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Transcriptomic responses governing heartwood formation and osmotic stress responses in western redcedar (Thuja plicata)

Resource type
Thesis type
(Thesis) M.Sc.
Date created
2022-04-22
Authors/Contributors
Abstract
Thuja plicata trees produce a heartwood that is well known for its durability; nevertheless, logged trees are frequently afflicted by heartwood rot. In addition, increasingly severe summer droughts are resulting in T. plicata die-off in coastal British Columbia. The genetic bases of heartwood formation and drought resistance in T. plicata are unknown. To generate a comprehensive overview of the activities during heartwood formation and exposure to drought, transcriptome profiling was done. Heartwood formation indicated expected processes such as terpene and lignan biosynthesis, but also unexpected activities, most notably flavonoid and wax biosynthesis, hormone signaling and transcription regulators, providing new targets for rot resistance selection. Similar comparisons of the effect of drought stress on roots and stems identified hundreds of genes, many of which mapped to known functions in drought resistance and allowed, for the first time, the formulation of a framework for how T. plicata responds to drought stress.
Document
Extent
228 pages.
Identifier
etd21931
Copyright statement
Copyright is held by the author(s).
Permissions
This thesis may be printed or downloaded for non-commercial research and scholarly purposes.
Supervisor or Senior Supervisor
Thesis advisor: Mattsson, Jim
Language
English
Member of collection
Download file Size
etd21931.pdf 11.27 MB

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