Journal
FOOD RESEARCH INTERNATIONAL
Volume 151, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.foodres.2021.110850
Keywords
Metabolome profiling; Sesame; Seed coat color; LC-MS; MS; Antioxidant activity
Categories
Funding
- Natural Science Foundation of Hubei Province, China [2019CFB574]
- Agricultural Science and Technol-ogy Innovation Project of the Chinese Academy of Agricultural Sciences [CAAS-ASTIP-2016-OCRI]
- China Agriculture Research System [CARS-14]
- Science and Technology Innovation Project of Hubei province [201620000001048]
- Key Research Projects of Hubei province [2020BBA045]
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The study showed significant variations in metabolites among sesame seeds of different colors, with higher levels of flavonoids, amino acids, and terpenoids in black seeds. The antioxidant activities of the seeds were found to increase with the darkness of the seed coat.
Sesame seeds are considered worldwide as a functional food due to their nutritional and therapeutical values. Several physiological functions are being associated with sesame seeds and their derived products. However, the phytochemicals responsible for these various proprieties are not well understood. Thus, to acknowledge the diversity and variability of metabolites in sesame seeds of different colors and reveal key metabolites and pathways contributing to differences in antioxidant activities, black, brown, yellow, and white sesame seeds from 12 varieties were subjected to LC-MS/MS-based widely targeted metabolomics analysis. Totally, 671 metabolites were identified and chemically classified. The metabolic compounds varied significantly with the seed coat color and genotype. Many flavonoids, amino acids, and terpenoids were up-regulated in dark seeds. Sixty key differential metabolites were filtered out. Phenylpropanoid biosynthesis, amino acids biosynthesis, and tyrosine metabolism were the main differently regulated pathways. The DPPH, ABTS, and FRAP assays showed that the antioxidant activities of the seeds increased with the seed coat darkness. Therefore, the pharmacological proprieties of black seeds might be related to their high content of flavonoids and essential amino acids mostly. These findings expand phytochemicals composition information of different colored sesame seeds and provide resources for their comprehensive use and quality improvement.
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