Epiphytic Bacteria Are Essential for the Production and Transformation of Algae-Derived Carboxyl-Rich Alicyclic Molecule (CRAM)-like DOM.

ABSTRACT: The microbial carbon pump (MCP) provides a mechanistic illustration of transformation of recalcitrant dissolved organic matter (DOM) in the ocean. Here, we explored and demonstrated the key roles of algae-associated microorganisms (mainly heterotrophic bacteria) in the production and transformation of carboxyl-rich alicyclic molecule (CRAM)-like DOM through a laboratory experiment involving cultures of Skeletonema dohrnii. Without the participation of the associated bacteria, CRAM-like DOM molecules were not detected via Fourier-transform ion cyclotron resonance mass spectrometry (FT-ICR MS) in algal cultures treated with antibiotics. Similarly, CRAM-like DOM were not detected in cultures of bacteria alone. Our experimental results showed that algae-associated bacteria are important in the

SUBMITTER: Liu Y 

PROVIDER: S-EPMC8528127 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature