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Response mechanism of major secondary metabolites of Polygonatum kingianum to selenium nanoparticles

Year: 2024
Type: article
Abstract: Selenium nanoparticles (SeNPs) can be absorbed by plants, thereby affecting plant physiological activity, regulating gene expression, and altering metabolite content. However, the molecular mechanisms by which exogenous selenium affects plant secondary metabolites remain unclear. We exposed Polygonatum kingianum coll.et Hemsl plants to SeNPs at 0, 10, 25, and 50 mg/L concentrations. Joint physiological, metabolomic, and transcriptomic analyses were performed to reveal the response mechanisms of major secondary metabolites of P. kingianum to selenium nanoparticles. The maximum selenium accumulation in plants was observed at 25 mg/L, where the photosynthetic electron transport rate significantly increased, and the carbon-nitrogen ratio significantly decreased. In parallel, the main active components, polysaccharides and saponins, showed a significant increase in content, while flavonoid content decreased. SeNPs affect polysaccharide accumulation mainly through up-regulation of SPS, UGPase, AGPase, UTP, and SUS genes in starch and sucrose metabolic pathways. The accumulation of saponins was affected by upregulating genes in the sesquiterpenoid and triterpenoid biosynthesis pathways, including PAD, ADH, PK, and GS. The accumulation of flavonoids was mainly regulated by metabolic pathways such as flavonoid biosynthesis, isoflavonoid biosynthesis, and the biosynthesis of phenylpropanoids. In summary, this study reveals the key metabolic pathways affected by nanoselenium in the main secondary metabolic products of P. kingianum.
DOI: 10.3389/fpls.2024.1480079
Authors: Xiaolin Wan, Jiehua Wang, Jiaxin Zhang, Hongshi Cui, Lingjun Cui, Qiang Xiao
Language: English
Field: Nursing
Open Access status: gold
Estimated APC paid: $3,295
OpenAlex ID: W4405558743
FWCI: 1.605
Cites: 57
Cited by: 7
Related to: 10