In serach of the pH limit of growth in halo-alkaliphilic cyanobacteria

ABSTRACT: We cultivated two halo-alkaliphilic cyanobacteria consortia in chemostats at pH 10.2-11.4. One consortium was dominated by Ca. Sodalinema alkaliphilum, the other by a species of Nodosilinea. These two cyanobacteria dominate natural communities in Canadian and Asian alkaline soda lakes. We show that increasing the pH decreased biomass yield. This decrease was caused, in part, by a dramatic increase in carbon transfer to heterotrophs. At pH 11.4, cyanobacterial growth became limited by bicarbonate uptake, which was mainly ATP-dependent. In parallel, the higher the pH, the more sensitive cyanobacteria became to light, resulting in photoinhibition and upregulation of DNA repair systems.

INSTRUMENT(S): Q Exactive

ORGANISM(S): Nodosilinea Sp. Ata3-4q-cv33 Sodalinema Sp. Pmc 1182.19

SUBMITTER: Lianchun Yi  

LAB HEAD: Marc Strous

PROVIDER: PXD052563 | Pride | 2024-10-17

REPOSITORIES: Pride