New cyanobacterial strains for biohydrogen production

Abstract

Under certain conditions, cyanobacteria can switch from photosynthesis to hydrogen production, which is a good energy carrier. However, the biological diversity of hydrogen-releasing cyanobacteria has a great unexplored potential. This study is aimed to investigate the ability of new strains of cyanobacteria Cyanobacterium sp. IPPAS B-1200, Dolichospermum sp. IPPAS B-1213, and Sodalinema gerasimenkoae IPPAS B-353 to release H<inf>2</inf> and to evaluate the effects of photosystem II inhibitor 3-(3,4-dichlorphenyl)-1,1-dimethylurea (DCMU) on H<inf>2</inf> production under light and dark conditions. The results showed that cultures treated with DCMU produced several times more H<inf>2</inf> than untreated cells. The highest rate of H<inf>2</inf> photoproduction of 4.24 μmol H<inf>2</inf> (mg Chl a h)−1 was found in a Dolichospermum sp. IPPAS B-1213 culture treated with 20 μM DCMU. © 2023 Elsevier B.V., All rights reserved.