuan Acad Agr Sci, Inst Qual Stand & Testing Technol Agroprod, Chengdu 610066, Peoples R China

2.Minist Agr, Lab Qual & Safety Risk Assessment Agroprod Chengdu, Chengdu 610066, Peoples R China

3.SCIEX Analyt Instrument Trading Co, Shanghai 200335, Peoples R China

4.Macau Univ Sci & Technol, Fac Med, Macau 999078, Peoples R China

关键词： Citrus fruits; Citric acid; Asomate; UPLC-Q-TOF/MS; Metabolomics; Chemometrics

期刊名称：CURRENT RESEARCH IN FOOD SCIENCE （ 影响因子：6.3； 五年影响因子：6.3 ）

ISSN：

年卷期： 2023 年 6 卷

页码：

收录情况： SCI

摘要： The regulation of the sugar-acid ratio is of great significance to the improvement of citrus fruit quality. The citric acid level in fruit is influenced by many factors. Among them, cultivar selection and production practices are the most important strategies under the grower's control. In recent years, an arsenic-containing preparation called "Tianmisu", with the main ingredient of asomate, has occasionally been reported to be used in citrus cultivation to improve the sweetness of fruits. In order to reveal the effects of the pesticide on citrus fruits, 'Harumi' tangor was treated with "Tianmisu", and the impact of this pesticide on fruit quality and metabolites was investigated through UPLC-Q-TOF/MS-based metabolomic analysis. Compared with the control, the concentration of titratable acidity, in particular citric acid, in the pulp of 'Harumi' tangor treated with the pesticide, was significantly reduced by 60.5%. The differences in metabolites between the pesticide-treated samples and the control were illustrated by Principal Component Analysis (PCA) and Partial Least Squares Discriminant Analysis (PLS-DA). The PLS-DA analysis demonstrated a clear discrimination, with R2Y and Q2 values of 0.982 and 0.933 in the positive mode and 0.984 and 0.900 in the negative mode, respectively. A total of 155 compounds were identified, and 63 characteristic components were screened out from the pesticide-treated samples compared to the control. Aside from the upregulation observed for a few metabolites, the majority of the compounds, including citric acid and various lipids, were down-regulated in the treated citrus fruits compared to the control. This study can serve as a basis for understanding the regulatory mechanism of organic acids in citrus and will be helpful in developing different strategies to improve citrus quality.

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