亜鉛指の転写因子であるFgMsn2は,小麦菌Fusarium graminearumのストレス反応,病原性および代謝を調節する

Daiyuan Sun¹, Chengliang Li¹, Liangyuan Zhao¹

¹State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, College of Plant Protection, Northwest A&F University, Yangling, 712100, Shaanxi, China.

Stress biology

|September 1, 2025

まとめ

フサリウム・グラミナー

科学分野:

植物病理学
分子菌学
キノコストレス生物学

背景:

環境ストレスへの適応は,真菌病原体の生存と病原性にとって不可欠です.
転写因子は環境変化に対する真菌の反応を調節する上で重要な役割を果たします
これらの調節因子を理解することは効果的な病気管理戦略の開発に不可欠です

研究の目的:

Fusarium graminearumの転写因子FgMsn2の機能を特定し,特徴づけること.
FgMsn2の真菌発育,病原性,ストレス耐性における役割を調査する.
FgMsn2の調節機能の基礎にある分子メカニズムを解明する.

主な方法:

FgMsn2の遺伝子削除と構造分析
様々なストレス条件下でのFgMsn2消去変異体のフェノタイプ分析
FgMsn2調節遺伝子を特定するためのRNA配列解析 (RNA-seq).
デオキシニバルノール (DON) 生成と病原性測定の分析
ミトコンドリアの形状とATPの生成を測定する.

主要な成果:

FgMsn2は,F. graminearumの植物性成長とコンディオゲネシスに不可欠である.
FgMSN2の除去により,DONの生成と病原性が大幅に減少し,ストレス耐性を高めました.
FgMsn2はエネルギーと脂質代謝に関与する遺伝子を調節し,ミトコンドリアの構造と機能に影響を与えます.
Fgmsn2変異体はミトコンドリアの形態が乱され,ATPの生成が低下し,脂質滴の蓄積が増加した.

結論:

FgMsn2は,真菌の発達,病原性,ストレス適応,代謝の重要なレギュラーである.
FgMsn2の保存されたC2H2亜鉛指領域は,種特有の機能の可能性を示唆する.
FgMsn2は新しい殺菌剤を開発し,植物病管理を改善するための有望なターゲットです.

キーワード:

フサリウム・グラミナーデオキシニバルノール (DON)脂質代謝ミトコンドリアの形態ストレス反応転写因子

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