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자료유형
학술저널
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한국식물병리학회 The Plant Pathology Journal The Plant Pathology Journal 제32권 제4호
발행연도
2016.8
수록면
347 - 356 (10page)

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Plants protect themselves from pathogen attacks via several mechanisms, including hypersensitive cell death. Recognition of pathogen attack by the plant resistance gene triggers expression of carboxylester-ase genes associated with hypersensitive response. We identified six transcripts of carboxylesterase genes, Vitis flexuosa carboxylesterase 5585 (VfCXE5585), Vf-CXE12827, VfCXE13132, VfCXE17159, VfCXE18231, and VfCXE47674, which showed different expres sion patterns upon transcriptome analysis of V. flexuosa inoculated with Elsinoe ampelina. The lengths of genes ranged from 1,098 to 1,629 bp, and their en-coded proteins consisted of 309 to 335 amino acids. The predicted amino acid sequences showed hydrolase like domains in all six transcripts and contained two conserved motifs, GXSXG of serine hydrolase charac-teristics and HGGGF related to the carboxylesterase family. The deduced amino acid sequence also con-tained a potential catalytic triad consisted of serine, aspartic acid and histidine. Of the six transcripts, Vf-CXE12827 showed upregulated expression against E. ampelina at all time points. Three genes (VfCXE5585, VfCXE12827, and VfCXE13132) showed upregula-tion, while others (VfCXE17159, VfCXE18231, and VfCXE47674) were down regulated in grapevines in-fected with Botrytis cinerea. All transcripts showed upregulated expression against Rhizobium vitis at early and later time points except VfCXE12827, and were downregulated for up to 48 hours post inocula-tion (hpi) after upregulation at 1 hpi in response to R.vitis infection. All tested genes showed high and differ-ential expression in response to pathogens, indicating that they all may play a role in defense pathways dur-ing pathogen infection in grapevines.

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