@article{fdi:010085940,
  title = {{C}ontrasting roles of {DOP} as a source of phosphorus and energy for marine diazotrophs + [{C}orrigendum, 2 p.]},
  author = {{F}ilella, {A}. and {R}iemann, {L}. and {V}an {W}ambeke, {F}. and {P}ulido-{V}illena, {E}. and {V}ogts, {A}. and {B}onnet, {S}ophie and {G}rosso, {O}. and {D}iaz, {J}. {M}. and {D}uhamel, {S}. and {B}enavides, {M}ar},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he oceanic dissolved organic phosphorus ({DOP}) pool is mainly composed of {P}-esters and, to a lesser extent, equally abundant phosphonate and {P}-anhydride molecules. {I}n phosphate-limited ocean regions, diazotrophs are thought to rely on {DOP} compounds as an alternative source of phosphorus ({P}). {W}hile both {P}-esters and phosphonates effectively promote dinitrogen ({N}-2) fixation, the role of {P}-anhydrides for diazotrophs is unknown. {H}ere we explore the effect of {P}-anhydrides on {N}-2 fixation at two stations with contrasting biogeochemical conditions: one located in the {T}onga trench volcanic arc region ("volcano," with low phosphate and high iron concentrations), and the other in the {S}outh {P}acific {G}yre ("gyre," with moderate phosphate and low iron). {W}e incubated surface seawater with {AMP} ({P}-ester), {ATP} ({P}-ester and {P}-anhydride), or 3poly{P} ({P}-anhydride) and determined cell-specific {N}-2 fixation rates, nif{H} gene abundance, and transcription in {C}rocosphaera and {T}richodesmium. {T}richodesmium did not respond to any {DOP} compounds added, suggesting that they were not {P}-limited at the volcano station and were outcompeted by the low iron conditions at the gyre station. {C}onversely, {C}rocosphaera were numerous at both stations and their specific {N}-2 fixation rates were stimulated by {AMP} at the volcano station and slightly by 3poly{P} at both stations. {H}eterotrophic bacteria responded to {ATP} and 3poly{P} additions similarly at both stations, despite the contrasting phosphate and iron availability. {T}he use of 3poly{P} by {C}rocosphaera and heterotrophic bacteria at both low and moderate phosphate concentrations suggests that this compound, in addition to being a source of {P}, can be used to acquire energy for which both groups compete. {P}-anhydrides may thus leverage energy restrictions to diazotrophs in the future stratified and nutrient-impoverished ocean.},
  keywords = {nitrogen fixation ; {T}richodesmium ; {C}rocosphaera ; polyphosphate ; phosphoanhydride ; phosphoester},
  booktitle = {},
  journal = {{F}rontiers in {M}arine {S}cience},
  volume = {9},
  numero = {},
  pages = {923765 [10 ] [+ {C}orrigendum, vol. 10, art.1139310,  2023]},
  year = {2022},
  DOI = {10.3389/fmars.2022.923765},
  URL = {https://www.documentation.ird.fr/hor/fdi:010085940},
}