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231223s2007 xx ||||| 00| ||eng c |
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|a pubmed24n0583.xml
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|a (DE-627)NLM174779259
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|a (NLM)17977848
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Pang, Xuequn
|e verfasserin
|4 aut
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|a Involvement of calcium signalling in dormancy release of grape buds
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|c 2007
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|a Text
|b txt
|2 rdacontent
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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|a Band
|b nc
|2 rdacarrier
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|a Date Completed 05.02.2008
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|a Date Revised 21.11.2013
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|a published: Print
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|a Citation Status MEDLINE
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|a Artificial induction of grape bud dormancy release by hydrogen cyanamide (HC) serves as a reliable model system to explore the events occurring shortly after the induction of dormancy release. Recently, a group of genes with remarkable differences in expression level between HC-treated and control buds was identified. The identification of several calcium signalling-related genes within that group raised the hypothesis of the involvement of Ca(2+) signalling in grape bud dormancy release. Therefore, the effects of HC treatment on the expression profiles of several calcium sensors, the effect of the plasma membrane calcium channel blocker LaCl(3) and the calcium chelator EGTA on HC-induced and chilling-induced bud-break, and the effect of HC application on calcium-dependent protein phosphorylation activities in the bud tissue were studied. Here the HC-induced expression of Ca(2+)-ATPase is described, indicating that this treatment might evoke an increase in [Ca(2+)]cyt. Similar induction was confirmed for calmodulin, calmodulin-binding protein, and calcium-dependent protein kinase (CDPK). Both LaCl(3) and EGTA blocked the inducing effect of HC on bud-break, and their inhibitory effects were removed by supplying exogenous Ca(2+). Calcium-dependent histone phosphorylation was up to 70% higher in HC-treated buds. Endogenous protein phosphorylation assays detected four proteins exhibiting increased phosphorylation following HC treatment, of which two were phosphorylated in a calcium-dependent manner. One of these, a 47 kDa protein, presented strong and Ca(2+)-dependent phosphorylation only in HC-treated buds. The potential role of CDPK in the phosphorylation of this protein was supported by an immunoprecipitation assay. The data suggest, for the first time, that calcium signalling is involved in the mechanism of bud dormancy release
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Histones
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|a lanthanum chloride
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|a Lanthanum
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|a Protein Kinases
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|a EC 2.7.-
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|a calcium-dependent protein kinase
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|a EC 2.7.1.-
|2 NLM
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|a Halaly, Tamar
|e verfasserin
|4 aut
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|a Crane, Omer
|e verfasserin
|4 aut
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|a Keilin, Tsvicka
|e verfasserin
|4 aut
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|a Keren-Keiserman, Alexandra
|e verfasserin
|4 aut
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|a Ogrodovitch, Aliza
|e verfasserin
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|a Galbraith, David
|e verfasserin
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|a Or, Etti
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 58(2007), 12 vom: 04., Seite 3249-62
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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| 773 |
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|g volume:58
|g year:2007
|g number:12
|g day:04
|g pages:3249-62
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|a GBV_USEFLAG_A
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|d 58
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|h 3249-62
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