ArticleThe Plant cell1998
AtKuP1: a dual-affinity K+ transporter from Arabidopsis.
Article in The Plant cell, 1998. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 100 papers.
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100 citing papers in PubMed, 290 citations in OpenAlex.
- Identification of the HAK/KUP/KT Potassium Transporter Gene Family in Sweet Potato and Functional Characterization of IbHAK5A.Plants (Basel, Switzerland) · 2026Article
- Advances in deciphering the mechanisms of salt tolerance in Maize.Plant signaling & behavior · 2025Review
- Integrated transcriptomic and metabolomic analyses elucidate the mechanism by which grafting impacts potassium utilization efficiency in tobacco.BMC plant biology · 2025Article
- The Class I HD-ZIP transcription factor PagHB7a functions as a positive regulator of salt tolerance inForestry research · 2025Article
- Comparative Transcriptome Analysis Revealed Candidate Gene Modules Involved in Salt Stress Response in Sweet Basil and Overexpression ofPlants (Basel, Switzerland) · 2024Article
- How Plants Tolerate Salt Stress.Current issues in molecular biology · 2023Review
- The Sweet Potato KPlants (Basel, Switzerland) · 2023Article
- Dimerisation of the Yeast KInternational journal of molecular sciences · 2022Article
- Potassium transporter KUP9 participates in KStress biology · 2022Article
- Genome-wide characterization and expression analysis of the HAK gene family in response to abiotic stresses in Medicago.BMC genomics · 2022Article
- Transcriptome analysis of sweet potato responses to potassium deficiency.BMC genomics · 2022Article
- Yeast Trk1 Potassium Transporter Gradually Changes Its Affinity in Response to Both External and Internal Signals.Journal of fungi (Basel, Switzerland) · 2022Article
- Ethylene-induced potassium transporter AcKUP2 gene is involved in kiwifruit postharvest ripening.BMC plant biology · 2022Article
- Alleviation of Oxidative Damage Induced by CaClFrontiers in plant science · 2022Article
- Recent Advances in Genome-wide Analyses of Plant Potassium Transporter Families.Current genomics · 2021Review
- The TCP transcription factor PeTCP10 modulates salt tolerance in transgenic Arabidopsis.Plant cell reports · 2021Article
- Identification and characterization of HAK/KUP/KT potassium transporter gene family in barley and their expression under abiotic stress.BMC genomics · 2021Article
- Potential Networks of Nitrogen-Phosphorus-Potassium Channels and Transporters in Arabidopsis Roots at a Single Cell Resolution.Frontiers in plant science · 2021Article
- Genome-wide characterization and expression analysis of HAK K3 Biotech · 2021Article
- Article
40 more citing papers are in PubMed but not listed here.
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Plant roots contain both high- and low-affinity transport systems for uptake of K+ from the soil. In this study, we characterize a K+ transporter that functions in both high- and low-affinity uptake. Using yeast complementation analysis, we isolated a cDNA for a functional K+ transporter from Arabidopsis (referred to as AtKUP1 for Arabidopsis thaliana K+ uptake). When expressed in a yeast mutant, AtKUP1 dramatically increased K+ uptake capacity at both a low and high [K+] range. Kinetic analyses showed that AtKUP1-mediated K+ uptake displays a "biphasic" pattern similar to that observed in plant roots. The transition from the high-affinity phase (K(m) of 44 microM) to the low-affinity phase (K(m) of 11 mM) occurred at 100 to 200 microM external K+. Both low- and high-affinity K+ uptake via AtKUP1 were inhibited by 5 mM or higher concentrations of NaCl. In addition, AtKUP1-mediated K+ uptake was inhibited by K+ channel blockers, including tetraethylammonium, Cs+, and Ba2+. Consistent with a possible function in K+ uptake from the soil, the AtKUP1 gene is primarily expressed in roots. We conclude that the AtKUP1 gene product may function as a K+ transporter in Arabidopsis roots over a broad range of [K+] in the soil.
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