title: HvCEBiP, a gene homologous to rice chitin receptor CEBiP, contributes to basal resistance of barley to Magnaporthe oryzae.
abstract: BACKGROUND
  Rice CEBiP recognizes chitin oligosaccharides on the fungal cell surface or released into the plant apoplast, leading to the expression of plant disease resistance against fungal infection. However, it has not yet been reported whether CEBiP is actually required for restricting the growth of fungal pathogens. Here we evaluated the involvement of a putative chitin receptor gene in the basal resistance of barley to the ssd1 mutant of Magnaporthe oryzae, which induces multiple host defense responses.
  
  
  RESULTS
  The mossd1 mutant showed attenuated pathogenicity on barley and appressorial penetration was restricted by the formation of callose papillae at attempted entry sites. When conidial suspensions of mossd1 mutant were spotted onto the leaves of HvCEBiP-silenced plants, small brown necrotic flecks or blast lesions were produced but these lesions did not expand beyond the inoculation site. Wild-type M. oryzae also produced slightly more severe symptoms on the leaves of HvCEBiP-silenced plants. Cytological observation revealed that these lesions resulted from appressorium-mediated penetration into plant epidermal cells.
  
  
  CONCLUSIONS
  These results suggest that HvCEBiP is involved in basal resistance against appressorium-mediated infection and that basal resistance might be triggered by the recognition of chitin oligosaccharides derived from M. oryzae.
authors.affiliation: Kyoto Prefectural University, Japan.
authors.forename: Shigeyuki
authors.initials: S
authors.lastname: Tanaka
authors.forename: Akari
authors.initials: A
authors.lastname: Ichikawa
authors.forename: Kaori
authors.initials: K
authors.lastname: Yamada
authors.forename: Gento
authors.initials: G
authors.lastname: Tsuji
authors.forename: Takumi
authors.initials: T
authors.lastname: Nishiuchi
authors.forename: Masashi
authors.initials: M
authors.lastname: Mori
authors.forename: Hironori
authors.initials: H
authors.lastname: Koga
authors.forename: Yoko
authors.initials: Y
authors.lastname: Nishizawa
authors.forename: Richard
authors.initials: R
authors.lastname: O'Connell
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Kubo
mesh_terms: D000595:Amino Acid Sequence; D005656:Fungal Proteins / Q000235:genetics; D018506:Gene Expression Regulation, Plant; D020868:Gene Silencing; D001467:Hordeum / Q000235:genetics* / Q000382:microbiology; D054884:Host-Pathogen Interactions; D007113:Immunity, Innate / Q000235:genetics; D020082:Magnaporthe / Q000235:genetics* / Q000502:physiology; D008969:Molecular Sequence Data; D009154:Mutation; D010935:Plant Diseases / Q000235:genetics* / Q000382:microbiology; D018515:Plant Leaves / Q000235:genetics / Q000382:microbiology; D010940:Plant Proteins / Q000235:genetics* / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction; D017386:Sequence Homology, Amino Acid
chemical_list: D005656:Fungal Proteins; D010940:Plant Proteins