2019 Fiscal Year Final Research Report
Study of small chromosomes associated with host-specificity in Fusarium oxysproum
Project/Area Number |
19K21154
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Project/Area Number (Other) |
18H06014 (2018)
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Research Category |
Grant-in-Aid for Research Activity Start-up
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Allocation Type | Multi-year Fund (2019) Single-year Grants (2018) |
Review Section |
0602:Agricultural and environmental biology and related fields
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Research Institution | Institute of Physical and Chemical Research |
Principal Investigator |
Ayukawa Yu 国立研究開発法人理化学研究所, 環境資源科学研究センター, 特別研究員 (80824474)
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Project Period (FY) |
2018-08-24 – 2020-03-31
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Keywords | キャベツ萎黄病菌 / シロイヌナズナ / 宿主特異性 / エフェクター |
Outline of Final Research Achievements |
The soil-borne pathogen Fusarium oxysporum infects more than 100 plant species. Individual pathogenic isolates have different host ranges. Small chromosomes of some pathogenic isolates have been reported to be associated with host-specific virulence. However, determinants of host specificity in the small chromosomes have not been identified. In this study, we revealed genomic sequence of a crucifer-infecting pathogen, F. oxysporum f. sp. conglutinans. We found that two virulence genes in its small chromosomes are involved in suppression of Arabidopsis-immunity. This discovery will be useful for dissecting a mechanism of host specificity in F. oxysporum.
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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 |
土壌病原菌フザリウムは、主要作物であるトマトやバナナなどに感染し、食料生産に多大な影響を与えている。フザリウムは菌株によって感染する植物が異なるが、宿主植物がどのように決まるかは不明である。本研究ではモデル植物であるシロイヌナズナに感染する菌株のゲノム解析を通して、病原性遺伝子を特定した。この成果は、フザリウムの宿主決定機構の解明の基盤となり、病害診断や耐病性植物の育種などの応用研究に波及し得る。
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