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CC BY-NC V4.0, Open Access
Dissertation
AN INVESTIGATION OF LIGNIN SYNTHESIS, DEPOSITION, AND COMPOSITION IN GRASS BIOTIC STRESS RESISTANCE AND ABIOTIC STRESS TOLERANCE
Washington State University
Doctor of Philosophy (PhD), Washington State University
05/2024
DOI:
https://doi.org/10.7273/000006553
Abstract
Lignin is an essential phenolic polymer found in the secondary cell walls of most terrestrial plants. The subunits of lignin are synthesized in the phenylpropanoid pathway in the cytosol, and exported into the apoplast during secondary cell wall synthesis. These lignin monomers are then polymerized via oxidative radical coupling, imbuing the plant cell with the properties of hydrophobicity and rigidity. Emerging evidence suggests the compositions and magnitudes of lignification of these tissues contribute to a multitude of stress resistances, including drought, heavy metals toxicity, microbial pathogens, and herbivory. This project sought to investigate how, when, and where lignin contributes to stress resistance in bread wheat, and how these potentially beneficial phenotypes can be translated into elite wheat lines to be cultivated in the Pacific Northwest. In particular, we found that lignin-related stress resistances are species specific, and that improved constitutive lignification can potentially improve water use efficiency. This project supports that lignin may be a novel focus trait to be bred for in future elite cereal lines.
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Details
- Title
- AN INVESTIGATION OF LIGNIN SYNTHESIS, DEPOSITION, AND COMPOSITION IN GRASS BIOTIC STRESS RESISTANCE AND ABIOTIC STRESS TOLERANCE
- Creators
- Luigi Michal Peracchi
- Contributors
- Karen A Sanguinet (Chair)Kimberly Garland-Campbell (Committee Member)Andrei Smertenko (Committee Member)Bernd M Lange (Committee Member)
- Awarding Institution
- Washington State University
- Academic Unit
- Crop and Soil Sciences, Department of
- Theses and Dissertations
- Doctor of Philosophy (PhD), Washington State University
- Publisher
- Washington State University
- Number of pages
- 253
- Identifiers
- 99901121439101842
- Language
- English
- Resource Type
- Dissertation