数字农科院2.0

Characterization of a Gene Identified in Pathotype 5 of the Clubroot Pathogen Plasmodiophora brassicae

文献类型： 外文期刊

作者： Zhang, H.;Zhang, H.;Feng, J.;Hwang, S. -F.;Zhang, H.;Manolii, V. P.;Strelkov, S. E.

作者机构：

关键词： gene expression;horizontal gene transfer;resistance;virulence

期刊名称： PHYTOPATHOLOGY

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年卷期：

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收录情况： SCI

摘要： Clubroot caused by Plasmodiophora brassicae is an important disease of crucifers worldwide. Isolates of the pathogen can be classified into pathotypes according to their pathogenicity on differential hosts. In this study, the presence or absence of all database-available nonhousekeeping P. brassicae genes (118 in total) were assessed by polymerase chain reaction (PCR) analysis in isolates belonging to five P. brassicae pathotypes (2, 3, 5, 6, and 8 according to Williams' differential set). One gene, designated Cr811, was present exclusively in the isolate of pathotype 5. This was further confirmed by dot blot hybridization and by PCR using alternative DNA preparations and primers. Reverse transcription quantitative PCR analysis indicated that in planta expression of Cr811 was upregulated during canola infection, especially in the stage of secondary plasmodia. Primers specific to Cr811 could distinguish a field isolate of P. brassicae belonging to pathotype 5 from two other field isolates representing pathotypes 3 and 8. These findings suggest that Cr811 is a gene that is potentially involved in clubroot pathogenesis and that it also might serve as a molecular marker for differentiation of pathotype 5 from other pathotypes.

分类号： S432.1

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