Effect of predatory protists on root endophytes and rice plant growth
| 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 2022)
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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 / 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 |
Since Protists are overlooked in paddy field soil and mostly neglected in soil microbiology studies, I wrote two review articles focusing on protists to highlight their importance in the paddy field soil ecosystem. The first review article was written to highlight the research needs and discuss potential research ideas on biochar–protist interaction, which would advance our knowledge of biochar–microbe interaction. This article was published in the top journal of the Soil Science category, Biochar. This 2nd review highlights the essential roles of protists in a wetland rice field soil and the need for further research to fill the gaps in knowledge regarding the diversity and functions of the protists in this unique agroecosystem. In another study, we focused on the effects of protists on active bacterial communities in paddy field soils, which was recently published in one of the top journals of Soil Science, Biology and Fertility of Soils. Since one of the aims of this project is to understand protist-endophytic bacteria interaction, we made research aiming to investigate the effects of soil as a microbial source on the assemblage of the endophytic bacterial communities in rice roots, which was recently published in Biology and Fertility of Soils. Although not yet published, we have finished 2 more studies. One study focused on the effect of nitrogen-based fertilizers on protist communities, which was awarded "Excellent Poster Presentation Award" by the scientific committee of the KAAB International Symposium 2023.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
So far, we have published 4 papers and currently 2 studies is almost finished. The manuscripts are in progress and we plant ro submit the two articles within this year. The main research focusing on protist - endophyte interaction is going smoothly.
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| Strategy for Future Research Activity |
We are planning to submit two studies within this year. In addition, our research showed that protists enhance endophytic bacterial communities. We are planning to conduct new studies to understand the mechanism behind this.
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Report
(1 results)
Research Products
(6 results)
