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Lv Z, Wang Y, Liu Y, Peng B, Zhang L, Tang K, Chen W. The SPB-Box Transcription Factor AaSPL2 Positively Regulates Artemisinin Biosynthesis in Artemisia annua L. FRONTIERS IN PLANT SCIENCE 2019; 10:409. [PMID: 31024586 PMCID: PMC6465324 DOI: 10.3389/fpls.2019.00409] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Accepted: 03/19/2019] [Indexed: 05/11/2023]
Abstract
Artemisinin, an important compound produced by Artemisia annua, is the active ingredient in the treatment of malaria. Jasmonic acid, one of the phytohormones, is an important elicitor of artemisinin biosynthesis by enhancing transcription levels of transcription factors. SPL transcription factors are plant-specific transcription factors of plant growth, development, and secondary metabolism regulation. However, to date, the SPL transcription factors that regulate artemisinin biosynthesis is currently unclear. Here, we show that an SPL transcription factor can positively regulate artemisinin biosynthesis by binding to the promoter of artemisinin biosynthetic pathway genes. We screened AaSPL2 by gene expression profiles analysis in 14 SPL transcription factors. We demonstrated that AaSPL2 can activate the promoter of DBR2 by dual-LUC assy. Moreover, in the AaSPL2 overexpression plants, the artemisinin content was increased by 33-86%, and in the AaSPL2 -RNAi transgenic plants, artemisinin content was decreased by 33-65%. These data suggest that AaSPL2 and DBR2 interact with a "GTAC" cis-element in the DBR2 promoter, mediating the transcriptional activation of DBR2 in response to JA and resulting in the improvement on artemisinin content.
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Affiliation(s)
- Zongyou Lv
- Department of Pharmacy, Changzheng Hospital, Second Military Medical University, Shanghai, China
- Research and Development Center of Chinese Medicine Resources and Biotechnology, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yun Wang
- Department of Pharmacy, Changzheng Hospital, Second Military Medical University, Shanghai, China
| | - Yan Liu
- Department of Pharmacy, Changzheng Hospital, Second Military Medical University, Shanghai, China
- Department of Pharmacy, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Bowen Peng
- Joint International Research Laboratory of Metabolic and Developmental Sciences, Key Laboratory of Urban Agriculture (South) Ministry of Agriculture, Plant Biotechnology Research Center, Fudan-SJTU-Nottingham Plant Biotechnology R&D Center, Shanghai Jiao Tong University, Shanghai, China
| | - Lei Zhang
- Department of Pharmaceutical Botany, School of Pharmacy, Second Military Medical University, Shanghai, China
- *Correspondence: Lei Zhang, Kexuan Tang, Wansheng Chen,
| | - Kexuan Tang
- Joint International Research Laboratory of Metabolic and Developmental Sciences, Key Laboratory of Urban Agriculture (South) Ministry of Agriculture, Plant Biotechnology Research Center, Fudan-SJTU-Nottingham Plant Biotechnology R&D Center, Shanghai Jiao Tong University, Shanghai, China
- *Correspondence: Lei Zhang, Kexuan Tang, Wansheng Chen,
| | - Wansheng Chen
- Department of Pharmacy, Changzheng Hospital, Second Military Medical University, Shanghai, China
- Research and Development Center of Chinese Medicine Resources and Biotechnology, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- *Correspondence: Lei Zhang, Kexuan Tang, Wansheng Chen,
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