Mechanisms of acquisition of organic phosphate by arbuscular mycorrhizal fungi

2018 Fiscal Year Final Research Report

• Project/Area Number: 15K07332
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Plant nutrition/Soil science
• Research Institution: Yamagata University
• Principal Investigator: Tawaraya Keitaro 山形大学, 農学部, 教授 (70179919)
• Project Period (FY): 2015-04-01 – 2019-03-31
• Keywords: 有機態リン酸 / アーバスキュラー菌根菌 / 酸性ホスファターゼ

Outline of Final Research Achievements

Extraradical hyphae of arbuscular mycorrhizal (AM) fungi have acid phosphatase but its exudation is unknow. Soil solution was collected from hyphal compartment inoculated with AM fungus Rhizophagus clarus. ACP activity of 187 kDa was detected from soil solution of inoculated plant. Acid phosphatase activity in hyphal compartment of Linum usitatissimum was higher at low P level than that at high P level. These results suggest that AM fungi R. clarus exudes ACP and its exudation increased under P deficient condition.

Free Research Field

植物栄養学・土壌学

Academic Significance and Societal Importance of the Research Achievements

リン酸資源枯渇へ対応するためには農耕地における有機態リン酸を利用する必要がある。土壌中の外生菌糸から酸性ホスファターゼを浸出するアーバスキュラー菌根菌を作物に接種して利用することができれば、農耕地における有機態リン酸の利用が向上し、リン酸資源を国内で持続的に循環させることができる。