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ABA and chromatin remodelling regulate the activity-dormancy cycle in hybrid aspen

Petterle, Anna (2011). ABA and chromatin remodelling regulate the activity-dormancy cycle in hybrid aspen. Diss. (sammanfattning/summary) Umea : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 ; 2011:17
ISBN 978-91-576-7552-1
[Doctoral thesis]

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One of the most important survival strategies plants have evolved is the cessation of growth and development of dormancy in response to the seasonal changes. Apical meristems of deciduous woody plants living in temperate and boreal zones undergo a yearly cycle between an active and a dormant state, which allows them to protect the meristem and avoid damage provoked by extremes of low temperatures during the winter. The transition between an active and a dormant state includes a complex network of physiological and developmental processes such as acquisition of cold hardiness, bud formation and maturation and metabolic changes, which are underlined by a global change in gene expression. The studies described in my thesis provide an overview of the transcriptional control underlying the activity-dormancy cycle and are aimed to dissect the regulation of overlapping short days (SD)-induced processes. We investigated the control of SD-induced bud formation and maturation, acquisition of adaptive responses and of endodormancy and identified novel key molecular players regulating these processes. Our results provide evidence for a composite control of the activity-dormancy cycle by the SD signal that involves plant hormone abscisic acid (ABA) and a component of a chromatin remodelling complex, FERTILISATION INDEPEDENDENT ENDOSPERM (FIE), as key players. Importantly, our work reveals a degree of conservation in the regulatory framework for the control of dormancy in seeds and apical buds.

Authors/Creators:Petterle, Anna
Title:ABA and chromatin remodelling regulate the activity-dormancy cycle in hybrid aspen
Series Name/Journal:Acta Universitatis Agriculturae Sueciae
Year of publishing :2011
Number of Pages:108
ALLI Karlberg A., Englund M., Petterle A., Molnar G., Sjodin A., Bako L., Bhalerao R.P. (2010). Analysis of global changes in gene expression during activity-dormancy cycle in hybrid aspen apex. Plant Biotechnology 27(1), 1-16. II Petterle A., Resman L. and Bhalerao R.P. (2011). ABA acts at multiple stages to control SD-mediated activity-dormancy transition. Manuscript. III Englund M., Molnar G., Petterle A., Gaboreanu I., Bereczky Z., Karlberg A. and Bhalerao R.P. (2011). Polycomb repression complex component FIE regulates dormancy related processes in perennial plants and Arabidopsis. Manuscript.
Place of Publication:Umea
ISBN for printed version:978-91-576-7552-1
Publication Type:Doctoral thesis
Full Text Status:Public
Agrovoc terms:populus, seed dormancy, aba, buds, photoperiodicity, gene expression, cold tolerance
Keywords:Populus, activity-dormancy cycle, ABA, chromatin remodelling, FIE, cold acclimation, apical bud, seed dormancy
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ID Code:2458
Department:(S) > Dept. of Forest Genetics and Plant Physiology
Deposited By: anna petterle
Deposited On:17 Mar 2011 00:00
Metadata Last Modified:02 Dec 2014 10:18

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