Photoproduction d'hydrogene par une souche de bacteries phototrophes sulfureuses marines

H sub(2) evolution from sulfur and organic compounds by Ectothiorhodospira) strain BA1011 has been investigated. Ectothiorhodospira strain BA1011 produces hydrogen from sulfide, thiosulfate and some organic acids such as propionate, acetate, lactate and succinate. Major characteristics are defined from sulfide: experiments show a correlation between photohydrogen production and CO sub(2) assimilation as well as an increase of the utilization of endogeneous and exogeneous organic substrates with sulfide as electron donor.