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Statements

Subject Item
n2:RIV%2F61389030%3A_____%2F14%3A00432728%21RIV15-GA0-61389030
rdf:type
n16:Vysledek skos:Concept
dcterms:description
Seed germination is an important life-cycle transition because it determines subsequent plant survival and reproductive success. To detect optimal spatiotemporal conditions for germination, seeds act as sophisticated environmental sensors integrating information such as ambient temperature. Here we show that the DELAY OF GERMINATION 1 (DOG1) gene, known for providing dormancy adaptation to distinct environments, determines the optimal temperature for seed germination. By reciprocal gene-swapping experiments between Brassicaceae species we show that the DOG1-mediated dormancy mechanism is conserved. Biomechanical analyses show that this mechanism regulates the material properties of the endosperm, a seed tissue layer acting as germination barrier to control coat dormancy. We found that DOG1 inhibits the expression of gibberellin (GA)-regulated genes encoding cell-wall remodeling proteins in a temperature-dependent manner. Furthermore we demonstrate that DOG1 causes temperature-dependent alterations in the seed GA metabolism. These alterations in hormone metabolism are brought about by the temperature-dependent differential expression of genes encoding key enzymes of the GA biosynthetic pathway. These effects of DOG1 lead to a temperature-dependent control of endosperm weakening and determine the optimal temperature for germination. The conserved DOG1-mediated coat-dormancy mechanism provides a highly adaptable temperature-sensing mechanism to control the timing of germination. Seed germination is an important life-cycle transition because it determines subsequent plant survival and reproductive success. To detect optimal spatiotemporal conditions for germination, seeds act as sophisticated environmental sensors integrating information such as ambient temperature. Here we show that the DELAY OF GERMINATION 1 (DOG1) gene, known for providing dormancy adaptation to distinct environments, determines the optimal temperature for seed germination. By reciprocal gene-swapping experiments between Brassicaceae species we show that the DOG1-mediated dormancy mechanism is conserved. Biomechanical analyses show that this mechanism regulates the material properties of the endosperm, a seed tissue layer acting as germination barrier to control coat dormancy. We found that DOG1 inhibits the expression of gibberellin (GA)-regulated genes encoding cell-wall remodeling proteins in a temperature-dependent manner. Furthermore we demonstrate that DOG1 causes temperature-dependent alterations in the seed GA metabolism. These alterations in hormone metabolism are brought about by the temperature-dependent differential expression of genes encoding key enzymes of the GA biosynthetic pathway. These effects of DOG1 lead to a temperature-dependent control of endosperm weakening and determine the optimal temperature for germination. The conserved DOG1-mediated coat-dormancy mechanism provides a highly adaptable temperature-sensing mechanism to control the timing of germination.
dcterms:title
DELAY OF GERMINATION 1 mediates a conserved coat-dormancy mechanism for the temperature- and gibberellin-dependent control of seed germination DELAY OF GERMINATION 1 mediates a conserved coat-dormancy mechanism for the temperature- and gibberellin-dependent control of seed germination
skos:prefLabel
DELAY OF GERMINATION 1 mediates a conserved coat-dormancy mechanism for the temperature- and gibberellin-dependent control of seed germination DELAY OF GERMINATION 1 mediates a conserved coat-dormancy mechanism for the temperature- and gibberellin-dependent control of seed germination
skos:notation
RIV/61389030:_____/14:00432728!RIV15-GA0-61389030
n3:aktivita
n11:P n11:I
n3:aktivity
I, P(ED0007/01/01), P(GA14-34792S), P(GD522/08/H003), P(LK21306), P(LO1204)
n3:cisloPeriodika
34
n3:dodaniDat
n14:2015
n3:domaciTvurceVysledku
n12:3252434 n12:1609882 n12:8118086 n12:6117082 n12:4712048
n3:druhVysledku
n13:J
n3:duvernostUdaju
n15:S
n3:entitaPredkladatele
n18:predkladatel
n3:idSjednocenehoVysledku
10123
n3:idVysledku
RIV/61389030:_____/14:00432728
n3:jazykVysledku
n5:eng
n3:klicovaSlova
dormancy gene DOG1; gibberellin metabolism; germination temperature
n3:klicoveSlovo
n6:germination%20temperature n6:gibberellin%20metabolism n6:dormancy%20gene%20DOG1
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[D252A80622AA]
n3:nazevZdroje
Proceedings of the National Academy of Sciences of the United States of America
n3:obor
n17:EB
n3:pocetDomacichTvurcuVysledku
5
n3:pocetTvurcuVysledku
13
n3:projekt
n4:ED0007%2F01%2F01 n4:GD522%2F08%2FH003 n4:LK21306 n4:GA14-34792S n4:LO1204
n3:rokUplatneniVysledku
n14:2014
n3:svazekPeriodika
111
n3:tvurceVysledku
Strnad, Miroslav Voegele, A. Steinbrecher, T. Urbanová, Terezie Tarkowská, Danuše Ignatz, M. Graeber, K. Leubner-Metzger, Gerhard Linkies, A. Turečková, Veronika
n3:wos
000340780300012
s:issn
0027-8424
s:numberOfPages
10
n8:doi
10.1073/pnas.1403851111