Fig.1.

The rates of respiratory O₂ uptake (A) and photosynthetic O₂ evolution (B) in leaf discs of WT and aox1a mutants after pre-illumination (6 h) at a PPFD of 50 µmol m⁻² s⁻¹ at 25 °C in the absence and presence of AA. After pre-illumination, leaf discs were incubated in the dark for 10–15 min during electrode calibration. Subsequently, respiration was measured in the dark for 5 min followed by photosynthesis measured in the light for 10 min at 250 µmol m⁻² s⁻¹ as NaHCO₃-dependent (approx. 5 %, v/v) O₂ evolution.