Possible association of diazotrophs with marine zooplankton in the Pacific Ocean.

ABSTRACT: Dinitrogen fixation, the biological reduction in N₂ gas to ammonia contributes to the supply of new nitrogen in the surface ocean. To understand the diversity and abundance of potentially diazotrophic (N₂ fixing) microorganisms associated with marine zooplankton, especially copepods, the nifH gene was studied using zooplankton samples collected in the Pacific Ocean. In total, 257 nifH sequences were recovered from 23 nifH-positive DNA extracts out of 90 copepod samples. The nifH genes derived from cyanobacteria related to Trichodesmium, α- and γ-subdivisions of proteobacteria, and anaerobic euryarchaeota related to Methanosaeta concilii were detected. Our results indicated that Pleuromamma, Pontella, and Euchaeta were the major copepod genera hosting dinitrogen fixers

SUBMITTER: Azimuddin KM 

PROVIDER: S-EPMC5221459 | biostudies-literature | 2016 Dec

REPOSITORIES: biostudies-literature