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Effect of minerals on accumulation of Cs by fungus ${{it Saccaromyces cerevisiae}}$

酵母へのCs濃集に対する鉱物の影響

大貫 敏彦; 坂本 文徳; 山崎 信哉*; 香西 直文; 塩津 弘之; 宇都宮 聡*; 渡辺 直子*; 小崎 完*

Onuki, Toshihiko; Sakamoto, Fuminori; Yamasaki, Shinya*; Kozai, Naofumi; Shiotsu, Hiroyuki; Utsunomiya, Satoshi*; Watanabe, Naoko*; Kozaki, Tamotsu*

酵母へのCsの吸着に関して、培地中に存在する鉱物の影響を調べた。その結果、鉱物の存在は酵母へのCsの濃集を阻害した。鉱物へのCsの分配係数を調べた、分配係数が大きな鉱物の存在により、酵母へ濃集したCs濃度は少なかった。この結果から、酵母は、鉱物と競合してCsを濃集している。

The accumulation of Cs by unicellular fungus of ${{it Saccaromyces cerevisiae}}$ in the presence of minerals has been studied to elucidate the role of microorganisms in the migration of radioactive Cs in the environment. In the presence of minerals in the agar medium, the radioactivity in the yeast cells was in the order of mica $$>$$ smectite, illite $$>>$$ vermiculite, phlogopite, zeolite. This order is inversely correlated to the ratio of the concentration of radioactive Cs between the minerals and the medium solution. These results strongly suggest that the yeast accumulates radioactive Cs competitively with minerals.

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パーセンタイル:65.18

分野:Environmental Sciences

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