ArticleThe Journal of membrane biology1995
Hodgkin-Huxley analysis of a GCAC1 anion channel in the plasma membrane of guard cells.
Article in The Journal of membrane biology, 1995. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
What it found
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Who cites it
6 citing papers in PubMed, 33 citations in OpenAlex.
- Chloride as a Beneficial Macronutrient in Higher Plants: New Roles and Regulation.International journal of molecular sciences · 2019Review
- Illumination/Darkness-Induced Changes in Leaf Surface Potential Linked With Kinetics of Ion Fluxes.Frontiers in plant science · 2019Article
- Rethinking Guard Cell Metabolism.Plant physiology · 2016Review
- Molecular Evolution of Slow and Quick Anion Channels (SLACs and QUACs/ALMTs).Frontiers in plant science · 2012Article
- A special pair of phytohormones controls excitability, slow closure, and external stomach formation in the Venus flytrap.Proceedings of the National Academy of Sciences of the United States of America · 2011Article
- A transient outward-rectifying K+ channel current down-regulated by cytosolic Ca2+ in Arabidopsis thaliana guard cells.Proceedings of the National Academy of Sciences of the United States of America · 1998Article
Corrections and comments
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
A quantitative analysis of the time- and voltage-dependent kinetics of the Guard Cell Anion Channel (GCAC1) current in guard cell protoplasts from Vicia faba was analyzed using the whole-cell patch clamp technique. The voltage-dependent steady-state activation of GCAC1 current followed a Boltzmann distribution. For the corresponding steady-state value of the activation variable a power of two was derived which yielded suitable fits of the time course of voltage-dependent current activation. The GCAC1 mediated chloride current could successfully be described in terms of the Hodgkin-Huxley equations commonly evoked for the Na channel in nerve. After step depolarizations from a potential in the range of the resting potential to potentials above the equilibrium potential for chloride an activation and also an inactivation could be described. The gating of both processes exhibited an inverse relationship on the polarity of the applied step potentials in the order of milliseconds. Deactivating tail currents decline exponentially. The presented analysis contributes to the understanding of the rising phase of the observed action potentials in guard cells of V. faba. Evidence is presented that the voltage-dependent kinetic properties of the GCAC1 current are different from those properties described for the excitable anion currents in the plasmalemma of Chara corallina (Beilby & Coster, 1979a).
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.