Induction of Resistance to <i>Verticillium dahliae</i> in <i>Arabidopsis thaliana</i> by the Biocontrol Agent K-165 and Pathogenesis-Related Proteins Gene Expression
書誌事項
- 公開日
- 2005-06
- DOI
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- 10.1094/mpmi-18-0555
- 公開者
- Scientific Societies
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説明
<jats:p> The biocontrol bacterium Paenibacillus alvei K165 has the ability to protect Arabidopsis thaliana against Verticillium dahliae. A direct antagonistic action of strain K165 against V. dahliae was ruled out, making it likely that K165-mediated protection results from induced systemic resistance (ISR) in the host. K165-mediated protection was tested in various Arabidopsis mutants and transgenic plants impaired in defense signaling pathways, including NahG (transgenic line degrading salicylic acid [SA]), etr1-1 (insensitive to ethylene), jar1-1 (insensitive to jasmonate), npr1-1 (non-expressing NPR1 protein), pad3-1 (phytoalexin deficient), pad4-1 (phytoalexin deficient), eds5/sid1 (enhanced disease susceptibility), and sid2 (SA-induction deficient). ISR was blocked in blocked in Arabidopsis mutants npr1-1, eds5/sid1, and sid2, indicating that components of the pathway from isochorismate and a functional NPR1 play a crucial role in the K165-mediated ISR. Furthermore, the concomitant activation and increased transient accumulation of the PR-1, PR-2, and PR-5 genes were observed in the treatment in which both the inducing bacterial strain and the challenging pathogen were present in the rhizosphere of the A. thaliana plants. </jats:p>
収録刊行物
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- Molecular Plant-Microbe Interactions®
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Molecular Plant-Microbe Interactions® 18 (6), 555-561, 2005-06
Scientific Societies