Abstract
In the present study, metabolic engineering approach was used through over-expressing the Petunia chalcone synthase (chsA) gene in order to enhance the silymarin production level in the hairy root cultures of Silybum marianum. Molecular analysis confirmed the presence and integration of chsA transgene in transgenic hairy roots. Chemical analysis indicated that the over-expression of chsA gene enhanced the silymarin production level in the transgenic line as much as 7-folds than the non-transgenic hairy roots. Moreover, the silybin content, the main active component of silymarin, was proved to be 10 times higher in transgenic hairy roots than those of the non-transgenic ones. Therefore, the over-expression of petunia chsA gene in S. marianum hairy roots did not result in gene silencing, but led to an enhanced biosynthesis of the flavonolignans.
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Abbreviations
- chsA:
-
Chalcone synthase
- SB:
-
Silybin
- ISB:
-
Isosilybin
- SD:
-
Silydianin
- SC:
-
Silychristin
- TXF:
-
Taxifolin
- CoA:
-
Coenzyme A
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This research was founded (No. 12-05-05-8702-88005) by the Agricultural Biotechnology Research Institute of Iran (ABRII)
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Rahnama, H., Razi, Z., Dadgar, M.N. et al. Enhanced production of flavonolignans in hairy root cultures of Silybum marianum by over-expression of chalcone synthase gene. J. Plant Biochem. Biotechnol. 22, 138–143 (2013). https://doi.org/10.1007/s13562-012-0122-5
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DOI: https://doi.org/10.1007/s13562-012-0122-5