title: Transcriptome analysis reveals a complex interplay between resistance and effector genes during the compatible lentil-Colletotrichum lentis interaction.
abstract: Colletotrichum lentis is a hemibiotrophic pathogen and causes anthracnose on lentil. To understand the molecular mechanism underlying the symptomatic phase of infection, a cDNA plasmid library was developed from the susceptible lentil cultivar Eston infected with an isolate of the virulent race 0 of C. lentis. The library was sequenced on the Sanger sequencing platform, generating a total of 11,094 expressed sequence tags (ESTs) representing 3,488 unigenes. Mapping of unigenes onto the C. lentis and the L. culinaris genomes resulted in the identification of 2,418 unigenes of fungal origin and 1,070 unigenes of plant origin. Gene ontology term analysis of unigenes revealed that the transcriptome contained 22 candidate effectors, such as in planta induced ToxB and CyanoVirin-N, and 26 resistance genes, including suppressor of npr1-1 constitutive 1 and dirigent. Comparative genomics analyses revealed that three of the candidate effectors are likely located in the subtelomeric regions, and two of them show no synteny with the closely related species C. higginsianum, suggesting genomic rearrangements, such as translocation during speciation to colonize different niches. The data suggest a complex molecular interplay between disease resistance proteins and effectors during compatible interaction in which the pathogen exploits defense responses mounted by the host.
authors.affiliation: Crop Development Centre/Department of Plant Sciences, University of Saskatchewan, Saskatoon, Canada.
authors.forename: Vijai
authors.initials: V
authors.lastname: Bhadauria
authors.affiliation: Crop Development Centre/Department of Plant Sciences, University of Saskatchewan, Saskatoon, Canada.
authors.forename: Perumal
authors.initials: P
authors.lastname: Vijayan
authors.affiliation: Department of Biology, University of Saskatchewan, Saskatoon, Canada.
authors.forename: Yangdou
authors.initials: Y
authors.lastname: Wei
authors.affiliation: Crop Development Centre/Department of Plant Sciences, University of Saskatchewan, Saskatoon, Canada.
authors.forename: Sabine
authors.initials: S
authors.lastname: Banniza
mesh_terms: D020231:Colletotrichum / Q000472:pathogenicity / Q000502:physiology*; D057225:Data Mining; D060467:Disease Resistance / Q000235:genetics*; D020869:Gene Expression Profiling; D018506:Gene Expression Regulation, Plant; D015723:Gene Library; D063990:Gene Ontology; D017343:Genes, Plant; D023281:Genomics; D054884:Host-Pathogen Interactions / Q000235:genetics*; D027806:Lens Plant / Q000235:genetics* / Q000276:immunology / Q000382:microbiology*; D058977:Molecular Sequence Annotation; D010935:Plant Diseases / Q000235:genetics / Q000276:immunology* / Q000382:microbiology; D057865:Plant Immunity / Q000235:genetics; D014774:Virulence / Q000235:genetics