Identification of bacterial secondary metabolites that promote arbuscular mycorrhiza formation

2016 Fiscal Year Final Research Report

• Project/Area Number: 26660098
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Bioorganic chemistry
• Research Institution: Osaka Prefecture University
• Principal Investigator: AKIYAMA Kohki 大阪府立大学, 生命環境科学研究科, 教授 (20285307)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: アーバスキュラー菌根菌 / 菌根ヘルパーバクテリア / N-アシルホモセリンラクトン / シデロフォア

Outline of Final Research Achievements

Arbuscular mycorrhizas are formed between more than 80% of land plants and arbuscular mycorrhizal (AM) fungi. Certain bacteria living on spores and hyphae of AM fungi promote mycorrhizal development and functioning and are therefore called mycorrhiza helper bacteria (MHB). The underlying mechanisms involve the production of growth factors that might stimulate spore germination, hyphal growth, and root receptiveness to the fungus. However, little is known about active principles responsible for the helper effects exerted by MHB. In this study, we found that bacterial siderophores stimulated AM fungal growth and induced a putative siderophore-iron transporter gene, SIT2, in an AM fungus Rhizophagus irregularis.

Free Research Field

天然物化学