Induction of Ferric Reductase Activity and of Iron Uptake Capacity in Chlorococcum littorale Cells under Extremely High-CO_2 and Iron-Deficient Conditions

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概要

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• The marine green alga, Chlorococcum littorale, accumulated iron in its cells and showed high activity of plasma membrane ferric reductase under high-CO_2 and iron-deficient conditions. These activities disappeared upon exposure to ordinary air and by adding excess FeSO_<4->. The iron uptake had high affinity for the Fe(II) form (K_m of 0.13 μM). Carbonylcyanide m-chlorophenylhydrazone and N, N-dicyclohexylcarbodiimide significantly suppressed the iron uptake, suggesting that the Fe(II) uptake was driven by ATPase. These results indicate that high CO_2 and iron deficiency cooperatively induce the Fe(II) uptake and cell-surface ferric reductase activity.

• 日本植物生理学会の論文

著者

• Sasaki T

  Ajinomoto Co.

• Sasaki Takuji

  Rgp Niar

• Miyachi S

  Marine Biotechnology Inst. Kamaishi Lab. Iwate Jpn

• KURANO NORIHIDE

  Marine Biotechnology Institute, Kamaishi Laboratories

• MIYACHI SHIGETOH

  Marine Biotechnology Institute

• Kurano Norihide

  Marine Biotech. Inst.:kamaishi Labs.:shimizu Labs.

• Kurano N

  Marine Biotechnology Inst. Kamaishi Lab. Iwate Jpn

• Sasaki Takaaki

  Ajinomoto Co.

• Sasaki T

  Rgp Niar

• Sasaki Takayuki

  Marine Biotechnology Institute, Kamaishi Laboratories

• Kurano N

  Osaka Municipal Technical Research Institute

• Miyachi Sigetoh

  Marine Biotechnology Institute Kamaishi Laboratories

• Miyachi Shigetoh

  Marine Biotechnology Inst.

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