Using a symbiotic system between endophytes and native microorganisms can stably suppress soil diseases.

2023 Fiscal Year Final Research Report

• Project/Area Number: 21H02191
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 39040:Plant protection science-related
• Research Institution: Ibaraki University
• Principal Investigator: Narisawa Kazuhiko 茨城大学, 農学部, 教授 (90431650)
• Co-Investigator(Kenkyū-buntansha): 坂上 伸生 茨城大学, 農学部, 准教授 (00564709) ; 晝間 敬 東京大学, 大学院総合文化研究科, 准教授 (20714504) ; 清水 将文 岐阜大学, 応用生物科学部, 准教授 (60378320)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: エンドファイト / 土着微生物 / 共生 / 土壌病害防除

Outline of Final Research Achievements

A DSE-bacteria symbiosis that enhances the effectiveness of DSE was selected. Furthermore, it was found that the inoculation of DSE and its compatible bacteria during seedling cultivation is effective. It was estimated that the inoculation of DSE and its compatible bacteria significantly promoted plant growth and increased the production of metabolic substances such as flavonoids in the plant roots.
In the seedling roots, the fungal flora in the rhizosphere was changed by treatment with C. chaetospira. Furthermore, during seedling cultivation, Cc showed a higher colonization rate than V. simplex, but in the field, Vs maintained a higher colonization rate. Fungi that grew with both DSEs, and fungi and bacteria that grew only with Vs or only with Cc were identified and listed.

Free Research Field

農学

Academic Significance and Societal Importance of the Research Achievements

単独生物に注目するのではなく、植物-DSE-バクテリアを１つの系としてとらえ、その相互作用を明らかにし、利用することで、これまで圃場での効果が不安定であった有用微生物の利用技術にブレークスルーをもたらすことが出来る。さらに、我々が菌類として認識していた生物が、生態系では、いわば菌類とバクテリアの共生体として振る舞うという、これまでの菌類学の概念を覆し、新たな生物共生系の存在を示すことになる。