ArticlePlant physiology1999
K+-Selective inward-rectifying channels and apoplastic pH in barley roots
Article in Plant physiology, 1999. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.
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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
18 citing papers in PubMed, 67 citations in OpenAlex.
- Arabidopsis COP1 guides stomatal response in guard cells through pH regulation.Communications biology · 2024Article
- How Plants Tolerate Salt Stress.Current issues in molecular biology · 2023Review
- Integrated physiological and transcriptional dissection reveals the core genes involving nutrient transport and osmoregulatory substance biosynthesis in allohexaploid wheat seedlings under salt stress.BMC plant biology · 2022Article
- Article
- Membrane voltage as a dynamic platform for spatiotemporal signaling, physiological, and developmental regulation.Plant physiology · 2021Article
- The Integration of Electrical Signals Originating in the Root of Vascular Plants.Frontiers in plant science · 2017Article
- Plant Survival in a Changing Environment: The Role of Nitric Oxide in Plant Responses to Abiotic Stress.Frontiers in plant science · 2015Review
- Analysis of the Root System Architecture of Arabidopsis Provides a Quantitative Readout of Crosstalk between Nutritional Signals.The Plant cell · 2014Article
- Changes in external pH rapidly alter plant gene expression and modulate auxin and elicitor responses.Plant, cell & environment · 2010Article
- Learning from evolution: Thellungiella generates new knowledge on essential and critical components of abiotic stress tolerance in plants.Molecular plant · 2009Review
- Emergence of a novel calcium signaling pathway in plants: CBL-CIPK signaling network.Physiology and molecular biology of plants : an international journal of functional plant biology · 2008Article
- Boron tolerance in barley is mediated by efflux of boron from the roots.Plant physiology · 2004Article
- The spatially variable inhibition by water deficit of maize root growth correlates with altered profiles of proton flux and cell wall pH.Plant physiology · 2004Article
- Potassium and carrot embryogenesis: are K+ channels necessary for development?Plant molecular biology · 2004Article
- Opposing effects of aluminum on inward-rectifier potassium currents in bean root-tip protoplasts.The Journal of membrane biology · 2004Article
- Characterization of whole-cell K+ currents across the plasma membrane of pollen grain and tube protoplasts of Lilium longiflorum.The Journal of membrane biology · 2003Article
- A patch-clamp study on the physiology of aluminum toxicity and aluminum tolerance in maize. Identification and characterization of Al(3+)-induced anion channels.Plant physiology · 2001Article
- High-affinity potassium transport in barley roots. Ammonium-sensitive and -insensitive pathways.Plant physiology · 2000Article
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
Recent structure-function analysis of heterologously expressed K+-selective inward-rectifying channels (KIRCs) from plants has revealed that external protons can have opposite effects on different members of the same gene family. An important question is how the diverse response of KIRCs to apoplastic pH is reflected at the tissue level. Activation of KIRCs by acid external pH is well documented for guard cells, but no other tissue has yet been studied. In this paper we present, for the first time to our knowledge, in planta characterization of the effects of apoplastic pH on KIRCs in roots. Patch-clamp experiments on protoplasts derived from barley (Hordeum vulgare) roots showed that a decrease in external pH shifted the half-activation potential to more positive voltages and increased the limit conductance. The resulting enhancement of the KIRC current, together with the characteristic voltage dependence, strongly relates the KIRC of barley root cells to AKT1-type as opposed to AKT3-type channels. Measurements of cell wall pH in barley roots with fluorescent dye revealed a bulk apoplastic pH close to the pK values of KIRC activation and significant acidification of the apoplast after the addition of fusicoccin. These results indicate that channel-mediated K+ uptake may be linked to development, growth, and stress responses of root cells via the activity of H+-translocating systems.
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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.