Related Experiment Videos
Genetically engineered protection against viruses in transgenic plants
1Scripps Research Institute, La Jolla, California 92037.
Annual Review of Microbiology
|January 1, 1993
Summary
Transgenic plants engineered with viral DNA sequences show enhanced resistance to plant viruses. These viral sequences can protect plants by interfering with various stages of viral infection and replication.
Area of Science:
- Plant biotechnology
- Virology
- Molecular biology
Background:
- Transgenic plants offer a promising strategy for conferring resistance to viral diseases.
- Various viral genetic elements have been explored for their potential to induce resistance or tolerance in host plants.
Purpose of the Study:
- To review and summarize the different types of viral sequences used in transgenic plants for disease resistance.
- To analyze the mechanisms and spectrum of protection conferred by these viral sequences.
Main Methods:
- Review of scientific literature on transgenic plant resistance to viruses.
- Analysis of studies detailing viral sequence integration and expression in plant genomes.
- Evaluation of reported resistance levels and breadth against different viral pathogens.
Main Results:
- Viral sequences, including coat proteins, replicase components, non-coding regions, and defective genomes, can confer resistance or tolerance.
- Transgenes can target multiple stages of the viral life cycle, including infection initiation, replication, and spread.
- Protection levels vary from low to high, with a spectrum ranging from narrow (specific to related strains) to moderately broad (effective against other viruses).
Conclusions:
- Transgenic plants expressing viral sequences represent a viable approach for managing plant viral diseases.
- The effectiveness of viral sequences is context-dependent, with variations observed across different virus-host systems.
- Further research is needed to elucidate the precise molecular mechanisms underlying virus-derived resistance in transgenic plants.