2022 Fiscal Year Final Research Report
Molecular phylogenetic analysis of obligate plant parasites, Erysiphaceae, to elucidate their adaptation mechanisms to tree and herbaceous hosts
| Project/Area Number |
19K06124
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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 40010:Forest science-related
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| Research Institution | Mie University |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2023-03-31
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| Keywords | ウドンコカビ / 系統種間比較法 / 系統推定 / 越冬戦略 / 形態 / 宿主 / 分類 / 進化 |
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| Outline of Final Research Achievements |
As a result of a field survey aimed at elucidating the species diversity of Japanese Erysiphaceae, the occurrence of Podosphaera prunigena from Cerasus kumanoensis was confirmed for the first time. A phylogenetic analysis using sequences of the LSU, 5.8S, SSU, and MCM7 regions of 274 Erysiphaceae species was conducted to generate a more reliable phylogenetic hypothesis. To clarify the evolutionary relationship between host type and appendage morphology in Erysiphaceae, we performed a phylogenetic comparative methods using Cyctotheceae as a model fungal group. The results suggest that simultaneous shifts in host type and appendage morphology occurred in multiple ancestral nodes.
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| Free Research Field |
菌類生態学
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| Academic Significance and Societal Importance of the Research Achievements |
ウドンコカビ目は17属約900種からなる植物絶対寄生菌で，有用樹木や農作物を含む被子植物1万種以上に“うどんこ病”を引き起こす重要病原菌である．うどんこ病の正確かつ迅速な病害診断と防除を達成するうえで，系統関係を反映した分類体系の整備および宿主植物への適応機構の解明が必要である．しかし，ウドンコカビ目の高次の系統関係が不明なため分類体系の一部が未整理であり，多様な木本・草本宿主への適応機構についても未検証である．本研究では，日本産ウドンコカビの多様性調査による分類学的知見の蓄積，大規模系統解析による信頼性の高い系統仮説の提示，系統比較法による宿主タイプと付属糸形態の進化的関係の推定を行った．
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