期刊
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
卷 19, 期 12, 页码 -出版社
MDPI
DOI: 10.3390/ijms19123788
关键词
SmJMT; transgenic; Salvia miltiorrhiza; overexpression; transcriptome; phenolic acids
资金
- National Natural Science Foundation of China [31670299, 31800259]
- Funds of Jiangxi provincial education department [GJJ170434]
- major Project of Shaanxi Province, China [2017ZDXM-SF-005]
- Shaanxi province traditional Chinese medicine standardized planting base construction project [2013K14-03-01]
- Natural Science Basic Research Plan in Shaanxi Province of China [2018JQ3033]
- Fundamental Research Funds for the Central Universities [GK201806006, GK201302044, 1301031470]
Jasmonic acid (JA) carboxyl methyltransferase (JMT), a key enzyme in jasmonate-regulated plant responses, may be involved in plant defense and development by methylating JA to MeJA, thus influencing the concentrations of MeJA in plant. In this study, we isolated the JMT gene from Salvia miltiorrhiza, an important medicinal plant widely used to treat cardiovascular disease. We present a genetic manipulation strategy to enhance the production of phenolic acids by overexpresion SmJMT in S. miltiorrhiza. Global transcriptomic analysis using RNA sequencing showed that the expression levels of genes involved in the biosynthesis pathway of phenolic acids and MeJA were upregulated in the overexpression lines. In addition, the levels of endogenous MeJA, and the accumulation of rosmarinic acid (RA) and salvianolic acid (Sal B), as well as the concentrations of total phenolics and total flavonoids in transgenic lines, were significantly elevated compared with the untransformed control. Our results demonstrate that overexpression of SmJMT promotes the production of phenolic acids through simultaneously activating genes encoding key enzymes involved in the biosynthesis pathway of phenolic acids and enhancing the endogenous MeJA levels in S. miltiorrhiza.
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