Metarhizium anisopliaeによる真菌病原体感染は,LdMNPVによって誘発される樹冠病でLymantria disparの登山行動を変化させる
Qi Song1, Yu-Shan Wei1, Dun Wang1,2
1Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, College of Plant Protection, Northwest A&F University, Yangling 712100, China.
Biology
|September 4, 2025
まとめ
この研究では,Lymantria disparの幼虫とMetarhizium anisopliaeとLymantria dispar複数の核ポリヘドウイルス (LdMNPV) の共感染が,バイオコントロールの有効性を強化し,樹冠疾患の進行を変化させ,死亡率を加速することを明らかにしました.
科学分野:
- 昆虫病理について
- 行動エコロジー
- バイオコントロール剤
背景:
- 寄生虫はしばしば宿主の行動を操作して伝染します 例えばバキュロウイルスに感染したレピドプテリアの幼虫は"樹冠病"を発症します
- Lymantria disparのバキュロウイルス誘発の"樹冠病"を駆動する正確なメカニズムは不明である.
研究 の 目的:
- Metarhizium anisopliaeとLymantria dispar複数の核ポリヘドウイルス (LdMNPV) の共感染がLymantria disparの行動と死亡率に与える影響を調査する.
- 症状のプロフィールと感染の様相を比較する.
主な方法:
- Lymantria disparの幼虫はM. anisopliae,LdMNPV,または両方の病原体に感染していた.
- 症状のプロファイル,行動の変化,および死亡率は,各感染グループで評価されました.
主要な成果:
- M. anisopliaeは,LdMNPV誘発の多動性を変化させ,当初は"樹冠病"の行動を促進し,その後抑制した.
- 併感染した幼虫は,単一の病原体感染と比較して,特徴的な症状と著しく加速した死亡率を示した.
- M. アニソプリアとLdMNPVの間の相乗効果は,L. ディスパのバイオコントロールで観察された.
結論:
- 同感染はL. disparの行動反応とLdMNPV誘発の"樹冠病"の病原性を調節する.
- M.アニソプリアとLdMNPVの間の相乗効果は,L. disparの生物制御戦略に希望を示しています.
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