ArticlePlant physiology2004
Protection of plasma membrane K+ transport by the salt overly sensitive1 Na+-H+ antiporter during salinity stress.
Article in Plant physiology, 2004. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 54 papers, 1 of them a synthesis that pooled it.
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Who cites it
54 citing papers in PubMed, 1 synthesis or guideline pooled it, 210 citations in OpenAlex.
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- Unfolding molecular switches for salt stress resilience in soybean: recent advances and prospects for salt-tolerant smart plant production.Frontiers in plant science · 2023Review
- Structural basis for the activity regulation of a potassium channel AKT1 from Arabidopsis.Nature communications · 2022Article
- Sex-specific photosynthetic capacity and NaFrontiers in plant science · 2022Article
- HKT sodium and potassium transporters in Arabidopsis thaliana and related halophyte species.Physiologia plantarum · 2021Review
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- OsJAZ9 overexpression modulates jasmonic acid biosynthesis and potassium deficiency responses in rice.Plant molecular biology · 2020Article
- Ectopic overexpression of a cotton plastidial NaPlanta · 2020Article
- Diverse Physiological Functions of Cation Proton Antiporters across Bacteria and Plant Cells.International journal of molecular sciences · 2020Review
- Identification of Shaker KPlanta · 2019Article
- A Critical Role of Sodium Flux via the Plasma Membrane NaPlant physiology · 2019Article
- The Effect of AtHKT1;1 or AtSOS1 Mutation on the Expressions of Na⁺ or K⁺ Transporter Genes and Ion Homeostasis inInternational journal of molecular sciences · 2019Article
- Role and Functional Differences of HKT1-Type Transporters in Plants under Salt Stress.International journal of molecular sciences · 2019Review
- Co-expression of SpSOS1 and SpAHA1 in transgenic Arabidopsis plants improves salinity tolerance.BMC plant biology · 2019Article
- Transcriptome and metabolome analyses of two contrasting sesame genotypes reveal the crucial biological pathways involved in rapid adaptive response to salt stress.BMC plant biology · 2019Article
- The High-Affinity Potassium Transporter EpHKT1;2 From the ExtremophileFrontiers in plant science · 2018Article
- Two NHX-type transporters from Helianthus tuberosus improve the tolerance of rice to salinity and nutrient deficiency stress.Plant biotechnology journal · 2018Article
Corrections and comments
- Erratum issued
Authors and funding
2 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Physicochemical similarities between K(+) and Na(+) result in interactions between their homeostatic mechanisms. The physiological interactions between these two ions was investigated by examining aspects of K(+) nutrition in the Arabidopsis salt overly sensitive (sos) mutants, and salt sensitivity in the K(+) transport mutants akt1 (Arabidopsis K(+) transporter) and skor (shaker-like K(+) outward-rectifying channel). The K(+)-uptake ability (membrane permeability) of the sos mutant root cells measured electrophysiologically was normal in control conditions. Also, growth rates of these mutants in Na(+)-free media displayed wild-type K(+) dependence. However, mild salt stress (50 mm NaCl) strongly inhibited root-cell K(+) permeability and growth rate in K(+)-limiting conditions of sos1 but not wild-type plants. Increasing K(+) availability partially rescued the sos1 growth phenotype. Therefore, it appears that in the presence of Na(+), the SOS1 Na(+)-H(+) antiporter is necessary for protecting the K(+) permeability on which growth depends. The hypothesis that the elevated cytoplasmic Na(+) levels predicted to result from loss of SOS1 function impaired the K(+) permeability was tested by introducing 10 mm NaCl into the cytoplasm of a patch-clamped wild-type root cell. Complete loss of AKT1 K(+) channel activity ensued. AKT1 is apparently a target of salt stress in sos1 plants, resulting in poor growth due to impaired K(+) uptake. Complementary studies showed that akt1 seedlings were salt sensitive during early seedling development, but skor seedlings were normal. Thus, the effect of Na(+) on K(+) transport is probably more important at the uptake stage than at the xylem loading stage.
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