The Fate of Marine Bacterial Exopolysaccharide in Natural Marine Microbial Communities

• DOI: 10.1371/journal.pone.0142690
• Publication Date: 2015-11-16T22:54:09Z
• Authors: Zilian Zhang; Yi Chen; Rui Wang; Ruanhong Cai; Yingnan Fu; Nianzhi Jiao
• Keywords: Alteromonas; Marine bacteriophage; Microbial Metabolism

Most marine bacteria produce exopolysaccharides (EPS), and bacterial EPS represent an important source of dissolved organic carbon in ecosystems. It was proposed that rich uronic acid is resistant to mineralization by microbes thus has a long residence time global oceans. To confirm this hypothesis, galacturonic isolated from Alteromonas sp. JL2810. The used amend natural seawater investigate the bioavailability native populations, presence absence ammonium phosphate amendment. data indicated could not be completely consumed during cultivation period only determined its intrinsic properties, but also other factors such as availability inorganic nutrients. During experiment, humic-like component fluorescent matter (FDOM) freshly produced. Bacterial community structure analysis class Flavobacteria phylum Bacteroidetes major contributor for utilization EPS. This report first indicate are degradation. fraction utilized FDOM (e.g., humic acid-like substances) produced de novo may refractory contribute storage