2021 Fiscal Year Final Research Report
Ecological study of plant pathogenic Pantoea spp.
| Project/Area Number |
19K06050
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 39040:Plant protection science-related
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| Research Institution | Shizuoka University |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | Pantoea ananatis / 生態 / ミナミアオカメムシ |
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| Outline of Final Research Achievements |
A plant pathogenic bacterium, Pantoea ananatis was isolated from various plants and insects. Presence or absence of the pathogenicity determinant genetic locus PASVIL was investigated for the isolates. P. ananatis could be isolated from various gramineous plants, among which rice plants yielded high number and ratio of PASVIL positive isolates. Isolation of P. anantis from insects are not so often. Only southern green stink bug (Nezara viridula) produced P. ananatis colonies of PASVIL-positive plant pathogenic isolates. This is the first report of isolation of plant pathogenic P. ananatis from stink bug. This stink bug is also known as an important rice pest and its ecological relationship was strongly suggested with rice palea browning disease caused by P. ananatis.
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| Free Research Field |
植物病理学
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| Academic Significance and Societal Importance of the Research Achievements |
イネ内穎褐変病などのPantoea ananatisによって生じる病害は，その発生生態が十分に解明されていないことから防除手法が確立されていない．その大きな原因は病原性株と非病原株とを区別した生存様態が把握されていないことによる．本研究により病原性のP. ananatis株はイネ植物体上のほか様々な植物にも低頻度ながら存在していること，土壌などにはおらず，昆虫ではミナミアオカメムシから高率に分離されることなどが明らかになった．これによりカメムシと植物細菌病との関連が初めて強く示唆されたため，今後害虫防除による病害の同時防除の可能性があり農業への応用上重要な成果が得られた．
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