Fig. 2: Typical chlorophyll fluorescence traces of stt7-9 cells measured with Dual-PAM. | Nature Communications

Fig. 2: Typical chlorophyll fluorescence traces of stt7-9 cells measured with Dual-PAM.

From: Weak acids produced during anaerobic respiration suppress both photosynthesis and aerobic respiration

Fig. 2: Typical chlorophyll fluorescence traces of stt7-9 cells measured with Dual-PAM.

Cells were illuminated with a strong actinic light (AL, 1500 μmol photons m−2 s−1) for 150 s followed by a dark recovery (4 min). a The addition of 4.5 mM HAc (the pH of medium 5.5) caused fluorescence quenching and the addition of KOH (the pH of medium 7.5) abolished it. b The addition of 50 mM NaAc leads to fluorescence quenching (350 s–650 s) which was abolished upon addition of 100 μM nigericin (650 s–810 s). c Adding HCl (pH of medium 5.5), and KOH to titrate the pH back to 7.5 did not affect fluorescence. d The fluorescence did not change when the 50 mM NaCl was added.

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