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- Title
Allelic variation in two distinct Pseudomonas syringae flagellin epitopes modulates the strength of plant immune responses but not bacterial motility.
- Authors
Clarke, Christopher R.; Chinchilla, Delphine; Hind, Sarah R.; Taguchi, Fumiko; Miki, Ryuji; Ichinose, Yuki; Martin, Gregory B.; Leman, Scotland; Felix, Georg; Vinatzer, Boris A.
- Abstract
The bacterial flagellin (FliC) epitopes flg22 and flg II-28 are microbe-associated molecular patterns ( MAMPs). Although flg22 is recognized by many plant species via the pattern recognition receptor FLS2, neither the flg II-28 receptor nor the extent of flg II-28 recognition by different plant families is known., Here, we tested the significance of flg II-28 as a MAMP and the importance of allelic diversity in flg22 and flg II-28 in plant-pathogen interactions using purified peptides and a Pseudomonas syringae ∆ fliC mutant complemented with different fliC alleles., The plant genotype and allelic diversity in flg22 and flg II-28 were found to significantly affect the plant immune response, but not bacterial motility. The recognition of flg II-28 is restricted to a number of solanaceous species. Although the flg II-28 peptide does not trigger any immune response in Arabidopsis, mutations in both flg22 and flg II-28 have FLS2-dependent effects on virulence. However, the expression of a tomato allele of FLS2 does not confer to Nicotiana benthamiana the ability to detect flg II-28, and tomato plants silenced for FLS2 are not altered in flg II-28 recognition., Therefore, MAMP diversification is an effective pathogen virulence strategy, and flg II-28 appears to be perceived by an as yet unidentified receptor in the Solanaceae, although it has an FLS2-dependent virulence effect in Arabidopsis.
- Subjects
PSEUDOMONAS syringae; FLAGELLIN; PEPTIDES; PLANT-pathogen relationships; ARABIDOPSIS; ALLELES; MICROBIAL virulence
- Publication
New Phytologist, 2013, Vol 200, Issue 3, p847
- ISSN
0028-646X
- Publication type
Article
- DOI
10.1111/nph.12408