米葉の爆破病原菌は,根を感染させる真菌の典型的な発達過程を経験します
1The Sainsbury Laboratory, John Innes Center, Norwich, UK.
Nature
|October 1, 2004
まとめ
米爆破菌のマグナポルテ・グリーザは,これまで知られていなかった根の感染行動を示し,米の全身的侵入と病気を引き起こす. この発見は,真菌の病原性および疾病管理戦略の理解に影響を与えます.
科学分野:
- 植物病理学 植物病理学
- 菌類学 菌類学とは
- 遺伝学 遺伝学とは
背景:
- マグナポルテ・グリーザ (Magnaporthe grisea) は,米の主要な病原体であり,農業に重大な損害を及ぼしています.
- M. griseaによる葉の感染は,アプレッソリア形成を含む,明確に定義された発達段階を含みます.
- M. griseaの葉の感染に影響を与える30以上の遺伝子が特定されています.
研究 の 目的:
- マグナポート・グライゼの新たな発達経路を調査する.
- M. griseaの根感染およびその後の全身感染の可能性を特徴づける.
- 葉の感染に対して有効な既存の耐性メカニズムが,根の感染にも適用されるかどうかを判断する.
主な方法:
- 感染中のM. griseaの発達段階の観察.
- M. griseaの病原性に関する遺伝子分析.
- 根の植民後に病気の発生を評価する.
- 根の遺伝子対遺伝子抵抗性の評価.
主要な成果:
- M. griseaは,根を感染させる病原体に特徴的な,特徴のない発達の出来事を表しています.
- M. griseaによる根の植民は,全身の侵入と空中疾患の症状を引き起こす可能性があります.
- 葉の感染に対して有効な遺伝子対遺伝子の抵抗は,米の根にも機能する.
結論:
- Magnaporthe griseaは,葉と根の両方に感染し,二重の病原性戦略を有しています.
- M. griseaによる根の感染は,地上の植物部位の病気につながる可能性があります.
- 菌類の疫学,植物育種,統合疾病管理への影響は大きい.
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