ArticlePlant physiology2000
Blue light activates potassium-efflux channels in flexor cells from Samanea saman motor organs via two mechanisms.
Article in Plant physiology, 2000. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.
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Who cites it
19 citing papers in PubMed, 54 citations in OpenAlex.
- Mechanism of the Pulvinus-Driven Leaf Movement: An Overview.International journal of molecular sciences · 2024Review
- 12-Hydroxyjasmonic acid glucoside causes leaf-folding of Samanea saman through ROS accumulation.Scientific reports · 2022Article
- Effects of Supplemental Lighting on Potassium Transport and Fruit Coloring of Tomatoes Grown in Hydroponics.International journal of molecular sciences · 2021Article
- Encoding Membrane-Potential-Based Memory within a Microbial Community.Cell systems · 2020Article
- Calcium changes in Robinia pseudoacacia pulvinar motor cells during nyctinastic closure mediated by phytochromes.Protoplasma · 2019Article
- Molecular Evolution and Interaction of Membrane Transport and Photoreception in Plants.Frontiers in genetics · 2019Review
- 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
- An inositol polyphosphate 5-phosphatase functions in PHOTOTROPIN1 signaling in Arabidopis by altering cytosolic Ca2+.The Plant cell · 2008Article
- Possible involvement of phototropins in leaf movement of kidney bean in response to blue light.Plant physiology · 2005Article
- Changes in ion fluxes during phototropic bending of etiolated oat coleoptiles.Annals of botany · 2004Article
- Cell physiological aspects of the plasma membrane electrogenic H+ pump.Journal of plant research · 2003Article
- Blue light activates calcium-permeable channels in Arabidopsis mesophyll cells via the phototropin signaling pathway.Proceedings of the National Academy of Sciences of the United States of America · 2003Article
- Plasma membrane aquaporins in the motor cells of Samanea saman: diurnal and circadian regulation.The Plant cell · 2002Article
- Blue light-induced kinetics of H+ and Ca2+ fluxes in etiolated wild-type and phototropin-mutant Arabidopsis seedlings.Proceedings of the National Academy of Sciences of the United States of America · 2002Article
- Diurnal and circadian regulation of putative potassium channels in a leaf moving organ.Plant physiology · 2002Article
- Extracellular protons inhibit the activity of inward-rectifying potassium channels in the motor cells of Samanea saman pulvini.Plant physiology · 2001Article
- Potassium-efflux channels in extensor and flexor cells of the motor organ of Samanea saman are not identical. Effects of cytosolic calcium.Plant physiology · 2001Article
- Potassium-efflux channels in extensor and flexor cells of the motor organ of Samanea saman are not identical. Effects of cytosolic calcium.Plant physiology · 2000Article
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Authors and funding
3 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Light-induced leaflet movement of Samanea saman depends on the regulation of membrane transporters in motor cells. Blue light (BL) stimulates leaflet opening by inducing K(+) release from the flexor motor cells. To elucidate the mechanism of K(+)-efflux (K(D))-channel regulation by light, flexor motor cell protoplasts were patch-clamped in a cell-attached configuration during varying illumination. Depolarization elicited outward currents through single open K(D) channels. Changes in cell membrane potential (E(M)) were estimated by applying voltage ramps and tracking the change of the apparent reversal potential of K(D)-channel current. BL shifted E(M) in a positive direction (i.e. depolarized the cell) by about 10 mV. Subsequent red light pulse followed by darkness shifted E(M) oppositely (i.e. hyperpolarized the cell). The BL-induced shifts of E(M) were not observed in cells pretreated with a hydrogen-pump inhibitor, suggesting a contribution by hydrogen-pump to the shift. BL also increased K(D)-channel activity in a voltage-independent manner as reflected in the increase of the mean net steady-state patch conductance at a depolarization of 40 mV relative to the apparent reversal potential (G(@40)). G(@40) increased by approximately 12 pS without a change of the single-channel conductance, possibly by increasing the probability of channel opening. Subsequent red-light and darkness reversed the change in G(@40). Thus, K(+) efflux, a determining factor for the cell-volume decrease of flexor cells, is regulated by BL in a dual manner via membrane potential and by an independent signaling pathway.
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