Acta Agriculturae Zhejiangensis ›› 2023, Vol. 35 ›› Issue (6): 1253-1264.DOI: 10.3969/j.issn.1004-1524.2023.06.03

• Crop Science • Previous Articles     Next Articles

Cloning and functional research of MYB transcription factor AsMYB44 from Angelica sinensis

LIU Guangrui1,2(), ZONG Yuan2, LI Yun2, CAO Dong2, LIU Baolong2, BAO Xuemei1,2,3, LI Jianmin1,*()   

  1. 1. School of Life Sciences, Qinghai Normal University, Xining 810008, China
    2. Qinghai Provincial Key Laboratory of Crop Molecular Breeding, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, China
    3. CAS Key Laboratory of Tibetan Medicine Research, Xining 810008, China
  • Received:2022-07-02 Online:2023-06-25 Published:2023-07-04

Abstract:

In order to study the mechanism of biosynthetic regulation of Angelica sinensis phenolic acids, a MYB transcription factor AsMYB44 gene was cloned from Angelica sinensis and the relevant bioinformatics analysis of the sequence was carried out using biological software. The Agrobacterium tumefaciens-mediated genetic transformation system was overexpressed in Samsun tobacco, and a multi-omics combined analysis of the transgenic tobacco was performed. The CDS (coding sequence) of the AsMYB44 was 903 bp, encoding 300 amino acids, and with the complete SANT and MYB domains. Phylogenetic analysis showed that AsMYB44 had higher homology with Arabidopsis thaliana AtMYB11 (AF062863.1), AtMYB12 (AF062864.1) and Salvia miltiorrhiza SmMYB97 (KF059561.1). The results of transcriptome sequencing showed that the differentially expressed genes were mostly enriched in the phenylpropane synthesis and metabolism pathway in AsMYB44 transgenic tobacco. Expression levels of phenylalanine ammonia lyase gene (PAL), cinnamic acid-4-hydroxyl (C4H), 4-coumaric acid: coenzyme A ligase gene (4CL), caffeic acid 3-O-methyltransferase gene (COMT), cinnamyl alcohol dehydrogenase gene (CAD) and other structural genes were upregulated. Metabolomic analysis showed that the contents of metabolites such as phenolic acids, lipids, alkaloids, flavonoids and other compounds in transgenic tobacco changed significantly. These results indicated that the AsMYB44 transcription factor could positively regulate the metabolic synthesis of phenolic acids, which provided a theoretical basis for the biosynthesis mechanism of phenolic acid secondary metabolites in Angelica sinensis.

Key words: Angelica sinensis, AsMYB44 transcription factor, gene cloning, transgenic tobacco, multi-omics analysis, phenolic acid

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