A mathematical model of action potential in cells of vascular plants.
A mathematical model of action potential (AP) in vascular plants cells has been worked out. The model takes into account actions of plasmalemma ion transport systems (K(+), Cl(-) and Ca(2+) channels; H(+)- and Ca(2+)-ATPases; 2H(+)/Cl(-) symporter; and H(+)/K(+) antiporter), changes of ion concentrations in the cell and in the extracellular space, cytoplasmic and apoplastic buffer capacities and the temperature dependence of active transport systems. The model of AP simulates a stationary level of the membrane potential and ion concentrations, generation of AP induced by electrical stimulation and gradual cooling and the impact of external Ca(2+) for AP development. The model supports a hypothesis about participation of H(+)-ATPase in AP generation.
Sukhov
Vladimir
V
Department of Biophysics, N.I. Lobachevsky State University of Nizhny Novgorod, Gagarin Avenue, 23, Nizhny Novgorod 603950, Russia. vssuh@mail.ru
Vodeneev
Vladimir
V
D000200:Action Potentials / Q000502:physiology*; D017920:Antiporters / Q000502:physiology; D015220:Calcium Channels / Q000502:physiology; D000252:Calcium-Transporting ATPases / Q000502:physiology; D018118:Chloride Channels / Q000502:physiology; D008564:Membrane Potentials / Q000502:physiology; D008954:Models, Biological; D018521:Plant Physiological Phenomena; D010944:Plants; D015221:Potassium Channels / Q000502:physiology; D027961:Potassium-Hydrogen Antiporters / Q000502:physiology; D006180:Proton-Translocating ATPases / Q000502:physiology
D017920:Antiporters; D015220:Calcium Channels; D018118:Chloride Channels; D015221:Potassium Channels; D027961:Potassium-Hydrogen Antiporters; C114260:hydrogen-chloride symporter; D006180:Proton-Translocating ATPases; D000252:Calcium-Transporting ATPases