ArticleJournal of experimental botany2010
Competition between uptake of ammonium and potassium in barley and Arabidopsis roots: molecular mechanisms and physiological consequences.
Article in Journal of experimental botany, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 63 papers.
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Who cites it
63 citing papers in PubMed, 206 citations in OpenAlex.
- Long-Distance Trafficking of Mineral Elements From Soil-to-Seed Under Climate Change Impacts Crop Nutritional Quality.Plant, cell & environment · 2026Review
- Reciprocal co-regulation of nitrate and ammonium transporters is modulated by external pH in Arabidopsis.Journal of experimental botany · 2026Article
- Potassium nutrition regulates growth, nutrient-carbon interactions and lignification during autumn in Tsoongiodendron odorum seedlings.BMC plant biology · 2026Article
- Cesium accumulation in nodules is involved in mitigating cesium transfer to shoot.Scientific reports · 2025Article
- Transcriptomic analysis reveals light quality response and systemic nutrient allocation under monochromatic light environments in Nicotiana tabacum.BMC plant biology · 2025Article
- Effects of Simulated Nitrogen Deposition on the Physiological and Growth Characteristics of Seedlings of Two Typical Subtropical Tree Species.Plants (Basel, Switzerland) · 2025Article
- Phytochemical and morpho-physiological response of Melissa officinalis L. to different NHBMC plant biology · 2024Article
- Potassium adsorption capacity and desorption kinetics in soils of Qenberenaweti sub-watershed, central highlands of Ethiopia.Heliyon · 2024Article
- Regulating Effect of Exogenous α-Ketoglutarate on Ammonium Assimilation in Poplar.Molecules (Basel, Switzerland) · 2024Article
- Molecular Insights into the Synergistic Effects of Putrescine and Ammonium on Dinoflagellates.International journal of molecular sciences · 2024Article
- Mineral nutrients in plants under changing environments: A road to future food and nutrition security.The plant genome · 2023Review
- Sage leaf rock rose water extract: a bio-solution for enhancing the growth and salt stress resistance of sorghum plants.Physiology and molecular biology of plants : an international journal of functional plant biology · 2023Article
- CIPK15-mediated inhibition of NHHeliyon · 2023Article
- The anion channel SLAH3 interacts with potassium channels to regulate nitrogen-potassium homeostasis and the membrane potential in Arabidopsis.The Plant cell · 2023Article
- Integrated comparative transcriptome and physiological analysis reveals the metabolic responses underlying genotype variations in NHFrontiers in plant science · 2023Article
- The KFrontiers in plant science · 2023Article
- Differential Effects of Ammonium (NHPlants (Basel, Switzerland) · 2022Article
- A Model Nutrition Control System in Potato Tissue Culture and Its Influence on Plant Elemental Composition.Plants (Basel, Switzerland) · 2022Article
- Review
- Effects of Nitrogen Forms on the Growth and Nitrogen Accumulation inPlants (Basel, Switzerland) · 2022Article
3 more citing papers are in PubMed but not listed here.
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Authors and funding
7 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Plants can use ammonium (NH4+) as the sole nitrogen source, but at high NH4+ concentrations in the root medium, particularly in combination with a low availability of K+, plants suffer from NH4+ toxicity. To understand the role of K+ transporters and non-selective cation channels in K+/NH4+ interactions better, growth, NH4+ and K+ accumulation and the specific fluxes of NH4+, K+, and H+ were examined in roots of barley (Hordeum vulgare L.) and Arabidopsis seedlings. Net fluxes of K+ and NH4+ were negatively correlated, as were their tissue concentrations, suggesting that there is direct competition during uptake. Pharmacological treatments with the K+ transport inhibitors tetraethyl ammonium (TEA+) and gadolinium (Gd3+) reduced NH4+ influx, and the addition of TEA+ alleviated the NH4+-induced depression of root growth in germinating Arabidopsis plants. Screening of a barley root cDNA library in a yeast mutant lacking all NH4+ and K+ uptake proteins through the deletion of MEP1-3 and TRK1 and TRK2 resulted in the cloning of the barley K+ transporter HvHKT2;1. Further analysis in yeast suggested that HvHKT2;1, AtAKT1, and AtHAK5 transported NH4+, and that K+ supplied at increasing concentrations competed with this NH4+ transport. On the other hand, uptake of K+ by AtHAK5, and to a lesser extent via HvHKT2;1 and AtAKT1, was inhibited by increasing concentrations of NH4+. Together, the results of this study show that plant K+ transporters and channels are able to transport NH4+. Unregulated NH4+ uptake via these transporters may contribute to NH4+ toxicity at low K+ levels, and may explain the alleviation of NH4+ toxicity by K+.
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