4.6 Article

Molecular mechanisms of flavonoid accumulation in germinating common bean (Phaseolus vulgaris) under salt stress

期刊

FRONTIERS IN NUTRITION
卷 9, 期 -, 页码 -

出版社

FRONTIERS MEDIA SA
DOI: 10.3389/fnut.2022.928805

关键词

flavonoids (rutin) content; common bean; germinating; salt stress; mechanism; phenylpropanoid biosynthesis; flavonoid biosynthesis

资金

  1. National Key Research and Development Program [2020YFD1001402]
  2. Research Project of Heilongjiang Bayi Agricultural University [XDB2011-02]
  3. Special Funds from the Central Finance

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Salt stress significantly affects the accumulation of rutin content in germinating beans by regulating phenylpropanoid and flavonoid biosynthesis pathways and related enzyme activities.
Flavonoids are important secondary metabolites, active biomolecules in germinating beans, and have prominent applications in food and medicine due to their antioxidant effects. Rutin is a plant flavonoid with a wide biological activity range. In this study, flavonoid (rutin) accumulation and its related molecular mechanisms in germinating common bean (Phaseolus vulgaris) were observed at different time points (0-120 h) under salt stress (NaCl). The rutin content increased from germination onset until 96 h, after which a reducing trend was observed. Metabolome analysis showed that salt stress alters flavonoid content by regulating phenylpropanoid (ko00940) and flavonoid (ko00941) biosynthesis pathways, as well as their enzyme activities, including cinnamyl-alcohol dehydrogenase (CAD), peroxidase (POD), chalcone isomerase (CHI), and flavonol synthase (FLS). The RNA-seq and quantitative real-time PCR (qRT-PCR) analyses also showed that these two pathways were linked to changes in flavonoid content following salt treatment. These results reveal that salt stress effectively enhanced rutin content accumulation in germinating beans, hence it could be employed to enhance the functional quality of germinating common beans.

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