ArticlePlant molecular biology2003
Regulated expression of Arabidopsis shaker K+ channel genes involved in K+ uptake and distribution in the plant.
Article in Plant molecular biology, 2003. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 73 papers.
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Who cites it
73 citing papers in PubMed, 258 citations in OpenAlex.
- A guard cell carbonic anhydrase binds and regulates SLAC1 separate from its catalytic activity.Nature communications · 2026Article
- Transcriptomic analysis reveals light quality response and systemic nutrient allocation under monochromatic light environments in Nicotiana tabacum.BMC plant biology · 2025Article
- Natural variation in potassium deficiency responses among Arabidopsis thaliana accessions.Plant & cell physiology · 2025Article
- A C4 plant K+ channel accelerates stomata to enhance C3 photosynthesis and water use efficiency.Plant physiology · 2025Article
- Genome-wide identification of kiwifruit KBMC plant biology · 2024Article
- Identification of Shaker Potassium Channel Family Members and Functional Characterization ofInternational journal of molecular sciences · 2024Article
- Research Progress on Plant Shaker KPlants (Basel, Switzerland) · 2024Review
- The Molecular Mechanism of Potassium Absorption, Transport, and Utilization in Rice.International journal of molecular sciences · 2023Review
- Roles of S-Adenosylmethionine and Its Derivatives in Salt Tolerance of Cotton.International journal of molecular sciences · 2023Review
- Article
- Engineering a KNature plants · 2022Article
- Mind the context: K+ channel subunit AtKC1 tunes local osmotic environment to adjust stomatal movement.The Plant cell · 2022Article
- Non-autonomous stomatal control by pavement cell turgor via the K+ channel subunit AtKC1.The Plant cell · 2022Article
- Identification and Characterization of Shaker KFrontiers in plant science · 2022Article
- Genome-Wide Identification and Characterization of the Shaker-Type KInternational journal of genomics · 2022Article
- Transcriptional and Metabolic Responses of Maize Shoots to Long-Term Potassium Deficiency.Frontiers in plant science · 2022Article
- Genome-Wide Identification, Genomic Organization, and Characterization of Potassium Transport-Related Genes inPlants (Basel, Switzerland) · 2021Article
- Adjustment of KInternational journal of molecular sciences · 2021Review
- Sucrose Utilization for Improved Crop Yields: A Review Article.International journal of molecular sciences · 2021Review
- SAUR proteins and PP2C.D phosphatases regulate H+-ATPases and K+ channels to control stomatal movements.Plant physiology · 2021Article
13 more citing papers are in PubMed but not listed here.
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Authors and funding
5 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Potassium is the most abundant cation in the cytosol, where it plays a role in basal functions. Rapid uptake and distribution of K+ is therefore required for plant growth. Three members of the so-called Shaker K+ channel gene family (nine genes identified in Arabidopsis) play a role in these transports: AKT1, SKOR and AKT2. The encoded proteins are involved in K+ uptake by the root, K+ secretion into the xylem sap and K+ transport in the phloem tissues, respectively. Using the GUS reporter strategy, we have found that another Shaker channel gene, AtKC1, is expressed in epidermal and cortical cells in roots (supporting the hypothesis of a role in K+ uptake from the soil, together with AKT1), and in trichomes and hydathodes in leaves. These four genes were selected for expression studies, and two-hybrid experiments were performed for channels displaying overlapping expression patterns. The data support the hypothesis that physical interactions could occur in planta between AtKC1 and AKT1, and between AKT1 and AKT2. Potassium deficiency, salt stress and hormonal treatments (ABA, BA, 2,4-D) were found to differentially affect channel mRNA levels, each channel displaying its own regulation pattern. The most prominent effects were (1) a strong induction of AtKC1 transcript accumulation in leaves (hydathodes, trichomes and leaf epidermis) in response to NaCl treatment, suggesting a key role of the protein in adaptation to saline conditions, and (2) a strong decrease in SKOR transcript levels by hormones, supporting the hypothesis that K+ secretion into the xylem sap is under tight hormonal control.
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