In: General Physiology and Biophysics, vol. 30, no. 1
Renata Kurtyka - Zbigniew Burdach - Waldemar Karcz
Detaily:
Rok, strany: 2011, 52 - 58
O článku:
The effects of Cd and Pb on membrane potential (Em ) and photoelectric reaction of Nitellopsis obtusa cells were investigated. It was found that Cd and Pb at 1.0 mM caused a depolarization of the Em , whereas both metals at lower concentrations changed the Em in a different way. Pb at 0.1 mM and 0.01 mM hyperpolarized the Em , whereas Cd at the same concentrations depolarized and did not change the Em , respectively. In the presence of 0.01 mM Pb, the light-induced hyperpolarization of the Em was by 18% higher as compared to the control, whereas at 1.0 mM Pb it was by 40% lower. Pb at 0.1 mM and Cd at 0.01 mM or 5 × 0.01 mM did not change the light-induced membrane hyperpolarization. However, in the presence of Cd at 0.1 mM and 1.0 mM this hyperpolarization was 2-fold lower or was completely abolished, respectively. These results suggest that at high Cd and Pb concentrations both depolarization of the Em and decrease of light-induced membrane hyperpolarization in Nitellopsis obtusa cells are probably due to inhibition of the plasma membrane H+-ATPase activity, whereas both metals at lower concentrations differ in mechanism of membrane potential changes.
Ako citovať:
ISO 690:
Kurtyka, R., Burdach, Z., Karcz, W. 2011. Effect of cadmium and lead on the membrane potential and photoelectric reaction of Nitellopsis obtusa cells. In General Physiology and Biophysics, vol. 30, no.1, pp. 52-58. 0231-5882.
APA:
Kurtyka, R., Burdach, Z., Karcz, W. (2011). Effect of cadmium and lead on the membrane potential and photoelectric reaction of Nitellopsis obtusa cells. General Physiology and Biophysics, 30(1), 52-58. 0231-5882.