Genetics of plant-pathogen interactions
Ji1, Smith-Becker, Keen
1Department of Plant Pathology University of California Riverside, CA 92521, USA
Current Opinion in Biotechnology
|July 17, 1998
Summary
Plant disease resistance genes recognize pathogen elicitors, triggering defense mechanisms. Advances in gene sequencing offer opportunities to engineer enhanced plant immunity for improved disease control.
Area of Science:
- Plant pathology
- Molecular genetics
- Plant immunity
Background:
- Plant disease resistance genes (R genes) are crucial for recognizing pathogen-derived molecules called elicitors.
- The elicitor-receptor model suggests R genes interact with elicitors to activate plant defenses.
- Elicitor perception can be complex, involving pathogen secretion systems and processing before recognition.
Purpose of the Study:
- To review recent advances in understanding plant disease resistance genes and their function.
- To explore the molecular mechanisms of plant-pathogen interactions and elicitor recognition.
- To discuss the potential for engineering disease resistance in plants for agricultural applications.
Main Methods:
- Review of current literature on plant disease resistance genes and elicitor-receptor interactions.
- Analysis of data supporting the elicitor-receptor model and its complexities.
- Examination of recent progress in cloning and sequencing plant R genes.
Main Results:
- Evidence supports the elicitor-receptor model, but recognition mechanisms are intricate.
- Many elicitors act as virulence factors co-opted by plants for resistance.
- Cloning and sequencing of R genes reveal insights into specificity and potential for engineering.
Conclusions:
- Understanding R gene function and elicitor recognition is advancing rapidly.
- Engineering R genes offers a promising strategy for developing durable disease resistance in crops.
- These advancements can significantly contribute to sustainable agricultural disease management.
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