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Enhanced morphinan alkaloid production in hairy root cultures of Papaver bracteatum by over-expression of salutaridinol 7-o-acetyltransferase gene via Agrobacterium rhizogenes mediated transformation

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Abstract

Papaver bracteatum is an important medicinal plant valued for its high content of thebaine and an alternative to P. somniferum for benzylisoquinoline alkaloid production. Salutaridinol 7-o-acetyltransferase (SalAT) is a key gene in morphinan alkaloids biosynthesis pathway. Over expression of SalAT gene was used for metabolic engineering in P. bracteatum hairy root cultures. Transcript level of the salutaridinol 7-o-acetyltransferase gene in transgenic hairy root lines increased up to 154 and 128 % in comparison with hairy roots without SalAT over expression and wild type roots, respectively. High performance liquid chromatography analysis showed that the transgenic hairy roots relatively improved levels of thebaine (1.28 % dry weight), codeine (0.02 % dry weight) and morphine (0.03 % dry weight) compared to those hairy roots without SalAT over expression. This suggests that P. bracteatum hairy roots expressing the SalAT gene could be potentially used for the production of valuable morphinan alkaloids.

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Acknowledgments

The authors thank to Dr. Houshang Ghasemi and Mr. Saeed Dini (TEMAD Co.) for providing HPLC services.

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Correspondence to Haleh Hashemi Sohi or Amir Mousavi.

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Sharafi, A., Hashemi Sohi, H., Mousavi, A. et al. Enhanced morphinan alkaloid production in hairy root cultures of Papaver bracteatum by over-expression of salutaridinol 7-o-acetyltransferase gene via Agrobacterium rhizogenes mediated transformation. World J Microbiol Biotechnol 29, 2125–2131 (2013). https://doi.org/10.1007/s11274-013-1377-2

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