. Bacterial photosynthesis. Bacteria -- Physiology; Photosynthesis. 354 PHOTOMECHANICAL CONSIDERATIONS. Fig. 2. Light-induced ESR signal in a sonic extract (cf. text) of Chloropseudomonas ethylicum for light of )^xaaiX. ^^^ "^^- '^^^ signal is obtained by numerical integration of the spectrometer recordings (averaged over 2 spectra). Material was extracted from a 6-day-old culture. DISCUSSION These preliminary results show that 825 m/i light absorbed exclu- sively by chlorophyll-770 in a green bacterium /;? vivo and in a sonic fraction is effective in generating a ;?,/ ESR signal with a g
. Bacterial photosynthesis. Bacteria -- Physiology; Photosynthesis. 354 PHOTOMECHANICAL CONSIDERATIONS. Fig. 2. Light-induced ESR signal in a sonic extract (cf. text) of Chloropseudomonas ethylicum for light of )^xaaiX. ^^^ "^^- '^^^ signal is obtained by numerical integration of the spectrometer recordings (averaged over 2 spectra). Material was extracted from a 6-day-old culture. DISCUSSION These preliminary results show that 825 m/i light absorbed exclu- sively by chlorophyll-770 in a green bacterium /;? vivo and in a sonic fraction is effective in generating a ;?,/ ESR signal with a g-value comparable to that of purple photosynthetic bacteria. This substantiates the hypothesis that in this organism chlorophyll-770 is directly active in photosynthesis. From Table 1 it might be concluded that light with Aj^^x. '^^^ ^^ and absorbed by chlorobium chlorophyll is less effective in producing unpaired electrons than is light with Xmax. 825 m/i. This conclusion, however, would be justified only if the sample were not totally absorb-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Symposium on Bacterial Photosynthesis (1963 : Yellow Springs, Ohio); Charles F. Kettering Research Laboratory (Yellow Springs, Ohio); Gest, Howard. Yellow Springs, Ohio, Antioch Press
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