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2,4-Epibrassinolide Regulates Polysaccharide Substance Biosynthesis after Field Application to Dendrobium officinale

文献类型： 外文期刊

作者： Lu, Lanfei 1 ; Ye, Hui 1 ; Fang, Nan 1 ; Jiang, Jinhua 1 ; Luo, Yuqin 1 ; Wang, Xiangyun 1 ; He, Hongmei 1 ; Yu, Jianzhong 1 ; Zhao, Xueping 1 ; Zhang, Changpeng 1 ;

作者机构： 1.Zhejiang Acad Agr Sci, Inst Agroprod Safety & Nutr, State Key Lab Managing Biot & Chem Threats Qual &, Key Lab Pesticide Residue Detect,Minist Agr & Rura, Hangzhou 310021, Peoples R China

关键词： Dendrobium officinale; 2,4-epibrassinolide; residue; polysaccharide; differential metabolites

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：6.2； 五年影响因子：6.4 ）

ISSN： 0021-8561

年卷期： 2025 年 73 卷 10 期

页码：

收录情况： SCI

摘要： This study investigated the effects of 2,4-epibrassinolide (EBR) residues on Dendrobium officinale quality. The residues decreased from 0.164 to 0.238 mg/kg (2 h) to 0.014-0.071 mg/kg (35 d) in the stems with 0.02-0.05 mg/L EBR applications. Polysaccharide, mannose, and glucose content were increased in the stems and leaves, reaching a maximum of 61% in dried stems on 35 d. The increase in content may result from the significant upregulation of enzyme activities, including UGP, SUS, and SPS. Further analysis by nontargeted metabolomics revealed 5 upregulated (UDP-l-rhamnose, mannose-6-phosphate, GDP-mannose, chitobiose, and N-acetyl-galactosamine-6-phosphate) and 13 downregulated metabolites associated with polysaccharide and monosaccharide growth in the 0.02-0.05 mg/L EBR treatments. These differential metabolites regulate the biosynthesis of polysaccharides mainly through key metabolic pathways, such as glucose and fructose metabolism. These results provide a reference for the regulatory mechanisms governing the quality indicators of Dendrobium officinale after EBR application.

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