Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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Outline of Final Research Achievements |
The characteristics of Fe oxides formed during the growth of Gallionella-related Fe-oxidizing bacteria and dynamics of Gallionella-related Fe-oxidizing bacterial community in paddy field soils were studied to understand the role and significance of them in the Fe oxidizing process in paddy field soil. The microscopic observations and XAFS analysis showed that Gallionella-related Fe-oxidizing bacteria produced ferrihydrite-predominated iron oxides during the growth, some of which produce dendrite structures of Fe oxides. The community analysis showed that the dynamics of Gallionella-related Fe-oxidizing bacterial community changed depending on the redox cycle of Fe in paddy soils. These results suggested that Gallionella-related Fe-oxidizing bacteria are involved in the Fe-oxidizing process in paddy field soil, and their behavior may influence the dynamics of not only Fe but also other elements in the soil.
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