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231223s2010 xx |||||o 00| ||eng c |
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|a 10.1016/j.jplph.2010.05.022
|2 doi
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|a pubmed24n0667.xml
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|a (DE-627)NLM200145312
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|a (NLM)20691498
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|a DE-627
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|c DE-627
|e rakwb
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|a eng
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| 100 |
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|a Rubio, Francisco
|e verfasserin
|4 aut
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|a Systems involved in K+ uptake from diluted solutions in pepper plants as revealed by the use of specific inhibitors
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|c 2010
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 15.02.2011
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|a Date Revised 30.09.2020
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Copyright © 2010 Elsevier GmbH. All rights reserved.
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|a Here, the contribution of the HAK1 transporter, the AKT1 channel and a putative AtCHX13 homolog to K(+) uptake in the high-affinity range of concentrations in pepper plants was examined. The limited development of molecular tools in pepper plants precluded a reverse genetics study in this species. By contrast, in the model plant Arabidopsis thaliana, these type of studies have shown that NH(4)(+) and Ba(2+) may be used as specific inhibitors of the two K(+) uptake systems to dissect their contribution in species in which, as in pepper, specific mutant lines are not available. By using these inhibitors together with Na(+) and Cs(+), the relative contributions of CaHAK1, CaAKT1 and a putative AtCHX13 homolog to K(+) acquisition from diluted solutions under different regimens of K(+) supply were studied. The results showed that, in plants completely starved of K(+), the gene encoding CaHAK1 was highly expressed and this system is a major contributor to K(+) uptake. However, K(+) concentrations as low as 50μM reduced CaHAK1 expression and the CaAKT1 channel came into play, participating together with CaHAK1 in K(+) absorption. The contribution of a putative AtCHX13 homolog seemed to be low under this low K(+) supply, but it cannot be ruled out that at higher K(+) concentrations this system participates in K(+) uptake. Studies of this type allow extension of the tools developed in model plants to understand nutrition in important crops
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Cation Transport Proteins
|2 NLM
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|a HAK1 protein, plant
|2 NLM
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|a Membrane Transport Modulators
|2 NLM
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|a Plant Proteins
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|a RNA, Messenger
|2 NLM
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|a Solutions
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|a Potassium
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|a RWP5GA015D
|2 NLM
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|a Arévalo, Laura
|e verfasserin
|4 aut
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|a Caballero, Fernando
|e verfasserin
|4 aut
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|a Botella, María Angeles
|e verfasserin
|4 aut
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|a Rubio, José Salvador
|e verfasserin
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|a García-Sánchez, Francisco
|e verfasserin
|4 aut
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|a Martínez, Vicente
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of plant physiology
|d 1979
|g 167(2010), 17 vom: 15. Nov., Seite 1494-9
|w (DE-627)NLM098174622
|x 1618-1328
|7 nnns
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| 773 |
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|g volume:167
|g year:2010
|g number:17
|g day:15
|g month:11
|g pages:1494-9
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|u http://dx.doi.org/10.1016/j.jplph.2010.05.022
|3 Volltext
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