In situ community transcriptomics illuminates CO₂-fixation potentials and supporting roles of phagotrophy and proton pump in plankton in a subtropical marginal sea.

ABSTRACT: Lineage-wise physiological activities of plankton communities in the ocean are important but challenging to characterize. Here, we conducted whole-assemblage metatranscriptomic profiling at continental shelf and slope sites in the South China Sea to investigate carbon fixation potential in different lineages. RuBisCO expression, the proxy of Calvin carbon fixation (CCF) potential, was mainly contributed by Bacillariophyta, Chlorophyta, Cyanobacteria, and Haptophyta, which was differentially affected by environmental factors among lineages. CCF potential exhibited positive or negative correlations with phagotrophy gene expression, suggesting phagotrophy possibly enhances or complements CCF. Our data also reveal significant non-Calvin carbon fixation (NCF) potential, as indicated by t

SUBMITTER: Li H 

PROVIDER: S-EPMC10913738 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature