教員情報

イナガキ　ヨシシゲ   INAGAKI YOSHISHIGE   稲垣　善茂    所属   文学部 教育学科    職種   教授
言語種別	英語
発行・発表の年月	2008
形態種別	論文
査読	査読あり
標題	Gac two-component system in Pseudomonas syringae pv. tabaci is required for virulence but not for hypersensitive reaction.
執筆形態	共著
掲載誌名	Mol. Genet. Genomics
掲載区分	国外
巻・号・頁	279((4)),pp.313-322
著者・共著者	Marutani M, Taguchi F, Ogawa Y, Hossain MM, Inagaki Y, Toyoda K, Shiraishi T, Ichinose Y.
概要	Pseudomonas syringae pv. tabaci 6605 causes wildfire disease on host tobacco plants. To investigate the regulatory mechanism of the expression of virulence, Gac two-component system-defective mutants, DeltagacA and DeltagacS, and a double mutant, DeltagacADeltagacS, were generated. These mutants produced smaller amounts of N-acyl homoserine lactones required for quorum sensing, had lost swarming motility, and had reduced expression of virulence-related hrp genes and the algT gene required for exopolysaccharide production. The ability of the mutants to cause disease symptoms in their host tobacco plant was remarkably reduced, while they retained the ability to induce hypersensitive reaction (HR) in the nonhost plants. These results indicated that the Gac two-component system of P. syringae pv. tabaci 6605 is indispensable for virulence on the host plant, but not for HR induction in the nonhost plants.