| Project/Area Number |
22K14804
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 38010:Plant nutrition and soil science-related
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| Research Institution | Niigata University |
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Principal Investigator |
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| Project Period (FY) |
2022-04-01 – 2025-03-31
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| Project Status |
Granted (Fiscal Year 2023)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2024: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | Protists / Plant-microbe / microbial ecology / paddy field / predators / protists / prey-predator / plant growth / trophic interaction / protozoa / 原生生物 / 根内生細菌 / イネ / 捕食性原生生物 |
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| Outline of Research at the Start |
捕食性原生生物（以下、原生生物）は細菌を捕食して細菌群集を変化させ、土壌中の栄養循環を促進し、植物の成長を促進する。これまでの研究では、原生生物と根圏細菌の相互作用（群集構造や機能性の変化）にのみ焦点があてられていた。しかし我々の最近の研究で、原生生物の存在下においては植物根の内生細菌の群集組成もが変化し、コロニー形成が促進されることが確認された。本研究では、原生生物の存在がどうして根内生細菌の個体数を増加させるのかを明らかにすることを第一の目的とし、原生生物による制御によって根内生細菌の機能性、特に植物成長促進効果にどの程度影響を与えるのかを調べることを第二の目的とする。
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| Outline of Annual Research Achievements |
The main part of the project in which we focused on the effects of protists on the root endophytic bacterial communities is completed and the manuscript is submitted to a scientific journal. We showed that microbial predators modulated endophytic communities, which originated in the rhizosphere soil. The modulation of endophytes followed chaotic patterns triggered by changes in the dilution rates of the soil nutrients. Furthermore, the presence of predators enhanced the root colonization of endophytes. Our findings identify a novel key mechanism for the modulation of endophytes and enhance understanding of underground plant-microbe interaction.In addition, our side studies that related to this project produced 4 articles in top journals of soil science.
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| Current Status of Research Progress |
Current Status of Research Progress
1: Research has progressed more than it was originally planned.
Reason
We have achieved the majority of our aims in this project so far and majority of the work is done. Everything went smoothly and the article including our major goal is currently submitted to a scientific journal.
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| Strategy for Future Research Activity |
Although the major part is completed, we still need to make some confirmative experiments. So in the last year of the project we will complete the experiments and finalize the project.
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