@article{fdi:010068922,
  title = {{D}issolved organic matter uptake by {T}richodesmium in the {S}outhwest {P}acific},
  author = {{B}enavides, {M}. and {B}erthelot, {H}. and {D}uhamel, {S}. and {R}aimbault, {P}. and {B}onnet, {S}ophie},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he globally distributed diazotroph {T}richodesmium contributes importantly to nitrogen inputs in the oligotrophic oceans. {S}ites of dissolved organic matter ({DOM}) accumulation could promote the mixotrophic nutrition of {T}richodesmium when inorganic nutrients are scarce. {N}ano-scale secondary ion mass spectrometry (nano{SIMS}) analyses of individual trichomes sampled in the {S}outh {P}acific {O}cean, showed significant {C}-13-enrichments after incubation with either {C}-13-labeled carbohydrates or amino acids. {T}hese results suggest that {DOM} could be directly taken up by {T}richodesmium or primarily consumed by heterotrophic epibiont bacteria that ultimately transfer reduced {DOM} compounds to their host trichomes. {A}lthough the addition of carbohydrates or amino acids did not significantly affect bulk {N}-2 fixation rates, {N}-2 fixation was enhanced by amino acids in individual colonies of {T}richodesmium. {W}e discuss the ecological advantages of {DOM} use by {T}richodesmium as an alternative to autotrophic nutrition in oligotrophic open ocean waters.},
  keywords = {{PACIFIQUE} {SUD} {OUEST}},
  booktitle = {},
  journal = {{S}cientific {R}eports - {N}ature},
  volume = {7},
  numero = {},
  pages = {art. 41315 [6 p.]},
  ISSN = {2045-2322},
  year = {2017},
  DOI = {10.1038/srep41315},
  URL = {https://www.documentation.ird.fr/hor/fdi:010068922},
}