Journal
FRONTIERS IN PLANT SCIENCE
Volume 13, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fpls.2022.943740
Keywords
alfalfa sprouts; transcriptomic analysis; metabolomic analysis; isoflavonoid biosynthesis; light exposure
Categories
Funding
- National Natural Science Foundation of China
- Start Up Funds for High Level Talents of Qingdao Agricultural University
- First Class Grassland Science Discipline Program of Shandong Province, China
- [31972958]
- [663-1120001]
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In this study, metabolomic and transcriptomic analyses were used to compare the nutrient composition of yellow and green alfalfa sprouts during germination. The results showed that green alfalfa sprouts contained a wide variety of lipids, flavonoids, phenolic acids, and terpenoids, while yellow alfalfa sprouts contained relatively more isoquercitrin.
Alfalfa sprouts are among the most nutritionally rich foods, and light exposure is a critical factor in determining their biomass and quality. However, detailed metabolic and molecular differences between yellow and green alfalfa sprouts remain unclear. In this study, comprehensive metabolomic and transcriptomic analyses were integrated to evaluate the nutrient composition of alfalfa sprouts during germination with or without light exposure. Differentially expressed genes and differentially accumulated metabolites in green and yellow alfalfa sprouts were significantly enriched in secondary metabolic pathways, such as the isoflavonoid biosynthesis pathway. Green alfalfa sprouts contained a wide variety of lipids, flavonoids, phenolic acids, and terpenoids, among which the top three upregulated were calycosin, methyl gallate, and epicatechin 3-gallate, whereas yellow alfalfa sprouts contained relatively more isoquercitrin. These results provide new insights into the nutritional value and composition of alfalfa sprouts under different germination regimes.
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