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Budding mutation reprogrammed flavonoid biosynthesis in jujube by deploying MYB41 and bHLH93

文献类型： 外文期刊

作者： Jin, Juan 1 ; Li, Lili 1 ; Fan, Dingyu 1 ; Du, Youwei 2 ; Jia, Hongchen 2 ; Yang, Lei 1 ; Jia, Wensuo 4 ; Hao, Qing 1 ;

作者机构： 1.Xinjiang Acad Agr Sci, Inst Hort Crops, State Key Lab Genet Improvement & Germplasm Innova, Key Lab Genome Res & Genet Improvement Xinjiang Ch, Urumqi 830091, Peoples R China

2.Northwest A&F Univ, State Key Lab Crop Stress Biol Arid Areas, Yangling 712100, Shaanxi, Peoples R China

3.Northwest A&F Univ, Coll Plant Protect, Yangling 712100, Shaanxi, Peoples R China

4.China Agr Univ, Coll Hort, Beijing 100193, Peoples R China

5.Xinjiang Acad Agr Sci, Inst Hort Crops, 403 Nanchang Rd, Urumqi 830091, Xinjiang, Peoples R China

6.China Agr Univ, 2 Yuanmingyuan West Rd, Beijing 100193, Peoples R China

关键词： Jujube; Budding mutation; Muti-omics; Flavonoids; MYB41; bHLH93

期刊名称：PLANT PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：6.5； 五年影响因子：6.4 ）

ISSN： 0981-9428

年卷期： 2024 年 211 卷

页码：

收录情况： SCI

摘要： Budding mutations are known to cause metabolic changes in new jujube varieties; however, the mechanisms underlying these changes are still unclear. Here, we performed muti-omics analysis to decipher the detailed metabolic landscape of "Saimisu 1" (S1) and its budding mutation line "Saimisu 2" (S2) at all fruit stages. We found that the genes involved in the biosyntheses of flavonoids, phenylpropanoids, and amino acids were upregulated in S2 fruits at all stages, especially PAL and DFR, resulting in increased accumulation of related compounds in S2 mature fruits. Further co-expression regulatory network analysis showed that the transcription factors MYB41 and bHLH93 potentially regulated the expression of PAL and DFR, respectively, by directly binding to their promoters. Moreover, the overexpression of MYB41 or bHLH93 induced their expression levels to redirect the flux of the flavonoid biosynthetic pathway, eventually leading to high levels of related compounds in S2 fruits. Overall, this study revealed the metabolic variations between S1 and S2 and contributed to the understanding of the mechanisms underlying budding mutation-mediated metabolic variations in plants, eventually providing the basis for breeding excellent jujube varieties using budding mutation lines.

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