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Permanent link (DOI): https://doi.org/10.7939/R3ZK55V50

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Evaluating trembling aspen (Populus tremuloides Michx.) seedling stock characteristics in response to drought and out-planting on a reclamation site Open Access

Descriptions

Other title
Subject/Keyword
reclamation
drought
mine reclamation
drought stress
trembling aspen
aspen
hydrogel
seedling quality
out-planting
aspect
boreal
root to shoot ratio
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Kulbaba, Shaun P
Supervisor and department
Landhausser, Simon M (Renewable Resources)
Examining committee member and department
Comeau, Philip G (Renewable Resources)
Dyck, Miles F (Renewable Resources)
Department
Department of Renewable Resources
Specialization
Land Reclamation and Remediation
Date accepted
2014-08-14T09:51:04Z
Graduation date
2014-11
Degree
Master of Science
Degree level
Master's
Abstract
Trembling aspen (Populus tremuloides Michx.) seedlings often display reduced growth, or transplant shock, following out-planting largely due to moisture constraints. This thesis explores the influence of seedling size (root volume), root to stem ratio (RSR) and non-structural carbohydrate (NSC) reserves on the growth performance and physiological status of aspen seedlings under varying levels of drought stress in a controlled growth chamber and following out-planting on a reclamation site. These characteristics have been found to improve out-planting success in aspen and may also increase drought tolerance. In the growth chamber study, stem growth and foliar development was reduced under drought, but the degree growth decreased was greatly influenced by initial seedling characteristics. Small seedlings with high RSR displayed the greatest stem growth and leaf area under drought stress, while large seedlings with low RSR had the poorest shoot growth. Similarly, high initial RSR resulted in the greatest above-ground growth performance in seedlings after out-planting. Root growth was sensitive to environmental factors in the growth chamber and on the reclamation site, but was not influenced by initial characteristics.
Language
English
DOI
doi:10.7939/R3ZK55V50
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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