The abstract is read at the publisher; the summary is JClub's.
Combined loss of mitochondrial MDH1 and NAD-malic enzyme (ME1/ME2) in Arabidopsis thaliana causes reversible, short-day/low-light–dependent impairment of growth and photosynthesis.
- Why it matters: Plants must balance carbon and redox between chloroplasts, cytosol, and mitochondria, but how disrupting mitochondrial malate conversion affects performance under energy-limited light regimes is unclear.
- What they did: Using reverse genetics, the mdh1 me1 me2 double mutant was compared with growth under contrasting photoperiods and irradiances, followed by transfer experiments plus transcriptomic and proteomic profiling.
- The result: Under short-day/low-light, mutants showed impaired growth and photosynthetic performance with cytosolic redox imbalance and altered chloroplast ultrastructure, and transfer experiments showed reversibility determined by the prevailing growth conditions.
The findingWhy it mattersWhat they didThe result
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