Proteomics

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Mitochondrial alternative NADH dehydrogenases limit ROS, protect chloroplasts and promote survival of reoxygenation in Arabidopsis


ABSTRACT: Weather extremes are increasing worldwide frequently exposing plants to transient flooding. When floodwaters recede, plants have to cope with increased light intensity and elevated oxygen that favor excessive formation of reactive oxygen species (ROS). We report a novel molecular mechanism that helps Arabidopsis leaves cope with reoxygenation in the light that reveals a central role of the alternative electron tranport in mitochodria in cellular ROS management that is beneficial for photosynthetic recovery and provides tolerance to reoxygenation stress.

ORGANISM(S): Arabidopsis Thaliana (mouse-ear Cress)

SUBMITTER: MARGRET SAUTER 

PROVIDER: PXD032119 | JPOST Repository | Fri Dec 02 00:00:00 GMT 2022

REPOSITORIES: jPOST

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Publications

Mitochondrial alternative NADH dehydrogenases NDA1 and NDA2 promote survival of reoxygenation stress in Arabidopsis by safeguarding photosynthesis and limiting ROS generation.

Jethva Jay J   Lichtenauer Sophie S   Schmidt-Schippers Romy R   Steffen-Heins Anja A   Poschet Gernot G   Wirtz Markus M   van Dongen Joost T JT   Eirich Jürgen J   Finkemeier Iris I   Bilger Wolfgang W   Schwarzländer Markus M   Sauter Margret M  

The New phytologist 20230204 1


Plant submergence stress is a growing problem for global agriculture. During desubmergence, rising O<sub>2</sub> concentrations meet a highly reduced mitochondrial electron transport chain (mETC) in the cells. This combination favors the generation of reactive oxygen species (ROS) by the mitochondria, which at excess can cause damage. The cellular mechanisms underpinning the management of reoxygenation stress are not fully understood. We investigated the role of alternative NADH dehydrogenases (  ...[more]

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