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Statements

Subject Item
n2:RIV%2F00216224%3A14310%2F07%3A00022982%21RIV10-MSM-14310___
rdf:type
skos:Concept n17:Vysledek
dcterms:description
We explored in detail changes in root hydraulic resistance in response to alterations in nitrate supply as a potential mechanism that allows plants to respond rapidly to changes in their environment. Sunflower (Helianthus anuus cv. Holiday) plants grown in hydroponics with limited nitrate availability served as our model. The response was rapid, with a decrease of about 20% occurring within the first hour after addition of 5mM nitrate. We also showed that the magnitude of this effect was dependent on nitrate concentration. The change in root hydraulic resistance was largely reversible, although the temporal dynamics of the response to nitrate addition versus nitrate withdrawal differed, raising the possibility that the underlying mechanisms may also differ. We present evidence that the observed changes in root hydraulic properties, presumably due to changes in the activity of aquaporins, are linked with a reduction in nitrate concentration in root cells. We explored in detail changes in root hydraulic resistance in response to alterations in nitrate supply as a potential mechanism that allows plants to respond rapidly to changes in their environment. Sunflower (Helianthus anuus cv. Holiday) plants grown in hydroponics with limited nitrate availability served as our model. The response was rapid, with a decrease of about 20% occurring within the first hour after addition of 5mM nitrate. We also showed that the magnitude of this effect was dependent on nitrate concentration. The change in root hydraulic resistance was largely reversible, although the temporal dynamics of the response to nitrate addition versus nitrate withdrawal differed, raising the possibility that the underlying mechanisms may also differ. We present evidence that the observed changes in root hydraulic properties, presumably due to changes in the activity of aquaporins, are linked with a reduction in nitrate concentration in root cells.
dcterms:title
Dynamic changes in root hydraulic properties in response to nitrate availability Dynamic changes in root hydraulic properties in response to nitrate availability
skos:prefLabel
Dynamic changes in root hydraulic properties in response to nitrate availability Dynamic changes in root hydraulic properties in response to nitrate availability
skos:notation
RIV/00216224:14310/07:00022982!RIV10-MSM-14310___
n3:aktivita
n12:P
n3:aktivity
P(1P05ME793)
n3:cisloPeriodika
7
n3:dodaniDat
n9:2010
n3:domaciTvurceVysledku
n13:7650825
n3:druhVysledku
n10:J
n3:duvernostUdaju
n4:S
n3:entitaPredkladatele
n16:predkladatel
n3:idSjednocenehoVysledku
418376
n3:idVysledku
RIV/00216224:14310/07:00022982
n3:jazykVysledku
n14:eng
n3:klicovaSlova
hydraulic resistance; nitrate; Helianthus anuus
n3:klicoveSlovo
n7:hydraulic%20resistance n7:nitrate n7:Helianthus%20anuus
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[1D7B45DC0FAA]
n3:nazevZdroje
Journal of Experimental Botany
n3:obor
n5:EF
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
4
n3:projekt
n8:1P05ME793
n3:rokUplatneniVysledku
n9:2007
n3:svazekPeriodika
58
n3:tvurceVysledku
Zwieniecki, Maciej Gloser, Vít Holbrook, Michelle Orians, Colin
s:issn
0022-0957
s:numberOfPages
7
n18:organizacniJednotka
14310