D-Lactate dehydrogenase as a marker gene allows positive selection of transgenic plants |
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Authors: | Wienstroer Judith Engqvist Martin K M Kunz Hans-Henning Flügge Ulf-Ingo Maurino Veronica G |
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Institution: | 1. Entwicklungs- und Molekularbiologie der Pflanzen, Heinrich-Heine-Universität, Universitätsstraße 1, 40225 Düsseldorf, Germany;2. Botanisches Institut, Biozentrum Köln, Universität zu Köln, Zülpicher Str. 47b, 50674 Cologne, Germany |
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Abstract: | D-Lactate negatively affects Arabidopsis thaliana seedling development in a concentration-dependent manner. At media D-lactate concentrations greater than 5-10mM the development of wild-type plants is arrested shortly after germination whereas plants overexpressing the endogenous D-lactate dehydrogenase (D-LDH) detoxify D-lactate to pyruvate and survive. When the transgenic plants are further transferred to normal growth conditions they develop indistinguishably from the wild type. Thus, D-LDH was successfully established as a new marker in A. thaliana allowing selecting transgenic plants shortly after germination. The selection on D-lactate containing media adds a new optional marker system, which is especially useful if the simultaneous selection of multiple constructs is desired. |
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