A1 Refereed original research article in a scientific journal
A comprehensive metabolomics analysis of Torreya grandis nuts with the effective de-astringent treatment during the postharvest ripening stage
Authors: Song Lili, Meng Xuecheng, Song Hanbing, Gao Lingling, Gao Yadi, Chen Wenchao, Huan Weiwei, Suo Jinwei, Yu Weiwu, Hu Yuanyuan, Yang Baoru, Zhang Zuying, Wu Jiasheng
Publisher: ELSEVIER SCI LTD
Publication year: 2023
Journal: Food Chemistry
Journal name in source: FOOD CHEMISTRY
Journal acronym: FOOD CHEM
Article number: 133859
Volume: 398
Number of pages: 10
ISSN: 0308-8146
eISSN: 1873-7072
DOI: https://doi.org/10.1016/j.foodchem.2022.133859
Web address : https://doi.org/10.1016/j.foodchem.2022.133859
Astringency removal is important for the quality of Torreya grandis nut and occurs after harvest. Here, we evaluated the effect of NaHCO3 treatment on astringency removal and compared the differential metabolites of the seed coat and kernel using a UHPLC QQQ-MS-based metabolomics approach. The result revealed the nut astringency was primarily enriched in the seed coat with more soluble tannins. The NaHCO3 treatment greatly shortened the de-astringency process, as indicated by a faster conversion of soluble tannins to insoluble tannins and more acetaldehyde production. Besides, a total of 293 metabolites, including 92 phenolic acids and 37 flavonoids, were tentatively characterized in the seed coat. A further comparative analysis of the metabolomics indicated epigallocatechin, gallocatechin, catechin, procyanidin B1, B2, B3 and C1 to be the major metabolites influenced by the NaHCO3 treatment. This study provides new insights regarding the metabolite differences of Torreya grandis nuts processed with different de-astringent treatments.
