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Molecular analysis of growth cessation and dormancy in hybrid aspen

Tylewicz, Szymon (2015). Molecular analysis of growth cessation and dormancy in hybrid aspen. Diss. (sammanfattning/summary) Umeå : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 ; 2015:14
ISBN 978-91-576-8226-0
eISBN 978-91-576-8227-7
[Doctoral thesis]

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Perennial plants such as trees living in temperate zones experience extreme changes in temperature during summers and winters. In order to survive, shoot apical and cambial meristem undergo a transition from active growth to dormant state, well in advance of winter onset. The transition between an active growth and dormancy involves physiological and developmental processes such as bud formation, acquisition of cold hardiness that are underpinned by massive changes transcriptional and metabolic programs.

The studies of this thesis provide an insight into the molecular regulation underlying the photoperiodic control of growth cessation, adaptive response and acquisition of dormancy in model tree hybrid aspen. Our data show that components of flowering pathway i.e. LAP1 and FDL1 have evolved new functions to mediate in SD-control of growth cessation and adaptive response. Furthermore, we found that FIE, a component of evolutionary conserved PRC2 complex, in concert with Abscisic Acid (ABA) are key regulators of dormancy in Populus. We demonstrate that an interplay between these two components and yet another chromatin remodelling factor PICKLE is necessary for the development of dormancy.

In summary, this thesis sheds new light on molecular regulation of activity-dormancy cycle in hybrid aspen. Our better understanding of how trees regulate growth cessation, adaptive response and dormancy may be useful to devise strategies to engineer trees with altered activity-dormancy traits in order to improve their productivity under the impending climate change.

Authors/Creators:Tylewicz, Szymon
Title:Molecular analysis of growth cessation and dormancy in hybrid aspen
Series Name/Journal:Acta Universitatis Agriculturae Sueciae
Year of publishing :27 January 2015
Depositing date:27 January 2015
Number of Pages:73
IAbdul Azeez; Pál Miskolczi; Szymon Tylewicz; Rishikesh P Bhalerao (2014). A tree ortholog of APETALA1 mediates photoperiodic control of seasonal growth. Current Biology 24(7), 717–724
IISzymon Tylewicz, Hiroyuki Tsuji, Pál Miskolczi , Anna Petterle, Abdul Azeez, Kristoffer Jonsson, Ko Shimamoto and Rishikesh P. Bhalerao. Dual role of tree florigen activation complex component FD in photoperiodic growth control and adaptive response pathways (Manuscript, in revision).
IIISzymon Tylewicz, Anna Petterle, Madeleine Englund, Lars Resman and Rishikesh P. Bhalerao. Polycomb and ABA mediate photoperiodic control of bud dormancy (Manuscript).
Place of Publication:Umeå
Publisher:Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences
ISBN for printed version:978-91-576-8226-0
ISBN for electronic version:978-91-576-8227-7
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:F Plant production > F60 Plant physiology and biochemistry
F Plant production > F62 Plant physiology - Growth and development
K Forestry > K01 Forestry - General aspects
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Biochemistry and Molecular Biology
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Botany
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
Agrovoc terms:populus, hybrids, buds, dormancy, plant developmental stages, growth, photoperiodicity, aba, gene expression
Keywords:bud dormancy, growth cessation, Populus
Permanent URL:
ID Code:11816
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Forest Genetics and Plant Physiology
Deposited By: Szymon Tylewicz
Deposited On:29 Jan 2015 10:04
Metadata Last Modified:10 Sep 2020 13:41

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