Metabolomics revealed the enrichment of nutritional components in purple rice grains exposed to different selenium concentrations

IF 3.7 2区农林科学 Q2 FOOD SCIENCE & TECHNOLOGY

Journal of Cereal Science Pub Date : 2025-07-25 DOI:10.1016/j.jcs.2025.104249

Qiangqiang Xiong , Han Wu , Yuehong Peng , Mengyun Du , Haihua Luo

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Abstract

Exogenous selenium (Se) affects the nutritional composition and metabolites of purple rice grains. This study integrated untargeted and targeted metabolomics analysis to investigate the effects of foliar spraying of different concentrations of exogenous selenium (0, 10, 20, and 40 mg L⁻¹) on the nutritional components and metabolites of purple rice grains during the early stage of grain filling. With the gradual increase in the exogenous Se concentration, the contents of Se and physiologically active substances in purple rice grains increased with growth. At the same time, the contents of the main nutritional components, amino acids, and total antioxidant capacity tended to first increase but then decrease. Exogenous Se enhances amino acid synthesis at low concentrations but inhibits it at high concentrations. This study identified 10 mg L⁻¹ as the threshold Se concentration for synergistically increasing the contents of Se, nutritional components, and physiological substances in purple rice grains.

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代谢组学揭示了不同硒浓度下紫稻籽粒营养成分的富集

外源硒对紫稻籽粒营养成分和代谢产物的影响。本研究结合非靶向和靶向代谢组学分析，研究了灌浆前期叶面喷施不同浓度外源硒（0、10、20和40 mg L−1）对紫稻籽粒营养成分和代谢物的影响。随着外源硒浓度的逐渐增加，紫稻籽粒中硒和生理活性物质含量随生长而增加。同时，主要营养成分、氨基酸含量和总抗氧化能力均呈现先升高后降低的趋势。外源硒在低浓度下促进氨基酸合成，而在高浓度下则抑制氨基酸合成。本研究确定以10 mg L−1硒浓度为阈值，可协同提高紫稻籽粒硒、营养成分和生理物质的含量。

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来源期刊

Journal of Cereal Science 工程技术-食品科技

CiteScore

7.80

自引率

2.60%

发文量

163

审稿时长

38 days

期刊介绍： The Journal of Cereal Science was established in 1983 to provide an International forum for the publication of original research papers of high standing covering all aspects of cereal science related to the functional and nutritional quality of cereal grains (true cereals - members of the Poaceae family and starchy pseudocereals - members of the Amaranthaceae, Chenopodiaceae and Polygonaceae families) and their products, in relation to the cereals used. The journal also publishes concise and critical review articles appraising the status and future directions of specific areas of cereal science and short communications that present news of important advances in research. The journal aims at topicality and at providing comprehensive coverage of progress in the field.