Ammonium supply represses iron limitation to support Symbiodiniaceae growth.

ABSTRACT: Nutrient exchanges promote the success of symbioses among reef-building corals, endosymbiotic dinoflagellates (Family: Symbiodiniaceae), and their microbial symbionts. Nutrient dynamics has considerable implications on the metabolism and proliferation of the coral holobiont, with nutrient limitation known to increase the susceptibility of corals to bleaching by disrupting the host-symbiont nutrient exchange. This study examines how two Symbiodiniaceae species, Symbiodinium microadriaticum RT 362 and Cladocopium goreaui RT 152, respond to varying iron (Fe) availability, nitrate (NO₃ ^-), and ammonium (NH₄ ⁺) in batch cultures. Under Fe limitation, phytoplankton growth is reduced when relying on NO₃^- due to the higher Fe req

SUBMITTER: Versola JJN 

PROVIDER: S-EPMC12602481 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature