The action potential of Dionaea muscipula Ellis

  title={The action potential of Dionaea muscipula Ellis},
  author={Dieter Hodick and Andreas Sievers},
The intention of this investigation was to acquire more concise information about the nature of the action potential of Dionaea muscipula Ellis and the different types of cells generating and conducting it. It is shown by microelectrode measurements that, besides the sensory cells, all the major tissues of the trap lobes are excitable, firing action potentials with pronounced after-hyperpolarizations. The action potentials are strictly dependent on Ca2+. Their peak depolarizations are shifted… 
Cyclopiazonic acid disturbs the regulation of cytosolic calcium when repetitive action potentials are evoked in Dionaea traps
The effect of CPA on the AP amplitude indicates that CPA inhibits the sequestration of Ca2+ in Dionaea cells.
Effects of ion channel inhibitors on cold- and electrically-induced action potentials in Dionaea muscipula
During excitation Dionaea muscipula relied upon the calcium influxes from both the extra- and intracellular compartments, and Lanthanum ions significantly inhibited both cold- and DC-induced membrane potential changes.
On the mechanism of trap closure of Venus flytrap (Dionaea muscipula Ellis)
These experiments make it very likely that the mesophyll cells are already extensible but are kept compressed in the open trap, thus developing tissue tension.
Rapid plant movements triggered by action potentials
  • T. Sibaoka
  • Biology
    The botanical magazine = Shokubutsu-gaku-zasshi
  • 2006
Rapid bendings of the pulvinus inMimosa pudica, of the trap lobes inDionaea muscipula andAldrovanda vesiculosa, and of the tentacle in Drosera are triggered by action potentials in their motor cells.
Kinetics and Mechanism of Dionaea muscipula Trap Closing1[C][OA]
The cumulative character of electrical stimuli points to the existence of electrical memory in the Venus flytrap and the observed fast movement can be explained by the hydroelastic curvature model without invoking buckling instability.
Electrotonic and action potentials in the Venus flytrap.
Light- and dark-induced action potentials in Physcomitrella patens
During light- dark-induced excitation of Physcomitrella patens, APs might rely upon calcium influxes from the intracellular compartments, and were not blocked by the proton pump inhibitors (DES, DCCD), although the resting potential (RP) diminished significantly.


The influence of Ca2+ on the action potential in mesophyll cells ofDionaea muscipula Ellis
The influence of different ions on the action potential of Dionaea muscipula was measured by impaling microelectrodes into mesophyll cells of small leaf stripes which carried a trigger hair and elicited by bending the hair.
Cell exposure to solutions containing 10 mm KCl caused the potential to depolarize in two steps, and it is suggested that the second step was caused by the opening of K(+) -channels in the membrane, which lowered the resistance and provided a current pathway that partially short-circuited the electrogenic pump.
Control of membrane potential and excitability ofChara cells with ATP and Mg2+
The ineffectiveness of an ATP analog, AMP-PNP, and the synergism of ATP and Mg2+ in maintaining the membrane potential and excitability strongly suggest that ATP act via its hydrolysis by M g2+-activated ATPase.
Correlation of Adenosine Triphosphate Levels in Chara corallina with the Activity of the Electrogenic Pump.
The effect of a number of inhibitors on the ATP level in single cells of Chara corallina has been measured using the luciferin-luciferase assay, and the effects of these inhibitors are consistent with the plasmalemma containing an ATP-dependent electrogenic pump that provides the primary conductance through the membrane.
The role of protons in determining membrane electrical characteristics inChara corallina
SummaryThe value of the potential difference between the vacuole and the external medium,ψvo, and the effects of metabolic inhibitors upon it indicate that, under certain external conditions, there
Effect of ionic environment on the response of the sensory hair of Venus's-flytrap
The cellular resting potential and the electrical response to mechanical stimulation were measured and the amplitude of the response potential was affected by all of the ions tested except sodium.
The Closing Response in Dionaea
The closing response in Dionaea depends upon the intensity rather than upon the number of stimuli, the number of stimuli required varying in the inverse order of their intensity. Response is normally
Demonstration and characterization of Ca2+ channel in tonoplast-free cells ofNitellopsis obtusa
It is concluded that only the Ca2+ channel is activated during plasmalemma excitation in tonoplast-free cells, and Ca2- channel activation seems to be enhanced by increasing external ionic strength.
Generation of action potentials in Chara corallina by turgor pressure changes
The pressure-induced action potentials are explained in terms of an electro-mechanical compression (or expansion) of a local membrane area and discussed in their relevance to the propagation of pressure signals in response to water and salt stress in higher plants.
Ionic Relations of Cells of Chara Australis V. The Action Potential
When the concentration of calcium ions in the external medium was changed by replacement with magnesium ions, keeping the total concentration constant, the peak level of the action potential changed reversibly.