Transcriptional patterns identify resource controls on the diazotroph Trichodesmium in the Atlantic and Pacific oceans.

ABSTRACT: The N₂-fixing cyanobacterium Trichodesmium is intensely studied because of the control this organism exerts over the cycling of carbon and nitrogen in the low nutrient ocean gyres. Although iron (Fe) and phosphorus (P) bioavailability are thought to be major drivers of Trichodesmium distributions and activities, identifying resource controls on Trichodesmium is challenging, as Fe and P are often organically complexed and their bioavailability to a single species in a mixed community is difficult to constrain. Further, Fe and P geochemistries are linked through the activities of metalloenzymes, such as the alkaline phosphatases (APs) PhoX and PhoA, which are used by microbes to access dissolved organic P (DOP). Here we identified significant correlations between Trichodesmium-spe

SUBMITTER: Rouco M 

PROVIDER: S-EPMC5956094 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature