ArticlePlanta1993
Comparison of K(+)-channel activation and deactivation in guard cells from a dicotyledon (Vicia faba L.) and a graminaceous monocotyledon (Zea mays).
Article in Planta, 1993. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
11 citing papers in PubMed, 44 citations in OpenAlex.
- Speedy stomata of a CPlant, cell & environment · 2024Article
- Two calcium-dependent protein kinases enhance maize drought tolerance by activating anion channel ZmSLAC1 in guard cells.Plant biotechnology journal · 2022Article
- Regulation by external K+ in a maize inward shaker channel targets transport activity in the high concentration range.The Plant cell · 2005Article
- Extracellular protons inhibit the activity of inward-rectifying potassium channels in the motor cells of Samanea saman pulvini.Plant physiology · 2001Article
- 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
- Hodgkin-Huxley analysis of a GCAC1 anion channel in the plasma membrane of guard cells.The Journal of membrane biology · 1995Article
- Inward rectifier potassium channels in plants differ from their animal counterparts in response to voltage and channel modulators.European biophysics journal : EBJ · 1995Article
- Properties of the K+ inward rectifier in the plasma membrane of xylem parenchyma cells from barley roots: effects of TEA+, Ca2+, Ba2+ and La3+.The Journal of membrane biology · 1994Article
- Ion channels in the plasma membrane of protoplasts from the halophytic angiosperm Zostera muelleri.The Journal of membrane biology · 1994Article
- Pump and K+ inward rectifiers in the plasmalemma of wheat root protoplasts.The Journal of membrane biology · 1994Article
- Hodgkin-Huxley analysis of whole-cell outward rectifying K(+)-currents in protoplasts from tobacco cell suspension cultures.The Journal of membrane biology · 1993Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
2 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
We describe and compare inward and outward whole-cell K(+) currents across the plasma membrane surrounding guard-cell protoplasts from the dicotyledon, Vicia faba, and the graminaceous monocotyledon, Zea mays. Macrosopic whole-cell current is considered in terms of microscopic single-channel activity, which involves discrete steps between conducting (open) and nonconducting (closed) states of the channel protein. Kinetic equations are used to model the number of open and closed states for channels conducting K(+) influx (K(in)) and K(+) efflux (K(out)) in the two species, and to calculate the rate at which open-closed transitions occur. The opening and closure of K(in) channels in both Vicia and Zea follow single-exponential timecourses, indicating that K(in)-channel proteins in each species simply fluctuate between one open and one closed state. In both species, opening of K(in) channels is voltage-independent, but closure of K(in) channels is faster at more positive membrane potentials. In response to identical voltage stimuli, K(in) channels in Zea open and close approximately three times as fast as in Vicia. In contrast to K(in), K(out) channels in Zea open and close more slowly than in Vicia. The closure of K(out) channels follows a single-exponential timecourse in each species, indicating one open state. The kinetics of K(out)-channel opening are more complicated and indicate the presence of at least two (Vicia) or three (Zea) closed states.
Identifiers
What OpenQuestion holds
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.