Abstract
To develop an optimal bioprocess for the production of tanshinone which is mainly used for the treatment of cardiocerebral vascular disease, the tanshinone biosynthetic pathway regulation must be better understood. In this paper, expression of tanshinone biosynthetic pathway related genes as well as tanshinone accumulation in Salvia miltiorrhiza hairy root cultures were investigated, in response to biotic and abiotic elicitors, respectively. Our results showed tanshinone accumulation in S. miltiorrhiza hairy roots was highly regulated by the coordination of the expression of several genes involved in tanshinone biosynthesis pathway. Our results showed a positive correlation between gene expression and tanshinone accumulation, suggesting that tanshinone accumulation may be the result of the coexpression up-regulation of several genes involved in tanshinone biosynthesis under the treatment of various elicitors. Meantime, SmHMGR, SmDXS2, SmFPPS, SmGGPPS and SmCPS were identified as the potential key enzymes in the pathway for targeted metabolic engineering to increase accumulation of tanshinone in S. miltiorrhiza hairy roots. This is the first report integrating comprehensively the transcript and metabolite biosynthesis of tanshinone in S. miltiorrhiza hairy roots.
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Abbreviations
- T2A:
-
Tanshinone IIA
- CT:
-
Cryptotanshinone
- BABA:
-
β-Aminobutyric acid
- MJ:
-
Methyl jasmonate
- YE:
-
Yeast extract
- fw:
-
Fresh weight
- SA:
-
Salicylic acid
- DW:
-
Dry weight
- RT:
-
Reverse transcriptase
- AACT:
-
Acetyl-CoA C-acetyltransferase
- HMGS:
-
3-Hydroxy-3-methylglutaryl-CoA synthase
- HMGR:
-
3-Hydroxy-3-methylglutaryl-CoA reductase
- MK:
-
Mevalonate kinase
- PMK:
-
5-Phosphomevalonate kinase
- MDC:
-
Mevalonate 5-diphosphate decarboxylase
- DXS:
-
1-Deoxy-d-xylulose-5-phosphate synthase
- DXR:
-
1-Deoxy-d-xylulose-5-phosphate reductoisomerase
- MCT:
-
2-C-methyl-d-erythritol-4-phosphate cytidyl transferase
- CMK:
-
4-(cytidine 5-diphospho)-2-C-methyl-d-erythritol kinase
- MECPS:
-
2-C-methylerythritol 2,4-cyclodiphosphate synthase
- HDS:
-
1-Hydroxy-2-methyl-2-(E)-butenyl-4-diphosphate synthase
- HDR:
-
1-Hydroxy-2-methyl-2-(E)-butenyl-4-diphosphate reductase
- IPPI:
-
Isopentenyl-diphosphate delta-isomerase
- GPPS:
-
Geranyl diphosphate synthase
- FPPS:
-
Farnesyl diphosphate synthase
- GGPPS:
-
Geranylgeranyl diphosphate synthase
- CPS:
-
Copalyl diphosphate synthase
- KSL:
-
Kaurene synthase-like
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Acknowledgments
This work was supported by National Natural Science Fund (30900110), Shanghai Science and Technology Committee Project (10JC1412000, 09QH1401900, 06QA14038, 08391911800, 073158202, 075405117, 065458022, 05ZR14093), Project from Ministry of Science and Technology of China (NC2010AE0075, NC2010AE0372), Zhejiang Provincial Natural Science Fund (Y2080621), Shanghai Education Committee Fund (09ZZ138, 06DZ015, J50401), Fujian Science and Technology Committee Key Special Project (2008NZ0001-4), National Transgenic Organism New Variety Culture Key Project (2009ZX08012-002B), Project from Shanghai Normal University (SK201230, SK201236, SK200830). We gratefully thank Kyle Andrew Schneider (University of Dayton, Ohio, USA) for grammatical correction of the manuscript.
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Communicated by B. Borkowska.
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Kai, G., Liao, P., Xu, H. et al. Molecular mechanism of elicitor-induced tanshinone accumulation in Salvia miltiorrhiza hairy root cultures. Acta Physiol Plant 34, 1421–1433 (2012). https://doi.org/10.1007/s11738-012-0940-z
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DOI: https://doi.org/10.1007/s11738-012-0940-z