Host resistance - Phenotypic expression of resistance
4 important questions on Host resistance - Phenotypic expression of resistance
What is remarkable about the expression of resistance alleles in the context of the 'gene-for-gene' relationship?
- The expression also 'only' acts as a kind of 'switch' for resistance reaction.
What are some genes that confer resistance to Cladosporium fulvum in tomato, and how does their effectiveness vary?
- The Cf4 gene is not effective at higher (26°C) or lower temperatures (15°C).
How do some resistance genes behave differently in wheat compared to those in tomato?
- Some resistance genes act early in pathogen development, others later.
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What factors can modify the phenotypic expression of resistance?
- The host genotype for the avirulence gene.
- The temperature and tissue type affecting the resistance gene expression.
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