FIGURE 7.

Weaker antenna-reaction center association in copper-deficient cells. 77 K fluorescence emission spectra of samples prepared from CGL78 in black, cgl78-ami11 in bright blue, and cgl78-ami13 in dark blue. Cells are grown in TAP medium with copper (+Cu) (A) or without copper (−Cu) supplementation (B) at a PFD of 100 μmol m⁻² s⁻¹. Cells grown in TAP medium with copper were exposed for 24 h to high light (600 μmol m⁻² s⁻¹) (C). D, CGL78 lines were grown in TAP medium containing 20 (black) or 0.25 μm (orange) iron. The excitation wavelength was 435 nm. Fluorescence emission was normalized to the value at 685 nm. The peaks are labeled with the wavelength of the maximum if applicable.