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231224s2013 xx |||||o 00| ||eng c |
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|a 10.1093/jxb/ert085
|2 doi
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|a pubmed24n1340.xml
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|a (NLM)23580750
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|a DE-627
|b ger
|c DE-627
|e rakwb
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| 041 |
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|a eng
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| 100 |
1 |
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|a Jayakannan, Maheswari
|e verfasserin
|4 aut
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| 245 |
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|a Salicylic acid improves salinity tolerance in Arabidopsis by restoring membrane potential and preventing salt-induced K+ loss via a GORK channel
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|c 2013
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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| 500 |
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|a Date Completed 13.12.2013
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|a Date Revised 22.03.2024
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Despite numerous reports implicating salicylic acid (SA) in plant salinity responses, the specific ionic mechanisms of SA-mediated adaptation to salt stress remain elusive. To address this issue, a non-invasive microelectrode ion flux estimation technique was used to study kinetics of NaCl-induced net ion fluxes in Arabidopsis thaliana in response to various SA concentrations and incubation times. NaCl-induced K(+) efflux and H(+) influx from the mature root zone were both significantly decreased in roots pretreated with 10-500 μM SA, with strongest effect being observed in the 10-50 μM SA range. Considering temporal dynamics (0-8-h SA pretreatment), the 1-h pretreatment was most effective in enhancing K(+) retention in the cytosol. The pharmacological, membrane potential, and shoot K(+) and Na(+) accumulation data were all consistent with the model in which the SA pretreatment enhanced activity of H(+)-ATPase, decreased NaCl-induced membrane depolarization, and minimized NaCl-induced K(+) leakage from the cell within the first hour of salt stress. In long-term treatments, SA increased shoot K(+) and decreased shoot Na(+) accumulation. The short-term NaCl-induced K(+) efflux was smallest in the gork1-1 mutant, followed by the rbohD mutant, and was highest in the wild type. Most significantly, the SA pretreatment decreased the NaCl-induced K(+) efflux from rbohD and the wild type to the level of gork1-1, whereas no effect was observed in gork1-1. These data provide the first direct evidence that the SA pretreatment ameliorates salinity stress by counteracting NaCl-induced membrane depolarization and by decreasing K(+) efflux via GORK channels
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a H+ flux
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|a H+-ATPase
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|a K+ flux
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|a depolarization
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|a membrane potential
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|a outward-rectifying K+ channel
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|a potassium homeostasis.
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|a Plant Growth Regulators
|2 NLM
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| 650 |
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|a Potassium Channels
|2 NLM
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| 650 |
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|a Sodium Chloride
|2 NLM
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| 650 |
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|a 451W47IQ8X
|2 NLM
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| 650 |
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|a Salicylic Acid
|2 NLM
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| 650 |
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|a O414PZ4LPZ
|2 NLM
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| 650 |
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|a Potassium
|2 NLM
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| 650 |
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|a RWP5GA015D
|2 NLM
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| 700 |
1 |
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|a Bose, Jayakumar
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Babourina, Olga
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Rengel, Zed
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Shabala, Sergey
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 64(2013), 8 vom: 10. Mai, Seite 2255-68
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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| 773 |
1 |
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|g volume:64
|g year:2013
|g number:8
|g day:10
|g month:05
|g pages:2255-68
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| 856 |
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|u http://dx.doi.org/10.1093/jxb/ert085
|3 Volltext
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