| Project/Area Number |
24510103
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Environmental technology/Environmental materials
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| Research Institution | The University of Shiga Prefecture |
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Principal Investigator |
HARADA Emiko 滋賀県立大学, 環境科学部, 准教授 (20232845)
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| Co-Investigator(Kenkyū-buntansha) |
長谷川 博 滋賀県立大学, 環境科学部, 名誉教授 (00090457)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2012: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
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| Keywords | オオカナダモ / 重金属集積植物 / 水生植物 / セシウム / ファイトマイニング / ファイトレメディエーション / 放射光蛍光Ｘ線分析 / マンガン / バイオミネラリゼーション / シアノバクテリア / メタロミクス / 沈水植物 / 重金属 |
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| Outline of Final Research Achievements |
Here we report cesium (Cs) and manganese (Mn) accumulation of Egeria densa plants, potential biosorbents to extract toxic or valuable metals from the environment. Plants, waters, and sediments were collected in Fukushima Prefecture. The radiocesium was measured using a germanium semiconductor detector. The two-dimensional metal distribution of leaves showed the predominant localization of Cs in the cell wall or apoplastic regions, suggesting the possible absorption mechanism of Cs in the plants. In order to investigate Mn accumulation in E. densa, plants were collected in a circular drainage canal in a settlement at the eastern side of Lake Biwa. The plants contained 18000 ppm of Mn, above the hyperaccumulation level as 10000 ppm. Mn contents in plants were remarkably higher between spring and summer than in autumn. The presence of Mn oxides on the leaves suggests that the epidermal bacterial flora affects the metal accumulation in aquatic plants.
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