Sharing Vitamin B₁₂ between Bacteria and Microalgae Does Not Systematically Occur: Case Study of the Haptophyte Tisochrysis lutea.

ABSTRACT: Haptophyte microalgae are key contributors to microbial communities in many environments. It has been proposed recently that members of this group would be virtually all dependent on vitamin B₁₂ (cobalamin), an enzymatic cofactor produced only by some bacteria and archaea. Here, we examined the processes of vitamin B₁₂ acquisition by haptophytes. We tested whether co-cultivating the model species Tisochrysis lutea with B₁₂-producing bacteria in vitamin-deprived conditions would allow the microalga to overcome B₁₂ deprivation. While T. lutea can grow by scavenging vitamin B₁₂ from bacterial extracts, co-culture experiments showed that the algae did not receive B₁₂ from its associated bacteria, despite bacteria/a

SUBMITTER: Nef C 

PROVIDER: S-EPMC9323062 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature