ArticlePlant physiology2000
Sodium-dependent nitrate transport at the plasma membrane of leaf cells of the marine higher plant Zostera marina L.
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 12 papers.
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Who cites it
12 citing papers in PubMed, 57 citations in OpenAlex.
- Combined Phosphorus and Potassium Starvation Upregulates Sodium Accumulation by HKT1;1 in Tomato Plants.Plant, cell & environment · 2026Article
- Optimizing the Soil Calcium:Magnesium Ratio Improves the Mitragynine Yield and Seedling Growth in Kratom (Plants (Basel, Switzerland) · 2026Article
- Nitrogen in plants: from nutrition to the modulation of abiotic stress adaptation.Stress biology · 2022Review
- Alkalinity cycling and carbonate chemistry decoupling in seagrass mystify processes of acidification mitigation.Scientific reports · 2021Article
- Coordinated Transport of Nitrate, Potassium, and Sodium.Frontiers in plant science · 2020Review
- Short-Term Response of CytosolicFrontiers in plant science · 2020Article
- Molecular Characterization ofInternational journal of molecular sciences · 2019Article
- The effect of encapsulated nitrate and monensin on ruminal fermentation using a semi-continuous culture system.Journal of animal science · 2018Article
- Na⁺-Dependent High-Affinity Nitrate, Phosphate and Amino Acids Transport in Leaf Cells of the SeagrassInternational journal of molecular sciences · 2018Article
- High-throughput deep sequencing reveals that microRNAs play important roles in salt tolerance of euhalophyte Salicornia europaea.BMC plant biology · 2015Article
- Effects of CO(2) enrichment on photosynthesis, growth, and nitrogen metabolism of the seagrass Zostera noltii.Ecology and evolution · 2012Article
- Ecophysiology of photosynthesis in macroalgae.Photosynthesis research · 2012Review
Corrections and comments
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Authors and funding
5 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
NO(3)(-) is present at micromolar concentrations in seawater and must be absorbed by marine plants against a steep electrochemical potential difference across the plasma membrane. We studied NO(3)(-) transport in the marine angiosperm Zostera marina L. to address the question of how NO(3)(-) uptake is energized. Electrophysiological studies demonstrated that micromolar concentrations of NO(3)(-) induced depolarizations of the plasma membrane of leaf cells. Depolarizations showed saturation kinetics (K(m) = 2.31 +/- 0.78 microM NO(3)(-)) and were enhanced in alkaline conditions. The addition of NO(3)(-) did not affect the membrane potential in the absence of Na(+), but depolarizations were restored when Na(+) was resupplied. NO(3)(-)-induced depolarizations at increasing Na(+) concentrations showed saturation kinetics (K(m) = 0.72 +/- 0.18 mM Na(+)). Monensin, an ionophore that dissipates the Na(+) electrochemical potential, inhibited NO(3)(-)-evoked depolarizations by 85%, and NO(3)(-) uptake (measured by depletion from the external medium) was stimulated by Na(+) ions and by light. Our results strongly suggest that NO(3)(-) uptake in Z. marina is mediated by a high-affinity Na(+)-symport system, which is described here (for the first time to our knowledge) in an angiosperm. Coupling the uptake of NO(3)(-) to that of Na(+) enables the steep inwardly-directed electrochemical potential for Na(+) to drive net accumulation of NO(3)(-) within leaf cells.
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