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Heterochromatin-Like Regions as Ecological Niches for Avirulence Genes in the Leptosphaeria maculans Genome: Map-Based Cloning of AvrLm6
Open accessAbstract
Map-based cloning of avirulence genes of the AvrLm1-2-6 cluster was recently undertaken in Leptosphaeria maculans and led to the identification of AvrLm1. The ensuing chromosome walk toward AvrLm6 resulted in the delineation of a 562-kb bacterial artificial chromosome (BAC) clone contig in an avirulent isolate. Following sequencing of the contig and sequence comparison with a virulent isolate, four AvrLm6 candidate genes were identified. Complementation of the virulent isolate with the four candidates was performed and one gene was found to fully restore the avirulent phenotype on Rlm6 oilseed rape genotypes. AvrLm6 was found to be located in the same genome context as AvrLm1, because it is a solo gene surrounded by 85 and 48 kb of degenerated repeats on its 5′ and 3′ sides, respectively. AvrLm6 is an orphan gene encoding a small, potentially secreted, cysteine-rich protein. Comparison of AvrLm1 and AvrLm6 expressions by quantitative reverse-transcription polymerase chain reaction revealed that both genes are highly overexpressed during primary leaf infection. Using RNA interference, decreasing expression of AvrLm6 was shown to result in virulence toward Rlm6 genotypes whenever the expression was reduced by more than 60% compared with the wild-type isolate.
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Cites
Host-Microbe Interactions: Shaping the Evolution of the Plant Immune Response
Chisholm, S. T., Coaker, G., Day, B., & Staskawicz, B. J. (2006) · Cell · doi:10.1016/j.cell.2006.02.008 · Cited by 2,957
Heterochromatin and Epigenetic Control of Gene Expression
Grewal, S. I. S., & Moazed, D. (2003) · Science · doi:10.1126/science.1086887 · Cited by 1,065
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MICHIELSE, C. B., & REP, M. (2009) · Molecular Plant Pathology · doi:10.1111/j.1364-3703.2009.00538.x · Cited by 786
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Kale, S. D., Gu, B., Capelluto, D. G. S., Dou, D., Feldman, E., Rumore, A., Arredondo, F. D., Hanlon, R., Fudal, I., Rouxel, T., et al. (2010) · Cell · doi:10.1016/j.cell.2010.06.008 · Cited by 464
Self-citationLiu, Z., Zhang, Z., Faris, J. D., Oliver, R. P., Syme, R., McDonald, M. C., McDonald, B. A., Solomon, P. S., Lu, S., Shelver, W. L., et al. (2012) · PLoS Pathogens · doi:10.1371/journal.ppat.1002467 · Cited by 269
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Metadata
- Authors
- Fudal, I., Ross, S., Gout, L., Blaise, F., Kuhn, M. L., Eckert, M. R., Cattolico, L., Bernard-Samain, S., Balesdent, M. H., & Rouxel, T.
- Venue
- Molecular Plant-Microbe Interactions®
- Publisher
- Scientific Societies
- Published
- 2007-04
- Volume
- 20
- Issue
- 4
- Pages
- 459-470
- ISSN
- 0894-0282 (ISSN-L)
- 1943-7706
- OpenAlex
- W1974895740
- Cited by
- 213
- References
- 2
- FWCI
- 15.79
- Type
- journal article
- Language
- en
- Open access
- green
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- Fudal, I., Ross, S., Gout, L., Blaise, F., Kuhn, M. L., Eckert, M. R., Cattolico, L., Bernard-Samain, S., Balesdent, M. H., & Rouxel, T. (2007). Heterochromatin-Like Regions as Ecological Niches for Avirulence Genes in the Leptosphaeria maculans Genome: Map-Based Cloning of AvrLm6. Molecular Plant-Microbe Interactions®. https://doi.org/10.1094/mpmi-20-4-0459
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