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Plastid transformants of tomato selected using mutations affecting ribosome structure.

G D Nugent¹, M Ten Have, A van der Gulik

¹Biology Department, National University of Ireland, Maynooth, County Kildare, Ireland.

Plant Cell Reports

|June 21, 2005

Summary

Tomato plastid transformation was achieved using engineered DNA, conferring antibiotic resistance. This method successfully integrated foreign DNA into the tomato plastome, demonstrating a novel selection strategy.

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Area of Science:

Plant Biotechnology
Molecular Biology
Genetics

Background:

Plastid transformation offers a powerful tool for genetic engineering in plants.
Developing efficient transformation and selection methods is crucial for crop improvement.

Purpose of the Study:

To establish a robust method for generating tomato plastid transformants using non-bacterial antibiotic resistance genes.
To demonstrate the successful integration and maternal inheritance of foreign plastid DNA in tomato.

Main Methods:

PEG-mediated direct DNA uptake into tomato protoplasts.
Selection of transformants using spectinomycin and streptomycin resistance markers.
Confirmation of DNA integration via restriction enzyme mapping and sequence analysis.

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Main Results:

Successfully generated tomato plastid transformants using vectors from Nicotiana tabacum and Solanum nigrum.
Confirmed integration of foreign plastid DNA into the tomato plastome through recombination events.
Demonstrated maternal inheritance of acquired antibiotic resistances in the resulting seedlings.

Conclusions:

The study validates a novel selection strategy for plastid transformation in tomato, avoiding the use of bacterial antibiotic resistance genes.
This approach enhances the efficiency and applicability of plastid genetic engineering in tomato.