ArticlePlant physiology2008
The ionic environment controls the contribution of the barley HvHAK1 transporter to potassium acquisition.
Article in Plant physiology, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.
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Who cites it
24 citing papers in PubMed.
- Positive Regulatory Roles ofPlants (Basel, Switzerland) · 2024Article
- Article
- Transcriptional and metabolic responses of apple to different potassium environments.Frontiers in plant science · 2023Article
- Proteomic Analysis of Roots Response to Potassium Deficiency and the Effect of TaHAK1-4A on KInternational journal of molecular sciences · 2022Article
- The role of PQL genes in response to salinity tolerance inPlant direct · 2021Article
- Genome-wide characterization and expression analysis of HAK K3 Biotech · 2021Article
- Corrigendum: Genome-Wide Identification and Expression Pattern Analysis of theFrontiers in genetics · 2021Article
- HvAKT2 and HvHAK1 confer drought tolerance in barley through enhanced leaf mesophyll HPlant biotechnology journal · 2020Article
- Genome-Wide Identification and Expression Pattern Analysis of theFrontiers in genetics · 2020Article
- Genome-wide analysis and identification of the low potassium stress responsive gene SiMYB3 in foxtail millet (Setariaitalica L.).BMC genomics · 2019Article
- Regulation of KFrontiers in plant science · 2019Review
- Foxtail millet SiHAK1 excites extreme high-affinity KPlant cell reports · 2018Article
- Characterization of rice KT/HAK/KUP potassium transporters and KPlant biotechnology (Tokyo, Japan) · 2018Article
- Potential Root Foraging Strategy of Wheat (Frontiers in plant science · 2018Article
- Large-scale Proteomics Combined with Transgenic Experiments Demonstrates An Important Role of Jasmonic Acid in Potassium Deficiency Response in Wheat and Rice.Molecular & cellular proteomics : MCP · 2017Article
- Article
- Molecular Cloning and Functional Analysis of a NaFrontiers in plant science · 2016Article
- Transcriptome analysis reveals dynamic changes in the gene expression of tobacco seedlings under low potassium stress.Journal of genetics · 2015Article
- Comparative analysis of potassium deficiency-responsive transcriptomes in low potassium susceptible and tolerant wheat (Triticum aestivum L.).Scientific reports · 2015Article
- Article
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7 authors.
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Abstract
The control of potassium (K+) acquisition is a critical requirement for plant growth. Although HAK1 (high affinity K+ 1) transporters provide a pathway for K+ acquisition, the effect exerted by the ionic environment on their contribution to K+ capture remains essentially unknown. Here, the influence of the ionic environment on the accumulation of transcripts coding for the barley (Hordeum vulgare) HvHAK1 transporter as well as on HvHAK1-mediated K+ capture has been examined. In situ mRNA hybridization studies show that HvHAK1 expression occurs in most root cells, being augmented at the outermost cell layers. Accumulation of HvHAK1 transcripts is enhanced by K+ deprivation and transiently by exposure to high salt concentrations. In addition, studies on the accumulation of transcripts coding for HvHAK1 and its close homolog HvHAK1b revealed the presence of two K+-responsive pathways, one repressed and the other insensitive to ammonium. Experiments with Arabidopsis (Arabidopsis thaliana) HvHAK1-expressing transgenic plants showed that K+ deprivation enhances the capture of K+ mediated by HvHAK1. A detailed study with HvHAK1-expressing Saccharomyces cerevisiae cells also revealed an increase of K+ uptake after K+ starvation. This increase did not occur in cells grown at high Na+ concentrations but took place for cells grown in the presence of NH4+. 3,3'-Dihexyloxacarbocyanine iodide accumulation measurements indicate that the increased capture of K+ in HvHAK1-expressing yeast cells cannot be explained only by changes in the membrane potential. It is shown that the yeast protein phosphatase PPZ1 as well as the halotolerance HAL4/HAL5 kinases negatively regulate the HvHAK1-mediated K+ transport.
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