Growth and H2 production by Synechococcus spp. using organic/inorganic electron donors.

Growth with simultaneous photoproduction of H2 was obtained on various organic and inorganic compounds using axenic cultures of the oxygenic phototrophic bacteria Synechococcus sp. OU 103 and S. cedrorum. Highest H2 production occurred with resting cells of S. cedrorum on malate (11.8 mmol H2/vessel), whereas Synechococcus sp. OU 103 preferred sulphide (10.3 mmol H2/vessel) as electron donor.