Chacón O, González M, López Y, Portieles R, Pujol M, González E, Schoonbeek HJ, Métraux JP, Borrás-Hidalgo O. Over-expression of a protein kinase gene enhances the defense of tobacco against Rhizoctonia solani.
Gene 2010;
452:54-62. [PMID:
20004236 DOI:
10.1016/j.gene.2009.11.011]
[Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2009] [Revised: 11/18/2009] [Accepted: 11/22/2009] [Indexed: 11/22/2022]
Abstract
To identify Nicotiana tabacum genes involved in resistance and susceptibility to Rhizoctonia solani, suppression subtractive hybridization was used to generate a cDNA library from transcripts that are differentially expressed during a compatible and incompatible interaction. This allowed the isolation of a protein kinase cDNA that was down-regulated during a compatible and up-regulated during an incompatible interaction. Quantitative RT-PCR analysis of this gene confirmed the differential expression patterns between the compatible and incompatible interactions. Over-expression of this gene in tobacco enhanced the resistance to damping-off produced by an aggressive R. solani strain. Furthermore, silencing of this protein kinase gene reduced the resistance to a non-aggressive R. solani strain. A set of reported tobacco-resistant genes were also evaluated in tobacco plants over-expressing and silencing the protein kinase cDNA. Several genes previously associated with resistance in tobacco, like manganese superoxide dismutase, Hsr203J, chitinases and phenylalanine ammonia-lyase, were up-regulated in tobacco plants over-expressing the protein kinase cDNA. Potentially, the protein kinase gene could be used to engineer resistance to R. solani in tobacco cultivars susceptible to this important pathogen.
Collapse