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Recording Temperature-induced Neuronal Activity through Monitoring Calcium Changes in the Olfactory Bulb of Xenopus laevis
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Low-temperature induced transmembrane potential changes in the liverwort Conocephalum conicum.

Elzbieta Krol1, Halina Dziubinska, Kazimierz Trebacz

  • 1Department of Biophysics, Institute of Biology, Maria Curie-Sklodowska University, Akademicka 19, 20-033 Lublin, Poland. krolik@biotop.umcs.lublin.pl

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Summary
This summary is machine-generated.

Sudden cold triggers action potentials and voltage transients in liverworts. These electrical signals involve calcium influx from both external and internal cellular stores.

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Area of Science:

  • Plant electrophysiology
  • Cellular signaling

Background:

  • Liverworts exhibit electrical excitability.
  • Environmental stressors can induce cellular responses.

Purpose of the Study:

  • To investigate the mechanism of electrical signal generation in liverworts upon cold shock.
  • To elucidate the role of calcium ions in temperature-induced electrical responses.

Main Methods:

  • Intracellular microelectrode recordings in Conocephalum conicum.
  • Pharmacological manipulation of ion channels and calcium signaling pathways.
  • Application of cold stimuli and varying ion concentrations.

Main Results:

  • Cold stimuli evoked all-or-none action potentials and non-propagating voltage transients.
  • Calcium influx from external and internal stores was essential for signal generation.
  • Inhibition of calcium channels and phospholipase C reduced signal amplitudes.

Conclusions:

  • Temperature drops induce calcium-dependent electrical activity in liverworts.
  • Both plasma membrane calcium influx and internal calcium release contribute to these responses.