Complex research on the allelopathic effect of macrophytes on cyanobacteria and the effect of microplastics on macrophytes, cyanobacteria, and macrophytes allelopathy on cyanobacteria
| Project/Area Number |
21K14248
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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 22040:Hydroengineering-related
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| Research Institution | Saitama University |
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Principal Investigator |
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Project Status |
Granted (Fiscal Year 2022)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2023: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2022: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | Adsorption / Antioxidants / Macrophytes / Microplastics / Morphology / Naoplastics / Physiology / Interactions / Cyanobacteria / Oxidative stress / allelopathy / biological control / cyanobacteria / macrophytes / microplastics |
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| Outline of Research at the Start |
The allopathic suppression of cyanobacteria (Microcystis aeruginosa) by macrophytes (Egeria densa) and the influence of microplastics on both species and their allopathic interaction will be studied through laboratory and field research.
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| Outline of Annual Research Achievements |
The effect of microplastics (MPs) on the M. roraima response to M. aeruginosa exposure was studied. The effect of MPs on cyanobacteria was also tested. The adsorption of microplastics to the M. roraima roots was unchanged in M. aeruginosa co-culture compared to the monoculture. The cyanobacteria affected the growth and physiology of M. roraima than monoculture. Under the co-existence condition, M. aeruginosa growth was reduced at lower MP concentration and increased at higher concentrations. The oxidative stress increased at higher MP concentrations. Nanoplastic exposure experiments revealed that nano-plastics also have impacts on M. roraima and M. aeruginosa growth and physiology. Fieldwork found that almost all the freshwater resources we tested were contaminated with microplastics.
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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 could manage the budget to extend the experiment for the nano-plastics effect on macrophytes and microplastics. Most of the required resources for extending the research were available in the laboratory. We completed experiments with nano-plastics and filed investigations for microplastic contaminations. Currently, two manuscripts are being prepared for Microplastic's impacts on cyanobacterial allelopathy on macrophytes and the impact of microplastics on cyanobacteria.
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| Strategy for Future Research Activity |
Current findings proved that microplastics and nano plastics both have significant effects on the macrophytes, cyanobacteria, and their interactions. We want to further extend the research by applying machine learning techniques to count the number of particles attached to the tissues and to easily distinguish cyanobacteria stress response to plastic exposure. The long-duration exposure-response study is continuing as the experiment had to be repeated several times due to contaminations. Two manuscripts are under preparation and expected to publish this year.
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Report
(2 results)
Research Products
(4 results)
