文献类型：期刊文献

英文题名：SmMYB2 promotes salvianolic acid biosynthesis in the medicinal herb Salvia miltiorrhiza

作者：Deng, Changping[1,2];Wang, Yao[1,3];Huang, Fenfen[3];Lu, Sunjie[1];Zhao, Limei[1];Ma, Xingyuan[2];Kai, Guoyin[1,3]

机构：[1]Zhejiang Chinese Med Univ, Coll Pharm, Lab Med Plant Biotechnol, Hangzhou 310053, Peoples R China;[2]East China Univ Sci & Technol, Sch Biotechnol, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China;[3]Shanghai Normal Univ, Sch Life Sci, Inst Plant Biotechnol, Shanghai 200234, Peoples R China

年份：2020

卷号：62

期号：11

起止页码：1688

外文期刊名：JOURNAL OF INTEGRATIVE PLANT BIOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000537124400001)】；

基金：This work was supported by National Natural Science Fund of China (81522049, 31571735, 31270007, 30900110), the "Dawn" Program of Shanghai Education Commission (16SG38), Shanghai Science and Technology Committee Project (17JC1404300, 15430502700), Zhejiang Provincial Wanren Program for Leading Talents of Science and Technology Innovation (2018R52050), Zhejiang Provincial Program for the Cultivation of High-level Innovative Health talents (2018-62-3), New Century Talent Project (NECT-13-0902), Opening Project of Zhejiang Provincial Preponderant and Characteristic Subject of Key University (Traditional Chinese Pharmacology), Zhejiang Chinese Medical University (ZYAOX2018019).

语种：英文

外文关键词：anthocyanin; rosmarinic acid; salvianolic acid B; Salvia miltiorrhiza; SmMYB2

摘要：MYB transcription factors play vital roles in plant growth and metabolism. The phytohormone methyl jasmonate (MeJA) promotes phenolic acid accumulation in the medicinal herb Salvia miltiorrhiza, but the regulatory mechanism is poorly understood. Here, we identified the MeJA-responsive R2R3-MYB transcription factor gene SmMYB2 from a transcriptome library produced from MeJA-treated S. miltiorrhiza hairy roots. SmMYB2 expression was tightly correlated with the expression of key salvianolic acid biosynthetic genes including CYP98A14. SmMYB2 was highly expressed in the periderm of S. miltiorrhiza and SmMYB2 localized to the nucleus. Overexpressing SmMYB2 in S. miltiorrhiza hairy roots significantly increased the levels of salvianolic acids (including rosmarinic acid and salvianolic acid B) by upregulating salvianolic acid biosynthetic genes such as CYP98A14. SmMYB2 binds to the MYB-binding motifs in the promoter of CYP98A14, as confirmed by a dual-luciferase assay and electrophoretic mobility shift assays. Anthocyanin contents were significantly higher in SmMYB2-overexpressing hairy root lines than the control, primarily due to the increased expression of CHI, DFR, and ANS. These findings reveal the novel regulatory role of SmMYB2 in MeJA-mediated phenolic acid biosynthesis, providing a useful target gene for metabolic engineering and shedding light on the salvianolic acid regulatory network.