Alternative Oxidase to Optimise Plant Growth and Stress Tolerance

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Biomass accumulation in plants is the balance of CO2 fixed into carbohydrates through photosynthesis and carbohydrate burned (respired), ~ 50% of fixed CO2, to fuel growth. Plants possess energy conserving and non-conserving respiratory pathways. The alternative energy non-conserving pathway appears wasteful but is necessary for plant tolerance to adverse growth conditions. Our research has achieved modification of the alternative respiratory pathway that positively impacts plant growth. We will dissect the mechanism(s) of how the alternative respiratory pathway stimulates growth, from a molecular level to whole plant physiology, answering a long-standing question of the role of the alternative respiratory pathway in plant cell biology.