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Symbiotic Interactions Between Indigenous Pacific Northwest Fungi and Wheat

Citation

Faulkner, Shawna Lee. (2017). Symbiotic Interactions Between Indigenous Pacific Northwest Fungi and Wheat. Theses and Dissertations Collection, University of Idaho Library Digital Collections. https://www.lib.uidaho.edu/digital/etd/items/faulkner_idaho_0089n_11192.html

Title:
Symbiotic Interactions Between Indigenous Pacific Northwest Fungi and Wheat
Author:
Faulkner, Shawna Lee
Date:
2017
Keywords:
disease modification endophytes functional roles plant symbioses
Program:
Natural Resources
Subject Category:
Plant pathology
Abstract:

Microbes that asymptomatically colonize the internal tissues and organs of plants are endophytes. Endophytes sometimes benefit their hosts by mediating responses to stress. Variation in endophyte interactions with hosts is observed depending on environmental factors. Here, variation in endophyte interactions is examined in wheat. First, functional roles of four Penicillium isolates were explored in wheat, cheatgrass, and cottonwood hosts. Next, demonstrated antagonists of Fusarium crown rot in wheat were taken to a field location to replicate antagonism; however, conditions were not conductive to disease development. Finally, Fusarium crown rot antagonists were applied to Fusarium head blight. Some inoculants were facilitators and antagonists of disease severity. Tolerance was observed in previously classified susceptible and moderately resistant. The disease facilitator and antagonists also contributed to tolerance as significant differences in disease levels were observed in inoculant treatments, but fecundity was not impacted. This may be the first report of endophytes as contributors to tolerance.

Description:
masters, M.S., Natural Resources -- University of Idaho - College of Graduate Studies, 2017
Major Professor:
Newcombe, George
Committee:
Ridout, Mary; Schroeder, Kurtis
Defense Date:
2017
Identifier:
Faulkner_idaho_0089N_11192
Type:
Text
Format Original:
PDF
Format:
application/pdf

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