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Title: Generation, analysis, and transformation of macro-chloroplast Potato (Solanum tuberosum) lines for chloroplast biotechnology

Abstract

Abstract Chloroplast biotechnology is a route for novel crop metabolic engineering. The potential bio-confinement of transgenes, the high protein expression and the possibility to organize genes into operons represent considerable advantages that make chloroplasts valuable targets in agricultural biotechnology. In the last 3 decades, chloroplast genomes from a few economically important crops have been successfully transformed. The main bottlenecks that prevent efficient transformation in a greater number of crops include the dearth of proven selectable marker gene-selection combinations and tissue culture methods for efficient regeneration of transplastomic plants. The prospects of increasing organelle size are attractive from several perspectives, including an increase in the surface area of potential targets. As a proof-of-concept, we generated Solanum tuberosum (potato) macro-chloroplast lines overexpressing the tubulin-like GTPase protein gene FtsZ1 from Arabidopsis thaliana . Macro-chloroplast lines exhibited delayed growth at anthesis; however, at the time of harvest there was no significant difference in height between macro-chloroplast and wild-type lines. Macro-chloroplasts were successfully transformed by biolistic DNA-delivery and efficiently regenerated into homoplasmic transplastomic lines. We also demonstrated that macro-chloroplasts accumulate the same amount of heterologous protein than wild-type organelles, confirming efficient usage in plastid engineering. Advantages and limitations of using enlarge compartments in chloroplast biotechnologymore » are discussed.« less


Citation Formats

Occhialini, Alessandro, Pfotenhauer, Alexander C., Frazier, Taylor P., Li, Li, Harbison, Stacee A., Lail, Andrew J., Mebane, Zachary, Piatek, Agnieszka A., Rigoulot, Stephen B., Daniell, Henry, Stewart, Jr, C. Neal, and Lenaghan, Scott C. Generation, analysis, and transformation of macro-chloroplast Potato (Solanum tuberosum) lines for chloroplast biotechnology. United Kingdom: N. p., 2020. Web. doi:10.1038/s41598-020-78237-x.
Occhialini, Alessandro, Pfotenhauer, Alexander C., Frazier, Taylor P., Li, Li, Harbison, Stacee A., Lail, Andrew J., Mebane, Zachary, Piatek, Agnieszka A., Rigoulot, Stephen B., Daniell, Henry, Stewart, Jr, C. Neal, & Lenaghan, Scott C. Generation, analysis, and transformation of macro-chloroplast Potato (Solanum tuberosum) lines for chloroplast biotechnology. United Kingdom. https://doi.org/10.1038/s41598-020-78237-x
Occhialini, Alessandro, Pfotenhauer, Alexander C., Frazier, Taylor P., Li, Li, Harbison, Stacee A., Lail, Andrew J., Mebane, Zachary, Piatek, Agnieszka A., Rigoulot, Stephen B., Daniell, Henry, Stewart, Jr, C. Neal, and Lenaghan, Scott C. Thu . "Generation, analysis, and transformation of macro-chloroplast Potato (Solanum tuberosum) lines for chloroplast biotechnology". United Kingdom. https://doi.org/10.1038/s41598-020-78237-x.
@article{osti_1730964,
title = {Generation, analysis, and transformation of macro-chloroplast Potato (Solanum tuberosum) lines for chloroplast biotechnology},
author = {Occhialini, Alessandro and Pfotenhauer, Alexander C. and Frazier, Taylor P. and Li, Li and Harbison, Stacee A. and Lail, Andrew J. and Mebane, Zachary and Piatek, Agnieszka A. and Rigoulot, Stephen B. and Daniell, Henry and Stewart, Jr, C. Neal and Lenaghan, Scott C.},
abstractNote = {Abstract Chloroplast biotechnology is a route for novel crop metabolic engineering. The potential bio-confinement of transgenes, the high protein expression and the possibility to organize genes into operons represent considerable advantages that make chloroplasts valuable targets in agricultural biotechnology. In the last 3 decades, chloroplast genomes from a few economically important crops have been successfully transformed. The main bottlenecks that prevent efficient transformation in a greater number of crops include the dearth of proven selectable marker gene-selection combinations and tissue culture methods for efficient regeneration of transplastomic plants. The prospects of increasing organelle size are attractive from several perspectives, including an increase in the surface area of potential targets. As a proof-of-concept, we generated Solanum tuberosum (potato) macro-chloroplast lines overexpressing the tubulin-like GTPase protein gene FtsZ1 from Arabidopsis thaliana . Macro-chloroplast lines exhibited delayed growth at anthesis; however, at the time of harvest there was no significant difference in height between macro-chloroplast and wild-type lines. Macro-chloroplasts were successfully transformed by biolistic DNA-delivery and efficiently regenerated into homoplasmic transplastomic lines. We also demonstrated that macro-chloroplasts accumulate the same amount of heterologous protein than wild-type organelles, confirming efficient usage in plastid engineering. Advantages and limitations of using enlarge compartments in chloroplast biotechnology are discussed.},
doi = {10.1038/s41598-020-78237-x},
journal = {Scientific Reports},
number = 1,
volume = 10,
place = {United Kingdom},
year = {2020},
month = {12}
}

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