Abstract
A novel selection system for plant genetic transformation was developed based on the enzyme tryptophan decarboxylase (TDC; EC 4.1.1.28) from Catharanthus roseus. This enzyme converts the toxic tryptophan analogue 4-methyl tryptophan (4-mT) into the non-toxic compound 4-methyl tryptamine. Expression of tdc in transgenic plants that have no endogenous TDC-activity allows selection on 4-mT. A vector was constructed containing a tdc cDNA clone under control of the constitutively expressed cauliflower mosaic virus 35S promoter. This vector was used in Agrobacterium-mediated tobacco leaf disc transformation experiments. The optimal concentration for selection with 4-mT was found to be 0.1 mM. The transformed nature of shoots obtained after tdc gene transfer and subsequent selection on 0.1 mM 4-mT was confirmed by northern blot analysis.
References
Berlin J, Mollenschott C, Sasse F, Witte L, Piehl W, Buntemeyer H: Restoration of serotonin biosynthesis in cell suspension cultures of Peganum harmala by selection for 4-methyltryptophan-tolerant cell lines. J Plant Physiol 131: 225–236 (1987).
Bevan M: Binary Agrobacterium vector for plant transformation. Nucl Acids Res 12: 8711–8721 (1984).
Everett NP, Robinson KEP, Mascarenhas D: Genetic engineering of sunflower (Helianthus annuus L.). Biol technology 5: 1201–1204 (1987).
Goddijn OJM, deKam RJ, Zanetti A, Schilperoort RA, Hoge JHC: Auxin rapidly down-regulates transcription of the tryptophan decarboxylase gene from Catharanthus roseus. Plant Mol Biol 18: 1113–1120 (1992).
Goddijn OJM: Regulation of terpenoid indole alkaloid biosynthesis in Catharanthus roseus: the tryptophan decarboxylase gene. Ph.D. thesis, Leiden University (1992).
Hoekema A, Hirsch PR, Hooykaas PJJ, Schilperoort RA: A binary plant vector strategy based on the separation of vir-and T-region of the Agrobacterium tumefaciens Tiplasmid. Nature 303: 179–180 (1983).
Horsch RB, Fraley RT, Rogers SG, Sanders PR, Lloyd A, Hoffmann N: A simple and general method of transferring genes into plants. Science 223: 496–498 (1984).
Marsch JL, Erfle M, Wykes EJ: The pIC plasmid and phage vectors with versatile cloning sites for recombinant selection by insertional inactivation. Gene 32: 481–485 (1984).
Mattonovich D, Ruker F, daCamara Machado A, Laimer M, Regner F, Steinkellner H, Himmler G, Katinger H: Efficient electroporation of Agrobacterium spp. by electroporation. Nucl Acids Res 17: 6747 (1989).
Murashige T, Skoog F: A revised medium for rapid growth and bioassay with tobacco tissue cultures. Physiol Plant 15: 473–497 (1962).
Noé W, Mollenschott C, Berlin J: Tryptophan decarboxylase from Catharanthus roseus cell suspension cultures: purification molecular and kinetic data of the homogenous protein. Plant Mol Biol 3: 281–288 (1984).
Pennings EJM, Hegger I, van derHeyden R, Duine JA, Verpoorte R: Assay of tryptophan decarboxylase from Catharanthus roseus plant cell cultures by HPLC. Anal Biochem 165: 133–136 (1987).
Pietrzak M, Shillito D, Hohn T, Potrykus I: Expression in plants of two bacterial antibiotic resistance genes after protoplast transformation with a new plant expression vector. Nucl Acids Res 14: 5857–5868 (1986).
Sasse F, Buchholz M, Berlin J: Site of action of growth inhibitory tryptophan analogues in Catharanthus roseus cell suspension cultures. Z Naturforsch 38c: 910–915 (1983).
Songstad DD, DeLuca V, Brisson N, Kurz WGW, Nessler CL: High levels of tryptamine accumulation in transgenic tobacco expressing tryptophan decarboxylase. Plant Physiol 94: 1410–1413 (1990).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Goddijn, O.J.M., van der Duyn Schouten, P.M., Schilperoort, R.A. et al. A chimaeric tryptophan decarboxylase gene as a novel selectable marker in plant cells. Plant Mol Biol 22, 907–912 (1993). https://doi.org/10.1007/BF00027376
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00027376