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Academic theses · English

Timing is everything : exploring the role of the circadian clock in plant growth and adaptation

Johan Sjölander, 1988- (Author)
ISBN 9789180704212 · print
Umeå universitet. Institutionen för fysiologisk botanik (Publisher)
publication
Umeå : Department of Plant Physiology, Umeå University, 2024
100 sidor
Johan Sjölander
Book

Availability by type

Subject
circadian clock, growth, trees, hybrid aspen, populus tremula x tremuloides, gibberellin, ABA, Biologisk rytm, Asp (träd)
Has other physical format
Timing is everything: exploring the role of the circadian clock in plant growth and adaptation · ISBN 9789180704229 (Även utgiven elektroniskt)
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Summary

Due to their sessile nature, plants must precisely time and coordinate their physiological processes with daily and seasonal changes in the environment. In this PhD thesis, I explored the interaction between an internal timekeeper, or circadian clock, and hormonal regulation, and how it may control plant growth and adaptation in the model species Arabidopsis thaliana (Arabidopsis) and hybrid aspen (Populus tremula x P. tremuloides). Our research showed how the circadian clock component ZEITLUPE (ZTL) regulates abscisic acid (ABA)-mediated stomatal closure, indicating its central role in environmental adaptation. We investigated the effects of manipulating gibberellin (GA) metabolism in hybrid aspen by the strategic expression of the Arabidopsis GIBBERELLIN20-OXIDASE1 gene, using a clock-controlled promoter. This approach struck a delicate balance between enhanced growth and seasonal adaptation and showed potential for increased tree performance through biotechnological means. Our studies on the circadian clock components LATE ELONGATED HYPOCOTYL (LHY) and EARLY BIRD (EBI) in hybrid aspen suggested their involvement in regulating GA metabolism and overall plant growth. Taken together, these findings improve our understanding of how plants regulate growth and respond to environmental stresses and help to provide solutions for enhancing plant resilience and productivity.

Details

Contributor and role
Johan Sjölander, 1988- (Author)
Classification
571.77 (DDC Classification)
Dissertation Information
Diss. (sammanfattning) Umeå : Umeå universitet, 2024
Note
  • With a summary in Swedish
Contributor and role
Umeå universitet. Institutionen för fysiologisk botanik (Publisher)
Identifier
ISBN 9789180704212 · print
Indirectly identified by
ISBN 9789180704229 · pdf
Title resource
Timing is everything : exploring the role of the circadian clock in plant growth and adaptation
Creative responsibility statement
Johan Sjölander
publication
Umeå : Department of Plant Physiology, Umeå University, 2024
Extent
100 sidor
Relaterad beskrivning eller innehåll
Fritt tillgänglig via Umeå universitet
Note
  • Härtill 3 uppsatser
Physical details note
illustrationer
Has other physical format
Timing is everything: exploring the role of the circadian clock in plant growth and adaptation · ISBN 9789180704229 (Även utgiven elektroniskt)
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