FIG 3.

AgNO₃ exposure impact on photosystem in vivo. (A) Spectral analyses of wild type (WT) cells grown overnight by photosynthesis and exposed or not to 1 mM AgNO₃ after they reach an OD₆₈₀ of 2. Spectra (350 to 1,000 nm) were recorded after 2- (light red line), 10- (purple line), or 20-h (blue line) exposure on a double-beam Cary 500 spectrophotometer. (B) Spectral analyses of the WT cells exposed or not to 1 mM CdCl₂ (gray line), NiSO₄ (purple line), CuSO₄ (blue line), or AgNO₃ (black line) after they reached an OD₆₈₀ of 2. Spectra were recorded after 20 h of exposure. Mal (dark red line), untreated cells grown in malate medium.