Identifying the active microbes driving organosulfur cycling from taurine and methionine in marine sediment.

ABSTRACT: Studies on microbial sulfur cycling in marine sediment have primarily centered on the cycling of inorganic sulfur. The microbial diversity underlying the cycling of organosulfur compounds is largely unexplored. In this study, we present the first quantification of dissolved organic sulfur (DOS) microbial assimilation in marine surface sediments using ¹³C-DOS quantitative DNA stable isotope probing (qSIP). We sampled marine sediment from 493 m water depth on the Puerto Rico continental slope, measured ¹³C-assimilation from two DOS substrates (¹³C-taurine and ¹³C-methionine), and compared the ¹³C-DOS assimilation to ¹³C-glucose uptake. Taurine utilization was confined to bacteria, whereas methionine was degraded by bacteria an

SUBMITTER: Coskun OK 

PROVIDER: S-EPMC11905757 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature