Abstract
Halobacteria depend on high concentrations of NaC1 for growth and survival. They occur naturally in environments such as salt lakes, where the salt concentration due to evaporation is near or at saturation. Typically, the temperature and solar radiation density are high in such locations, at least during the day, and the O2 concentration in the brine must be low unless O2-producing halophilic algae are present. Most halobacteria do not contain chlorophyll, and it was rather puzzling to observe that many of them do not ferment sugars either and appear to rely entirely on oxidative phosphorylation as their energy source (for a review, see LARSEN, 1963, 1967). The solution to this puzzle has been provided by the observation that halobacteria can use light energy to drive metabolic processes through a chlorophyll-independent mechanism.
This research was supported by NHLI Program Project Grant HL-06285 and NASA Life Scientist Grant NGL 05–025–014. We thank Arlette Danon and San-Bao Hwang for permission to reproduce data that were obtained in collaboration.
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Stoeckenius, W., Bogomolni, R.A., Lozier, R.H. (1975). Light Energy Transduction in Halobacterium halobium . In: Kaback, H.R., Neurath, H., Radda, G.K., Schwyzer, R., Wiley, W.R. (eds) Molecular Aspects of Membrane Phenomena. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-66224-9_22
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