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Permanent link (DOI): https://doi.org/10.7939/R31T1T

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Hormone metabolism and action in developing pea fruit Open Access

Descriptions

Other title
Subject/Keyword
Development
Pisum sativum
Pericarp
Seed
Abscisic acid
Auxin receptors
Gibberellins
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Nadeau, Courtney
Supervisor and department
Ozga, Jocelyn (Agricultural, Food, and Nutritional Sciences)
Examining committee member and department
Scarpella, Enrico (Biological Sciences)
Good, Allen (Biological Sciences)
Department
Department of Agricultural, Food, and Nutritional Science
Specialization

Date accepted
2009-09-03T17:07:23Z
Graduation date
2009-11
Degree
Master of Science
Degree level
Master's
Abstract
The developmental programs of maturing seed and fruit in pea (Pisum sativum L.) are tightly controlled by the interactions of several phytohormones, including gibberellins (GAs), auxins, and abscisic acid (ABA). To more fully understand these hormone networks and their roles in controlling development, transcription profiles of GA metabolism genes and metabolite profiles of key GAs, auxins, and ABA were determined in developing seeds, and histological studies were employed to correlate physiology and hormone metabolism. Data suggest that bioactive GA stimulates several aspects of seed growth, and ABA appears to promote bioactive GA1 synthesis in rapidly growing seed coats, and inhibit GA biosynthesis in the embryo axes of maturing embryos. Two putative auxin receptor genes were cloned, and their transcription profiles examined in developing seed and pericarp tissues. Pericarp PsAFB6A transcription was responsive to auxin and seed signals, indicating a potential role for the modulation of auxin sensitivity in fruit development.
Language
English
DOI
doi:10.7939/R31T1T
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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File title: Nadeau M.Sc. Thesis
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File author: Courtney
Page count: 176
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