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Molecular control of activity - dormancy transitions in Populus

Englund, Madeleine (2010). Molecular control of activity - dormancy transitions in Populus. Diss. (sammanfattning/summary) Umeå : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae, 1652-6880 ; 2010:18
ISBN 978-91-576-7495-1
[Doctoral thesis]

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Abstract

Perennials such as woody plants, growing in the high northern part of the earth have to cope with seasonal changes alternating between mild summer and the harsh winter periods. To survive and adapt their reproductive phase to the most favorable environmental conditions trees cycle between periods of active growth during summer and a state of growth arrest during winter, referred to as the activity- dormancy cycle. Studies underlying this thesis are aimed to increase our understanding of how plants growing in the high northern latitudes cope with the seasonal changes at a molecular level. Analysis of the global transcription in poplar showed that progression through the different stages of the annual activity- dormancy cycle is accompanied by massive transcriptional changes. Our data shows that genes involved in cell cycle regulation, chromatin remodeling and plant hormone signaling and biosynthesis are regulated during short day induced dormancy, suggesting key roles for these genes in the regulation of dormancy. Furthermore, we show that PttFIE, a plant homolog of the ESC component of the chromatin remodeling polycomb repression complex in Drosophila melanogaster, is a key regulator of dormancy. We also show that variation of timing of growth cessation and other physiological processes between ecotypes during dormancy induction could results from genetic variation in components downstream of the short day signal perception rather than in the perception of the short day signal.

Authors/Creators:Englund, Madeleine
Title:Molecular control of activity - dormancy transitions in Populus
Year of publishing :2010
Volume:2010:18
Number of Pages:56
Papers/manuscripts:
NumberReferences
ALL1 Resman L, Howe G, Jonsen D, Enlund M, Druart N, Schrader J, Antii H, Skinner J, Moritz T, Chen T, and Bhalerao RP. Molecular analysis reveals a role for components acting downstream of the day length perception machinery in regulating differential response to short day signal in regulating growth cessation and related processes in poplar. Submitted 2 Karlberg A, Englund M, Petterle A, Molnar G, Sjodin A, Bako L, and Bhalerao RP. Analysis of global changes in gene expression during activity-dormancy cycle in hybrid aspen apex. Plant Biotechnology 27(1); 1-16 3 Englund M, Karlberg A, Petterle A, Bako L, and Bhalerao RP. Polycomb repression complex component regulates dormancy in perennial plants. Manuscript
Place of Publication:Umeå
ISBN for printed version:978-91-576-7495-1
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agrovoc terms:populus, dormancy, meristems, seasonal variation, plant growth substances
Keywords:Populus, meristem, dormancy, bud, hormones, chromatin remodeling, Polycomb repression complex
URN:NBN:urn:nbn:se:slu:epsilon-3049
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-3049
ID Code:2238
Department:(S) > Dept. of Forest Genetics and Plant Physiology
Deposited By: Madeleine Englund
Deposited On:02 Mar 2011 00:00
Metadata Last Modified:02 Dec 2014 10:17

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