| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Outline of Final Research Achievements |
In microbial ecosystems, the hypotheses of environmental selection and dispersal limitation are the most likely explanations for how new ecosystems form. However, the interactions between these two phenomena are not well characterized. To test the “everything is everywhere but the environments select” hypothesis, mercury resistant spore-forming Bacilli were isolated from different geographical regions in order to understand the dissemination of mercury resistance transposons across related Bacilli genera. Tn5084, originally identified from B. cereus strain RC607 from the USA, is identified from Bacillus isolated from Asia and Europe. Newly identified transposons Tn6294 and TndMER3 were also identified in soils from different continents. The Soil cultivation with mercury containing media leads to the enhancement of mer genes. The results obtained here indicated that the horizontal dissemination of mercury resistance transposons in the Bacilli.
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