ArticlePlant physiology2005
The potassium transporter AtHAK5 functions in K(+) deprivation-induced high-affinity K(+) uptake and AKT1 K(+) channel contribution to K(+) uptake kinetics in Arabidopsis roots.
Article in Plant physiology, 2005. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 187 papers.
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Who cites it
187 citing papers in PubMed, 509 citations in OpenAlex.
- lncRNA62732 acts as an eTM of miR9778 to regulate TaHAK18-5B and mediate the potassium deficiency response in wheat.The New phytologist · 2026Article
- Potassium Deficiency and Hormone Signalling in Plants.Plant, cell & environment · 2026Review
- The Small Auxin Upregulated RNAPlants (Basel, Switzerland) · 2026Article
- The VvSAP8-VvHAK5 module from grape confers dual tolerance to potassium deficiency and salt stress by regulating potassium transport.Plant cell reports · 2026Article
- Vacuolar K⁺ efflux transporter TaTPK1-5D confers low-K⁺ tolerance of 'Zhengmai 136' through interaction with TaCIPK23-4D in bread wheat.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2025Article
- Advances in deciphering the mechanisms of salt tolerance in Maize.Plant signaling & behavior · 2025Review
- Recent Insights into the Molecular Mechanisms of Salt Tolerance in Melon (Plants (Basel, Switzerland) · 2025Review
- Optimizing Nutrient Dynamics for Crop Resilience to Abiotic Stress: An Endogenous Phytohormone Perspective.Plants (Basel, Switzerland) · 2025Review
- A comparative transcriptomic analysis provides insights into molecular mechanisms driving salt tolerance in soybean.Scientific reports · 2025Article
- Natural variation in potassium deficiency responses among Arabidopsis thaliana accessions.Plant & cell physiology · 2025Article
- The high-affinity KTransgenic research · 2025Article
- Article
- Identification, classification, and stress-responsive regulation ofFrontiers in plant science · 2025Article
- Salinity survival: molecular mechanisms and adaptive strategies in plants.Frontiers in plant science · 2025Review
- SlSTOP1-regulatedHorticulture research · 2024Article
- Arabidopsis HAK5 under low KNature communications · 2024Article
- Deciphering the genetic basis of salinity tolerance in a diverse panel of cultivated and wild soybean accessions by genome-wide association mapping.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2024Article
- Identification and Characterization ofInternational journal of molecular sciences · 2024Article
- Genome-wide transcriptome and gene family analysis reveal candidate genes associated with potassium uptake of maize colonized by arbuscular mycorrhizal fungi.BMC plant biology · 2024Article
- Genome-wide survey of KT/HAK/KUP genes in the genus Citrullus and analysis of their involvement in KBMC genomics · 2024Article
127 more citing papers are in PubMed but not listed here.
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3 authors at 1 institution in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
Potassium is an important macronutrient and the most abundant cation in plants. Because soil mineral conditions can vary, plants must be able to adjust to different nutrient availabilities. Here, we used Affymetrix Genechip microarrays to identify genes responsive to potassium (K(+)) deprivation in roots of mature Arabidopsis (Arabidopsis thaliana) plants. Unexpectedly, only a few genes were changed in their expression level after 6, 48, and 96 h of K(+) starvation even though root K(+) content was reduced by approximately 60%. AtHAK5, a potassium transporter gene from the KUP/HAK/KT family, was most consistently and strongly up-regulated in its expression level across 48-h, 96-h, and 7-d K(+) deprivation experiments. AtHAK5 promoter-beta-glucuronidase and -green fluorescent protein fusions showed AtHAK5 promoter activity in the epidermis and vasculature of K(+) deprived roots. Rb(+) uptake kinetics in roots of athak5 T-DNA insertion mutants and wild-type plants demonstrated the absence of a major part of an inducible high-affinity Rb(+)/K(+) (K(m) approximately 15-24 microm) transport system in athak5 plants. In comparative analyses, uptake kinetics of the K(+) channel mutant akt1-1 showed that akt1-1 roots are mainly impaired in a major transport mechanism, with an apparent affinity of approximately 0.9 mm K(+)(Rb(+)). Data show adaptation of apparent K(+) affinities of Arabidopsis roots when individual K(+) transporter genes are disrupted. In addition, the limited transcriptome-wide response to K(+) starvation indicates that posttranscriptional mechanisms may play important roles in root adaptation to K(+) availability in Arabidopsis. The results demonstrate an in vivo function for AtHAK5 in the inducible high-affinity K(+) uptake system in Arabidopsis roots.
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