title: Characterization of a TIR-NBS-LRR gene associated with downy mildew resistance in grape.
abstract: Grapevine downy mildew, caused by Plasmopara viticola, is a devastating disease that results in considerable economic losses as well as environmental damage through the repeated application of fungicides. The nucleotide-binding site leucine-rich repeat gene family functions in plant immunoactivity against various pathogens and pests. In this study, the 5' and 3' ends of the resistance gene homology fragment RGA5 were obtained by rapid amplification of cDNA ends. The 4282-base pair full-length cDNA was obtained using gene-specific primers, and the corresponding 1335-amino acid protein sequence contained characteristic nucleotide-binding site leucine-rich repeat domains of plant resistance proteins, including the toll-interleukin receptor type region. Expression of RGA5 during P. viticola infection and abiotic stress was investigated using quantitative real-time polymerase chain reaction. The results showed that treatment with P. viticola and 4 abiotic stimuli (salicyclic acid, methyl-jasmonate, abscisic acid, H2O2) significantly induced RGA5 within 12 days of inoculation. Therefore, RGA5 may play a critical role in protecting grapevines against P. viticola via signaling pathways involving these molecules.
authors.affiliation: jinjuanf@hotmail.com.
authors.forename: J J
authors.initials: JJ
authors.lastname: Fan
authors.forename: P
authors.initials: P
authors.lastname: Wang
authors.affiliation: College of Bioscience and Technology, Shenyang Agricultural University, Shenyang, China.
authors.forename: X
authors.initials: X
authors.lastname: Xu
authors.affiliation: Heilongjiang Academy of Agricultural Sciences, Haerbin, China.
authors.forename: K
authors.initials: K
authors.lastname: Liu
authors.affiliation: College of Bioscience and Technology, Shenyang Agricultural University, Shenyang, China.
authors.forename: Y Y
authors.initials: YY
authors.lastname: Ruan
authors.affiliation: College of Bioscience and Technology, Shenyang Agricultural University, Shenyang, China.
authors.forename: Y S
authors.initials: YS
authors.lastname: Zhu
authors.affiliation: College of Bioscience and Technology, Shenyang Agricultural University, Shenyang, China.
authors.forename: Z H
authors.initials: ZH
authors.lastname: Cui
authors.forename: L J
authors.initials: LJ
authors.lastname: Zhang
mesh_terms: D000595:Amino Acid Sequence; D060467:Disease Resistance / Q000235:genetics*; D018506:Gene Expression Regulation, Plant; D017343:Genes, Plant; D008969:Molecular Sequence Data; D044742:Peronospora / Q000502:physiology; D010935:Plant Diseases / Q000235:genetics* / Q000382:microbiology*; D010940:Plant Proteins / Q000737:chemistry / Q000235:genetics; D017434:Protein Structure, Tertiary; D060888:Real-Time Polymerase Chain Reaction; D015854:Up-Regulation / Q000235:genetics; D027843:Vitis / Q000235:genetics* / Q000382:microbiology*
chemical_list: D010940:Plant Proteins