ArticleThe Plant cell2007
The organization of high-affinity ammonium uptake in Arabidopsis roots depends on the spatial arrangement and biochemical properties of AMT1-type transporters.
Article in The Plant cell, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 173 papers.
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Who cites it
173 citing papers in PubMed.
- Stress-Induced Metabolic Reprogramming in the Green MicroalgaMicroorganisms · 2026Article
- Origin and Evolution of Ammonium Transporters (AMTs) in Plants and Systematic Expression Studies inPlants (Basel, Switzerland) · 2026Article
- Root Transporters Shape Rhizosphere Microbiomes to Enhance Nitrogen Acquisition Efficiency in Plants.Microorganisms · 2026Review
- HHO5 orchestrates dose-dependent feedback regulation of organic versus inorganic nitrogen signaling in Arabidopsis.The Plant cell · 2026Article
- Comprehensive analysis of cotton AMT genes and functional analysis of the GhAMT1.4a in nitrogen metabolism.Functional & integrative genomics · 2026Article
- The Genome-Wide Identification and Expression Analysis of the AMT Gene Family in Foxtail Millet.Biology · 2026Article
- Reciprocal co-regulation of nitrate and ammonium transporters is modulated by external pH in Arabidopsis.Journal of experimental botany · 2026Article
- VviAMT4;1 Is a High-Affinity Ammonium Transporter in Table Grape.Plants (Basel, Switzerland) · 2026Article
- Review
- Replanting alters nitrogen uptake and the expression level of ammonium transporter genes in grapevine.BMC plant biology · 2025Article
- Transcriptomic analysis reveals light quality response and systemic nutrient allocation under monochromatic light environments in Nicotiana tabacum.BMC plant biology · 2025Article
- Genome-Wide Analysis of Ammonium Transporter Genes in Flowering Chinese Cabbage and Functional Insights into BcAMT1.1 Under Low-Nitrogen Conditions.Plants (Basel, Switzerland) · 2025Article
- Genome-Wide Identification of theGenes · 2025Article
- Plants have two minds as we do.Plant signaling & behavior · 2025Review
- Effects of AM fungal inoculation on the growth, nitrogen uptake and metabolism of Camellia Oleifera under different nitrogen levels.BMC plant biology · 2025Article
- Unraveling nitrogen uptake and metabolism: gene families, expression dynamics and functional insights in aspen (Populus tremula).Tree physiology · 2025Article
- Nitrogen Management of Variety Screening of Winter Wheat Cultivated on Chernozem Soil for Yield Optimization.Plants (Basel, Switzerland) · 2025Article
- Optimizing Nutrient Dynamics for Crop Resilience to Abiotic Stress: An Endogenous Phytohormone Perspective.Plants (Basel, Switzerland) · 2025Review
- Influence of Cushion PlantPlants (Basel, Switzerland) · 2025Article
- Nitrogen Use Efficiency in Agriculture: Integrating Biotechnology, Microbiology, and Novel Delivery Systems for Sustainable Agriculture.Plants (Basel, Switzerland) · 2025Review
113 more citing papers are in PubMed but not listed here.
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8 authors.
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Abstract
The AMMONIUM TRANSPORTER (AMT) family comprises six isoforms in Arabidopsis thaliana. Here, we describe the complete functional organization of root-expressed AMTs for high-affinity ammonium uptake. High-affinity influx of (15)N-labeled ammonium in two transposon-tagged amt1;2 lines was reduced by 18 to 26% compared with wild-type plants. Enrichment of the AMT1;2 protein in the plasma membrane and localization of AMT1;2 promoter activity in the endodermis and root cortex indicated that AMT1;2 mediates the uptake of ammonium entering the root via the apoplasmic transport route. An amt1;1 amt1;2 amt1;3 amt2;1 quadruple mutant (qko) showed severe growth depression under ammonium supply and maintained only 5 to 10% of wild-type high-affinity ammonium uptake capacity. Transcriptional upregulation of AMT1;5 in nitrogen-deficient rhizodermal and root hair cells and the ability of AMT1;5 to transport ammonium in yeast suggested that AMT1;5 accounts for the remaining uptake capacity in qko. Triple and quadruple amt insertion lines revealed in vivo ammonium substrate affinities of 50, 234, 61, and 4.5 muM for AMT1;1, AMT1;2, AMT1;3, and AMT1;5, respectively, but no ammonium influx activity for AMT2;1. These data suggest that two principle means of achieving effective ammonium uptake in Arabidopsis roots are the spatial arrangement of AMT1-type ammonium transporters and the distribution of their transport capacities at different substrate affinities.
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