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231224s2012 xx |||||o 00| ||eng c |
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|a 10.1093/jxb/ers144
|2 doi
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|e rakwb
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|a eng
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| 100 |
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|a Barros, Pedro M
|e verfasserin
|4 aut
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| 245 |
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|a Cold acclimation and floral development in almond bud break
|b insights into the regulatory pathways
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|c 2012
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 17.04.2013
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|a Date Revised 20.08.2012
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a In temperate fruit trees, seasonal dormancy and cold acclimation have a major impact on blooming time and, consequently, fruit production. To gain insight into the still unclear molecular processes underlying blooming, expression of genes putatively involved in the cold response was studied in almond (Prunus dulcis Mill.), which is the earliest fruit tree in the family Rosaceae to bloom. The transcript levels of two C-repeat binding factor (PdCBF) genes and one of their putative targets, PdDehydrin1 (PdDHN1), were analysed in flower buds and shoot internodes during seasonal dormancy up to bud break. In parallel, expression of candidate genes related to flower development was also followed. In a 2-year study, PdCBF2 showed a progressive increase in transcript abundance during the autumn in close correlation with cold acclimation, while high transcript levels of PdCBF1 and PdDHN1 were already found by summer. After bud break, with temperatures still within the chilling range, both PdCBF genes and PdDHN1 were found to sharply reduce transcription in flower buds and internodes, suggesting damping of CBF-mediated cold signalling during growth resumption, in correlation with cold hardiness decline. Flower bud break was also followed by a decrease in the expression of PdGA20OX, a candidate gene involved in gibberellin biosynthesis, and an increase in the expression of two homeotic genes related to floral organ development, PdMADS1 and -3. These genes may also be relevant players in the regulation of anthesis in this model Rosaceae species
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Plant Proteins
|2 NLM
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| 650 |
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|a RNA, Plant
|2 NLM
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|a RNA
|2 NLM
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|a 63231-63-0
|2 NLM
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| 700 |
1 |
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|a Gonçalves, Nuno
|e verfasserin
|4 aut
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|a Saibo, Nelson J M
|e verfasserin
|4 aut
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| 700 |
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|a Oliveira, M Margarida
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 63(2012), 12 vom: 03. Juli, Seite 4585-96
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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| 773 |
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|g volume:63
|g year:2012
|g number:12
|g day:03
|g month:07
|g pages:4585-96
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|u http://dx.doi.org/10.1093/jxb/ers144
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