Gene expression analysis of arbuscular mycorrhiza at the stage of symbiotic collapse

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K05329
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 38010:Plant nutrition and soil science-related
• Research Institution: Rakuno Gakuen University
• Principal Investigator: Kobae Yoshihiro 酪農学園大学, 農食環境学群, 教授 (60456598)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 菌根共生

Outline of Final Research Achievements

Plants symbiose with arbuscular mycorrhizal fungi (AMF) in their roots to efficiently absorb soil nutrients, and this symbiosis repeatedly "develops" and "collapses. This study has focused on the molecular mechanism of the "development" and "collapse" cycles over a short period of a few days, but we also considered "development" and "collapse" over a longer time span. In other words, in addition to the growth stages of young seedlings, we also included the flowering stage, the seedling ripening stage, winter grasses other than crops (winter grasses: weeds), and dead roots in our analysis. Surprisingly, we found a mycorrhizal fungus with an colonization cycle opposite to that of normal AMF.

Free Research Field

土壌肥料学

Academic Significance and Societal Importance of the Research Achievements

これまでの一般的な菌根菌がコインの表だとすれば、本研究で見出した菌根菌は裏面である。時間あるいは日単位で考えていた菌根の共生サイクルが、もっと長い時間軸で調べられなければ、実際の農業の生産現場には、実践的に応用できない可能性がある。とくに、化学肥料や農薬の使用を前提とする慣行的な農業を見直し、これからの持続的で低投入型の農業を実践するためには、本研究で明らかとなった、有機的で、低投入の圃場における生態システムの理解が今後一層必要になる。