Abstract
The monocot family Lemnaceae (duckweed) is composed of small, edible, aquatic plants. Spirodela oligorrhiza SP is a duckweed with a biomass doubling time of about 2 days under controlled, axenic conditions. Stably transformed Spirodela plants were obtained following co-cultivation of regenerative calli with Agrobacterium tumefaciens. GFP activity was successfully monitored in different subcellular compartments of the plant and correlated with different targeting sequences. Transgenic lines were followed for a period of at least 18 months and more than 180 vegetative doublings (generations). The lines are stable in morphology, growth rate, transgene expression, and activity as measured by DNA–DNA and immunoblot hybridizations, fluorescence activity measurements, and antibiotic resistance. The level of transgene expression is a function of leader sequences rather than transgene copy number. A stable, transgenic, GFP expression level >25% of total soluble protein is demonstrated for the S. oligorrhiza system, making it among the higher expressing systems for nuclear transformation in a higher plant.
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Abbreviations
- 2iP:
-
6-γ-γ-(dimethylallylamino)-purine
- CPA:
-
4,Chlorophenoxyacetic acid
- SP:
-
Spirodela growth medium
- TDZ (Thidiazuron):
-
(1-Phenyl-3-(1,2,3,-thiadiazol-5-yl) urea
- WP:
-
McCown woody plant medium
- WT:
-
Wild type
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Acknowledgments
We thank Dina Heller for expert assistance. ME acknowledges partial support from the Charles & Tillie Lubin Center for Plant Biotechnology at the Weizmann Institute of Science.
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Communicated by A. Atanassov.
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Vunsh, R., Li, J., Hanania, U. et al. High expression of transgene protein in Spirodela . Plant Cell Rep 26, 1511–1519 (2007). https://doi.org/10.1007/s00299-007-0361-4
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DOI: https://doi.org/10.1007/s00299-007-0361-4