| Project/Area Number |
10680529
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
環境影響評価(含放射線生物学)
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| Research Institution | National Institute for Environmental Studies |
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Principal Investigator |
KASAI Fumie National Institute for Environmental Studies, Environmental Biology Division, Leader, 生物圏環境部, 室長 (70224376)
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| Project Period (FY) |
1998 – 2000
|
| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2000: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1999: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1998: ¥1,700,000 (Direct Cost: ¥1,700,000)
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| Keywords | Closterium / Microalgae / Environmental stress / Genetic variation / Allozyme / マイクロサテライト |
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| Research Abstract |
Genetic diversity of a population is considered as one of the factors which determine whether or not organisms could conquer anthropogenic environmental stresses.
Maintenance of genetic variations in populations is affected by the source of variation and population size. In this study. I examined genetic variation in local populations of the conjugating green alga Closterium ehrenbergii isolated from paddy fields, where herbicides were assumed to be applied, and from other shallow water pools like ponds and lowland wetlands, where herbicides were not assumed to be applied. Allozyme variation was observed in the populations isolated from lowLand wetlands in Okinawa lsl. , whereas the variation was not observed in the populations isolated from paddy fields in Yaeyama lsls, where herbicides were assumed to be applied. These results suggest that an environmental stress like a herbicide could reduce genetic variation in microalgal populations.
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