Abstract
Hyoscyamine biosynthesis in Datura stramonium hairy roots with different ploidy levels was investigated. For the first time, we report that hairy roots undergo endoreduplication and therefore consist mainly of cells with doupled sets of chromosomes of primary plant tissues, used for Agrobacterium transformation. The alkaloid profiles of hairy roots obtained from diploid and tetraploid plants were similar in terms of the major compounds, but they differed significantly with respect to the minor compounds (here defined as those that accounted for <1% of the total ion current of the alkaloid mixture in gas chromatography–mass spectrometric analyses). Significant differences in the effects of the main nutrients on the growth of the hairy roots obtained from diploid and tetraploid plants and their hyoscyamine contents were observed. The maximal yield of hyoscyamine (177 mg/L) was obtained when hairy roots from tetraploid plants were cultivated in Murashige–Skoog nutrient medium supplemented with 6% sucrose. Time courses of utilization of the main nutrients in the medium during cultivation of D. stramonium hairy root cultures are also presented.
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Acknowledgement
This research was supported by a Marie Curie Fellowship of the European Community program “Development Host Fellowships” under contract number HPMD-CT-2001-00092, DAAD, references number D/05/01303, and the Bulgarian Science Fund.
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Pavlov, A., Berkov, S., Weber, J. et al. Hyoscyamine Biosynthesis in Datura stramonium Hairy Root In Vitro Systems with Different Ploidy Levels. Appl Biochem Biotechnol 157, 210–225 (2009). https://doi.org/10.1007/s12010-008-8264-6
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DOI: https://doi.org/10.1007/s12010-008-8264-6