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231222s2001 xx ||||| 00| ||eng c |
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|a pubmed25n0378.xml
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|a (DE-627)NLM113171846
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|a (NLM)11413220
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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 Broadley, M R
|e verfasserin
|4 aut
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| 245 |
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|a Influx and accumulation of Cs(+) by the akt1 mutant of Arabidopsis thaliana (L.) Heynh. lacking a dominant K(+) transport system
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|c 2001
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| 336 |
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|a Text
|b txt
|2 rdacontent
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| 337 |
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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| 338 |
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|a Band
|b nc
|2 rdacarrier
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| 500 |
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|a Date Completed 23.08.2001
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|a Date Revised 13.05.2019
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|a published: Print
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|a Citation Status MEDLINE
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| 520 |
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|a An extensive literature reports that Cs(+), an environmental contaminant, enters plant cells through K(+) transport systems. Several recently identified plant K(+) transport systems are permeable to Cs(+). Permeation models indicate that most Cs(+) uptake into plant roots under typical soil ionic conditions will be mediated by voltage-insensitive cation (VIC) channels in the plasma membrane and not by the inward rectifying K(+) (KIR) channels implicated in plant K nutrition. Cation fluxes through KIR channels are blocked by Cs(+). This paper tests directly the hypothesis that the dominant KIR channel in plant roots (AKT1) does not contribute significantly to Cs(+) uptake by comparing Cs(+) uptake into wild-type and the akt1 knockout mutant of Arabidopsis thaliana (L.) Heynh. Wild-type and akt1 plants were grown to comparable size and K(+) content on agar containing 10 mM K(+). Both Cs(+) influx to roots of intact plants and Cs(+) accumulation in roots and shoots were identical in wild-type and akt1 plants. These data indicate that AKT1 is unlikely to contribute significantly to Cs(+) uptake by wild-type Arabidopsis from 'single-salt' solutions. The influx of Cs(+) to roots of intact wild-type and akt1 plants was inhibited by 1 mM Ba(2+), Ca(2+) and La(3+), but not by 10 microM Br-cAMP. This pharmacology resembles that of VIC channels and is consistent with the hypothesis that VIC channels mediate most Cs(+) influx under 'single-salt' conditions
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| 650 |
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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| 650 |
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|a Arabidopsis Proteins
|2 NLM
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| 650 |
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|a Plant Proteins
|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 AKT1 protein, Arabidopsis
|2 NLM
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| 650 |
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7 |
|a 147205-48-9
|2 NLM
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| 650 |
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|a Cesium
|2 NLM
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| 650 |
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|a 1KSV9V4Y4I
|2 NLM
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| 650 |
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|a Potassium
|2 NLM
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| 650 |
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7 |
|a RWP5GA015D
|2 NLM
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| 700 |
1 |
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|a Escobar-Gutiérrez, A J
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Bowen, H C
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Willey, N J
|e verfasserin
|4 aut
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| 700 |
1 |
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|a White, P J
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 52(2001), 357 vom: 18. Apr., Seite 839-44
|w (DE-627)NLM098182706
|x 0022-0957
|7 nnns
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| 773 |
1 |
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|g volume:52
|g year:2001
|g number:357
|g day:18
|g month:04
|g pages:839-44
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|a GBV_USEFLAG_A
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|a SYSFLAG_A
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|a GBV_NLM
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|a GBV_ILN_350
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| 951 |
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|a AR
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| 952 |
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|d 52
|j 2001
|e 357
|b 18
|c 04
|h 839-44
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