How haptophytes microalgae mitigate vitamin B limitation.

Vitamin B (cobalamin) can control phytoplankton development and community composition, with around half of microalgal species requiring this vitamin for growth. B dependency is determined by the absence of cobalamin-independent methionine synthase and is unrelated across lineages. Despite their important role in carbon and sulphur biogeochemistry, little is known about haptophytes utilization of vitamin B and their ability to cope with its limitation.