Foliar fungal diversity related to Myrtle rust (Austropuccinia psidii) antagonism and its implications for pathogen resistance in the endangered Hawaiian Nioi (Eugenia koolauensis)
Foliar fungal diversity related to Myrtle rust (Austropuccinia psidii) antagonism and its implications for pathogen resistance in the endangered Hawaiian Nioi (Eugenia koolauensis)
Date
2019
Authors
Chock, Mason Kamalani
Contributor
Advisor
Amend, Anthony S.
Department
Botany
Instructor
Depositor
Speaker
Researcher
Consultant
Interviewer
Annotator
Journal Title
Journal ISSN
Volume Title
Publisher
Volume
Number/Issue
Starting Page
Ending Page
Alternative Title
Abstract
An introduced fungal rust pathogen, Austropuccinia psidii, is a primary component contributing to the decline of the critically endangered Hawaiian Eugenia tree (Eugenia koolauensis). Once common on the islands of Oʻahu and Molokaʻi, E. koolauensis is now limited to 11 populations with a total of ~99 mature individuals on the island of Oʻahu. Hundreds of asymptomatic fungal species live within the E. koolauensis leaf tissue, and recent studies imply the composition of these foliar fungal communities can affect the severity of pathogens such as A. psidii. Using molecular and culture-based methods, I characterized the foliar fungal community and introduced these diverse fungi in to microbiome of E. koolauensis leaves infected by A. psidii. By manipulating the composition of the leaf microbiome, via application of a leaf slurry and single isolate spore-slurries, I demonstrated how increased fungal diversity promotes resistance to A. psidii in E. koolauensis. These results highlight the potential of harnessing native microbes to induce disease resistance within a conservation context.
Description
Keywords
Microbiology,
Ecology,
Plant pathology,
Biocontrol,
Conservation,
Culture-based,
Diversity,
Forestry,
Hyperparasitism
Citation
Extent
58 pages
Format
Geographic Location
Time Period
Related To
Table of Contents
Rights
All UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner.
Rights Holder
Local Contexts
Collections
Email libraryada-l@lists.hawaii.edu if you need this content in ADA-compliant format.