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Statements

Subject Item
n2:RIV%2F61389030%3A_____%2F12%3A00382527%21RIV13-AV0-61389030
rdf:type
n5:Vysledek skos:Concept
dcterms:description
We reported earlier that boron stimulates hypocotyl growth in several Arabidopsis ecotypes but not in the boron-deficient mutant bor1-1. Others have shown that boron influences the metabolism and transport of the plant hormone auxin. We investigated how boron, in interaction with light, influences Arabidopsis hypocotyl growth responses to the exogenous auxins 1-NAA, 2,4-D and IAA. In either light condition, 1-NAA similarly inhibited hypocotyl growth in bor1-1 and the corresponding WT (Col-0), while in both genotypes, boron did not essentially affect the extent of the inhibition. Whatever the light conditions and in the absence of boron, 2,4-D inhibited hypocotyl elongation in WT, while in BL seedlings, high responsiveness to 2,4-D vanished when boron was added to the culture medium. Hypocotyl of bor1-1 seedlings in all boron concentrations tested and grown in the dark or RL responded to the auxin similar to WT plants. In BL, the mutant hypocotyls retained full sensitivity to 2,4-D at 0.1 mM H3BO3 but lost that sensitivity by 2 mM. In both genotypes tested, in the dark or RL, IAA inhibited hypocotyl growth. Conversely, IAA stimulated hypocotyl elongation in both genotypes developed in BL at 0.1 mM H3BO3. That stimulation disappeared when the boron supply increased to 2 mM. Our results suggest that specifically in BL, boron reduces hypocotyl responsiveness to auxins 2,4-D or IAA via the functional transporter BOR1. Our results lead to a discussion of how BL and BOR1 influence the mechanisms of auxin transport into and out of the cell. We reported earlier that boron stimulates hypocotyl growth in several Arabidopsis ecotypes but not in the boron-deficient mutant bor1-1. Others have shown that boron influences the metabolism and transport of the plant hormone auxin. We investigated how boron, in interaction with light, influences Arabidopsis hypocotyl growth responses to the exogenous auxins 1-NAA, 2,4-D and IAA. In either light condition, 1-NAA similarly inhibited hypocotyl growth in bor1-1 and the corresponding WT (Col-0), while in both genotypes, boron did not essentially affect the extent of the inhibition. Whatever the light conditions and in the absence of boron, 2,4-D inhibited hypocotyl elongation in WT, while in BL seedlings, high responsiveness to 2,4-D vanished when boron was added to the culture medium. Hypocotyl of bor1-1 seedlings in all boron concentrations tested and grown in the dark or RL responded to the auxin similar to WT plants. In BL, the mutant hypocotyls retained full sensitivity to 2,4-D at 0.1 mM H3BO3 but lost that sensitivity by 2 mM. In both genotypes tested, in the dark or RL, IAA inhibited hypocotyl growth. Conversely, IAA stimulated hypocotyl elongation in both genotypes developed in BL at 0.1 mM H3BO3. That stimulation disappeared when the boron supply increased to 2 mM. Our results suggest that specifically in BL, boron reduces hypocotyl responsiveness to auxins 2,4-D or IAA via the functional transporter BOR1. Our results lead to a discussion of how BL and BOR1 influence the mechanisms of auxin transport into and out of the cell.
dcterms:title
Boron and blue light reduce responsiveness of Arabidopsis hypocotyls to exogenous auxins Boron and blue light reduce responsiveness of Arabidopsis hypocotyls to exogenous auxins
skos:prefLabel
Boron and blue light reduce responsiveness of Arabidopsis hypocotyls to exogenous auxins Boron and blue light reduce responsiveness of Arabidopsis hypocotyls to exogenous auxins
skos:notation
RIV/61389030:_____/12:00382527!RIV13-AV0-61389030
n5:predkladatel
n6:ico%3A61389030
n3:aktivita
n8:P n8:Z
n3:aktivity
P(GA521/09/0445), Z(AV0Z50380511)
n3:cisloPeriodika
3
n3:dodaniDat
n4:2013
n3:domaciTvurceVysledku
n7:5998557 n7:4073371 n7:1152661
n3:druhVysledku
n19:J
n3:duvernostUdaju
n12:S
n3:entitaPredkladatele
n18:predkladatel
n3:idSjednocenehoVysledku
125398
n3:idVysledku
RIV/61389030:_____/12:00382527
n3:jazykVysledku
n16:eng
n3:klicovaSlova
Arabidopsis thaliana; Auxin; Boron
n3:klicoveSlovo
n14:Boron n14:Auxin n14:Arabidopsis%20thaliana
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[CF45AA0FE4D3]
n3:nazevZdroje
Plant Growth Regulation
n3:obor
n20:EF
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
3
n3:projekt
n15:GA521%2F09%2F0445
n3:rokUplatneniVysledku
n4:2012
n3:svazekPeriodika
66
n3:tvurceVysledku
Stočes, Štěpán Fellner, Martin Karlická, Marie
n3:wos
000302573400008
n3:zamer
n13:AV0Z50380511
s:issn
0167-6903
s:numberOfPages
9
n17:doi
10.1007/s10725-011-9646-2