Dissertation
Cellular Protection and Tolerance Mechanisms to Heat and Drought Stress in Triticum Aestivum
Washington State University
Doctor of Philosophy (PhD), Washington State University
2023
DOI:
https://doi.org/10.7273/000006373
Abstract
This dissertation is dedicated to understanding cellular protection mechanism of heat and drought stress resiliency in Triticum aestivum. Cellular protection mechanisms include maintaining ROS homeostasis through scavenging ROS and using autophagy to degrade damaged cellular components, were investigated as an adaptive drought and heat tolerance strategy in wheat. Cellular protection mechanisms are underutilized traits in breeding programs due to complexity of cellular dynamics. Therefore, the development of techniques to phenotype different aspects of cellular protection would impact breeding for heat and drought resiliency. In this dissertation: (1) the growth and development of genetically different wheat varieties through flowering time, root architecture, and yield under drought stress were compared; (2) photosynthetic parameters and ROS homeostasis activity under drought was examined; (3) molecular markers for ROS homeostasis and regulators of peroxisome proliferation were identified; and (4) molecular markers of autophagy were development and characterized, and autophagy under heat and drought was phenotyped in a wheat diversity population. PEX11C, CAT2, ATG8, ATG7, and NBR1 were identified as molecular markers for ROS homeostasis and autophagy in wheat. These markers can be used to facilitate breeding heat and drought resilient wheat varieties.
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Details
- Title
- Cellular Protection and Tolerance Mechanisms to Heat and Drought Stress in Triticum Aestivum
- Creators
- Kathleen Frances Hickey
- Contributors
- Andrei Smertenko (Advisor)Asaph Cousins (Committee Member)Helmut Kirchhoff (Committee Member)Karen Sanguinet (Committee Member)
- Awarding Institution
- Washington State University
- Academic Unit
- Program in Molecular Plant Sciences
- Theses and Dissertations
- Doctor of Philosophy (PhD), Washington State University
- Publisher
- Washington State University
- Number of pages
- 185
- Identifiers
- 99901087514801842
- Language
- English
- Resource Type
- Dissertation