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Jellyfish green fluorescent protein as a useful reporter for transient expression and stable transformation in Medicago sativa L.

  • Genetic Transformation and Hybridization
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Abstract

The aim of the experiments reported herein was to transiently test different gene constructs using green fluorescent protein (GFP) as a reporter gene for a future localization of the maize β-zein in the chloroplast of alfalfa (Medicago sativa L.). The transient expression of two GFP genes was compared in alfalfa leaves to determine which of these two mutants is the easier to detect. Based on the intensity of fluorescence emitted, the GFP S65C gene was used to assemble a chloroplast-targeted GFP to verify the efficiency of the transit peptide for chloroplast targeting. A chloroplast-targeted fusion protein between β-zein and GFP was then assembled, and this protein was observed to accumulate in small aggregates into the chloroplasts of transiently transformed cells. To the best of our knowledge, this is the first report of the GFP S65C gene being used to obtain transformed alfalfa plants expressing GFP.

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Acknowledgements

Contribution no. 35 from the Institute of Plant Genetics, Research Division of Perugia, CNR. We wish to thank all members of our laboratory, particularly Dr. O. Calderini, for their stimulating comments during the experiments. We are also grateful to G. Carpinelli, F. Calderini and A. Bolletta for their technical assistance; to Ulrike Bechtold, Roger Hellens and Phil Mullineaux for providing us with the pGreen plasmid; to Dr. E.T. Bingham for providing us with seeds of the cultivar Regen SY. This work has been supported by MIUR, Project FIRB no. RBNE01TYZF.

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Correspondence to M. Bellucci.

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Communicated by D. Dudits

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Bellucci, M., De Marchis, F., Mannucci, R. et al. Jellyfish green fluorescent protein as a useful reporter for transient expression and stable transformation in Medicago sativa L.. Plant Cell Rep 22, 328–337 (2003). https://doi.org/10.1007/s00299-003-0693-7

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  • DOI: https://doi.org/10.1007/s00299-003-0693-7

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