Global regulation of pathogenicity mechanism of Ralstonia solanacearum
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概要
- 論文の詳細を見る
Bacterial wilt caused by Ralstonia solanacearum is one of the most devastating plant diseases worldwide. R. solanacearum first invades intercellular spaces of roots where it multiplies before invading xylem vessels and producing exopolysaccharide (EPS), leading to wilt of the infected plant. In this review, we focus on regulation of R. solanacearum pathogenicity, which requires proliferation in intercellular spaces. R. solanacearum possesses hrp encoding the type III secretion system (T3SS), and its pathogenicity depends on interactions between the host plant and type III effectors. HrpB positively regulates expression of not only hrp but also genes encoding exoproteins secreted through the type II secretion system (T2SS). A consortium of T2SS-secreted exocellular proteins containing plant cell wall-degrading enzymes contributes to not only invasion of xylem vessels, leading to systemic infection, but also quantitative control of virulence. Moreover, T2SS functionally interacts with T3SS. PhcA activated by quorum sensing in response to the bacterial cell density induces expression of xpsR, leading to biosynthesis of EPS. Moreover, active PhcA also suppresses expression of prhIR, resulting in suppression of hrp expression. These results suggest that R. solanacearum pathogenicity is globally regulated by mutual regulation by pathogenicity factors through multiplication of the bacteria in intercellular spaces.
- 日本植物細胞分子生物学会の論文
- 2007-03-01
著者
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OHNISHI Kouhei
Research Institute of Molecular Genetics, Kochi University
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Ohnishi Kouhei
Research Institute Of Molecular Genetics Kochi University
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KIBA Akinori
Laboratory of Plant Pathology and Biotechnology, Faculty of Agriculture, Kochi University
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HIKICHI Yasufumi
Laboratory of Plant Pathology and Biotechnology, Faculty of Agriculture, Kochi University
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KANDA Ayami
Laboratory of Plant Pathology and Biotechnology, Kochi University
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Kanda Ayami
Laboratory Of Plant Pathology And Biotechnology Faculty Of Agriculture Kochi University
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YOSHIMOCHI Takeshi
Laboratory of Plant Pathology and Biotechnology, Faculty of Agriculture, Kochi University
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TSUJIMOTO Shintaro
Laboratory of Plant Pathology and Biotechnology, Faculty of Agriculture, Kochi University
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SHINOHARA Rena
Laboratory of Plant Pathology and Biotechnology, Faculty of Agriculture, Kochi University
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NAKAHO Kazuhiro
National Agricultural Research Center
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Hikichi Y
Laboratory Of Plant Pathology And Biotechnology Kochi University
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Hikichi Yasufumi
Laboratory Of Plant Pathology & Biotechnology Faculty Of Agriculture Kochi University
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Ohnishi Kouhei
Kochi University
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Yoshimochi Takeshi
Kochi University
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Kita Akinori
Kochi University
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Kiba Akinori
Laboratory Of Plant Pathology And Genetic Engineering College Of Agriculture Okayama University
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Kiba A
Laboratory Of Plant Pathology And Biotechnology Kochi University
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Kiba Akinori
Laboratory Of Plant Pathology And Biotechnology Faculty Of Agriculture Kochi University
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Shinohara Rena
Laboratory Of Plant Pathology And Biotechnology Faculty Of Agriculture Kochi University
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Ohnishi Kouhei
Institute Of Molecular Genetics Kochi University
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Tsushima Seiya
Chiba Pest Management Center
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Tsujimoto Shintaro
Laboratory Of Plant Pathology And Biotechnology Faculty Of Agriculture Kochi University
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Yoshimochi Takeshi
Laboratory Of Plant Pathology And Biotechnology Kochi University
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Hikichi Yasufumi
Laboratory Of Plant Pathology And Biotechnology Kochi University
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