Abstract
Axenically grown Saussurea medusa plantlets were inoculated with four Agrobacterium rhizogenes strains, and hairy root lines were established with A. rhizogenes strain R1601 in N6 medium. PCR and Southern hybridization confirmed integration of the T-DNA fragment of the Ri plasmid from A. rhizogenes into the genome of S. medusa hairy roots. In N6 medium, maximum biomass of the hairy root cultures was achieved [8 g (dry weight) per liter; growth ratio 35-fold] after 21 days of culture. The amount of jaceosidin extracted from the hairy root cultures was 46 mg/l (production ratio of 37-fold) after 27 days of culture. The maximum jaceosidin content obtained using N6 medium was higher than that obtained with Modified White, MS or B5 medium. In N6 medium, the tip segments were more efficient for hairy root growth and jaceosidin production than the middle and basal regions of the root.
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Abbreviations
- AS:
-
Acetosyringone
- BA:
-
Benzyladenine
- cef:
-
Cefotaxime sodium
- DW:
-
Dry weight
- FW:
-
Fresh weight
- HPLC:
-
High-performance liquid chromatography
- IAA:
-
Indole-3-acetic acid
- km:
-
Kanamycin
- NAA:
-
α-Naphthaleneacetic acid
- SDS:
-
Sodium dodecyl sulfate
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Acknowledgements
We thank Prof. Zhong-ping Lin, National Laboratory of Protein Engineering and Genetic Engineering of Plants, Peking University, Beijing, and Prof. Min Sun, Center for Agricultural Biotechnology, Southwest Agricultural University, Chongqing, for providing the Agrobacterium rhizogenes strains. We thank Prof. Zhong-Jian Jia, Department of Chemistry, Lanzhou University, Lanzhou, and Dr. Jing-yuan Song, Institute of Medicinal Plants, Chinese Academy of Medical Sciences, Beijing, for the generous gifts of standard samples of jaceosidin and mannopine. This investigation was supported by the National Science Foundation of China (No. 39970896).
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Communicated by K.K. Kamo
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Zhao, D., Fu, C., Chen, Y. et al. Transformation of Saussurea medusa for hairy roots and jaceosidin production. Plant Cell Rep 23, 468–474 (2004). https://doi.org/10.1007/s00299-004-0840-9
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DOI: https://doi.org/10.1007/s00299-004-0840-9