The growth and heavy metal experiments revealed oppositive interactions between toxic metals(Zn and Cd) and Mn when the coastal diatom T. pseudonana were used. Cd and Zn inhibited the algal growth rate only at low Mn ion concentrations and this effect could be accounted for an inhibition of cellular Mn take by the toxic metals. Mn and Zn inhibited cellular Cd take and this indicated a reciprocal effects among the metals with respect to metal take. Saturation kinetics modeling of the take data was consistent with two metals competing with each other for binding to the Mn take system and with both Cd and Mn being transported into the cell by that system. Mathematical modeling of Mn and Cd take data revealed evidence for a Cd efflux system.

• 박흥재(인제대학교 환경시스템학부) | Heung-Jai Park
• 김성미(마산대 임상병리과) | Seong-Mi Kim
• 정성욱(인제대학교 환경시스템학부) | Seong-Ug Jeong
• 김정호(경산대학교 환경학부) | Jung-Ho Kim
• 이봉헌(부산대학교 화학과) | Bong-Hun Lee Corresponding Author