. Bacterial photosynthesis. Bacteria -- Physiology; Photosynthesis. INHIBITORS AND PHOTO PIGMENT SYNTHESIS 57. 120 180 240 MINUTES 300 360 Fig. 3. Effect of amj^al on growth and bacteriochlorophyll synthesis. The ex- periment was conducted as described in the legend of Fig. 1, except that at zero time one culture (open points) receivedamytal ( x 10-3 jv/). Symbols as for Fig. 1. These results can be summarized by saying that amytal mimics the effect of a sudden ^gcrease in light intensity, while DNP and dicoumarol mimic the effect of a sudden increase in light intensity. Bacterio- chlorophy
. Bacterial photosynthesis. Bacteria -- Physiology; Photosynthesis. INHIBITORS AND PHOTO PIGMENT SYNTHESIS 57. 120 180 240 MINUTES 300 360 Fig. 3. Effect of amj^al on growth and bacteriochlorophyll synthesis. The ex- periment was conducted as described in the legend of Fig. 1, except that at zero time one culture (open points) receivedamytal ( x 10-3 jv/). Symbols as for Fig. 1. These results can be summarized by saying that amytal mimics the effect of a sudden ^gcrease in light intensity, while DNP and dicoumarol mimic the effect of a sudden increase in light intensity. Bacterio- chlorophyll synthesis is completely, although temporarily, inhibited by the latter compounds. When the growth rate is reduced by lowering the temperature or by addition of 5-methyl-tryptophan there is only a partial inhibition of bacteriochlorophyll formation, Dicoumarol and DNP presumably uncouple phosphorylation and electron transport; consequently, the electron transport chain becomes more oxidized and bacteriochlorophyll synthesis is stopped. However, the specific pigment content will decrease because of continued growth. 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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