ArticlePlant physiology2001
Extracellular protons inhibit the activity of inward-rectifying potassium channels in the motor cells of Samanea saman pulvini.
Article in Plant physiology, 2001. 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, 28 citations in OpenAlex.
- AKT5 is a bona fide potassium channel and controls petiole growth inScience advances · 2026Article
- Bioorganic studies on the nyctinastic leaf-movement of plants.Proceedings of the Japan Academy. Series B, Physical and biological sciences · 2026Review
- Compensation between FOXP transcription factors maintains proper striatal function.Cell reports · 2024Article
- Compensation between FOXP transcription factors maintains proper striatal function.bioRxiv : the preprint server for biology · 2023Article
- 12-Hydroxyjasmonic acid glucoside causes leaf-folding of Samanea saman through ROS accumulation.Scientific reports · 2022Article
- Biologically active and antimicrobial peptides from plants.BioMed research international · 2015Review
- 12-hydroxyjasmonic acid glucoside is a COI1-JAZ-independent activator of leaf-closing movement in Samanea saman.Plant physiology · 2011Article
- Phosphatidylinositol (4,5)bisphosphate inhibits K+-efflux channel activity in NT1 tobacco cultured cells.Plant physiology · 2009Article
- In planta AKT2 subunits constitute a pH- and Ca2+-sensitive inward rectifying K+ channel.Planta · 2007Article
- Microautoradiographic localisation of [3H]sucrose and [3H]mannitol in Robinia pseudoacacia pulvinar tissues during phytochrome-mediated nyctinastic closure.Protoplasma · 2006Article
- Diurnal and circadian regulation of putative potassium channels in a leaf moving organ.Plant physiology · 2002Article
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
The intermittent influx of K+ into motor cells in motor organs (pulvini) is essential to the rhythmic movement of leaves and leaflets in various plants, but in contrast to the K+ influx channels in guard cells, those in pulvinar motor cells have not yet been characterized. We analyzed these channels in the plasma membrane of pulvinar cell protoplasts of the nyctinastic legume Samanea saman using the patch-clamp technique. Inward, hyperpolarization-activated currents were separated into two types: time dependent and instantaneous. These were attributed, respectively, to K+ -selective and distinctly voltage-dependent K(H) channels and to cation-selective voltage-independent leak channels. The pulvinar K(H) channels were inhibited by external acidification (pH 7.8-5), in contrast to their acidification-promoted counterparts in guard cells. The inhibitory pH effect was resolved into a reversible decline of the maximum conductance and an irreversible shift of the voltage dependence of K(H) channel gating. The leak appeared acidification insensitive. External Cs (10 mM in 200 mM external K+) blocked both current types almost completely, but external tetraethylammonium (10 mM in 200 mM external K+) did not. Although these results do not link these two channel types unequivocally, both likely serve as K+ influx pathways into swelling pulvinar motor cells. Our results emphasize the importance of studying multiple model systems.
Indexed as
Identifiers
11706209PMC129298W2086730727What 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.