2023 Fiscal Year Final Research Report
Investigation of the relationship between bacterial surface roughness and marine nanoparticle attachment
| Project/Area Number |
20K19960
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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 63010:Environmental dynamic analysis-related
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| Research Institution | Japan Agency for Marine-Earth Science and Technology (2022-2023)
Okinawa Institute of Science and Technology Graduate University (2020-2021) |
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Principal Investigator |
YAMADA Yosuke 国立研究開発法人海洋研究開発機構, 超先鋭研究開発部門(高知コア研究所), 研究員 (80773720)
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| Project Period (FY) |
2020-04-01 – 2024-03-31
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| Keywords | 海洋細菌 / ナノサイズ粒子 / 表面性状 |
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| Outline of Final Research Achievements |
This research has been conducted with the main objective of deepening the understanding of the utilization and decomposition processes of bacterial organic matter, a key process in the marine carbon cycle, by elucidating in detail the relationship between bacterial surface roughness and the attachment of nano-sized particles. Particularly important findings have been obtained in two areas, some of which have been published (Yamada et al. 2023). 1) It has been revealed that bacterial surface roughness varies depending on the bacterial species, and there are differences in the attachment of nano-sized particles to these bacteria depending on the type of particle. 2) Among the environmental factors, water temperature and nutrient concentration have been identified as major factors influencing bacterial surface roughness variations. Further analysis will be conducted to aim for a more universal understanding of the mechanisms underlying bacterial and nano-sized particle attachment.
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| Free Research Field |
環境動態解析
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| Academic Significance and Societal Importance of the Research Achievements |
本研究はこれまでほとんど調査がされていなかった海洋細菌の表面性状に着目し、その性状把握と海洋物質循環に与える影響解明を目指した研究である。本研究により、海洋細菌の表面粗さが水温や細菌種などによって大きく異なり、ナノサイズ粒子の付着にも影響していることが明らかになった。本発見は海洋細菌に限らず、湖沼や生体内に生息する細菌にも応用できる可能性があり、普遍的な細菌生態現象の解明にもつながるかもしれない。今後はその応用の可否や海洋物質循環への影響をより深く追究することで、将来の気候変動に伴う海洋応答予測の高精度化につながる可能性も秘めている。
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