Elucidating the contribution of Alternative Oxidase 1a and 1d to respiration rates in Arabidopsis thaliana

Glenda Oh

Research output: ThesisDoctoral Thesis

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Abstract

Alternative oxidase (AOX) provides plants with metabolic flexibility by uncoupling respiration from ATP production. Exogenous supply of proline (Pro) and alanine (Ala) double night-time respiration rates and significantly induce AOX1a and AOX1d abundance. Enhanced AOX1a and AOX1d capacities allowed for Pro and Ala catabolism to be performed in a safe manner, limiting oxidative stress and allowing continuous functioning of other metabolic pathways, such as the TCA cycle and photosynthesis. Lack of AOX limited the ability of plants to recover from salinity stress through proline catabolism. These results show specific benefits of AOX during changes in metabolism from an energetic standpoint.
Original languageEnglish
QualificationDoctor of Philosophy
Awarding Institution
  • The University of Western Australia
Supervisors/Advisors
  • Millar, Harvey, Supervisor
  • O'Leary, Brendan, Supervisor
  • Lee, Alex, Supervisor
Thesis sponsors
Award date17 May 2022
DOIs
Publication statusUnpublished - 2021

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