@article{fdi:010056624,
  title = {{S}pectral diversity of phycoerythrins and diazotroph abundance in tropical waters},
  author = {{N}eveux, {J}. and {T}enorio, {M}.{M}.{B}. and {D}upouy, {C}{\'e}cile and {V}illareal, {T}.{A}.},
  editor = {},
  language = {{ENG}},
  abstract = {{P}hycoerythrin ({PE}) spectral diversity was investigated in eastern tropical {A}ustralian waters and around {N}ew {C}aledonian and {F}ijian archipelagos. {C}olony sorting of filamentous cyanobacteria revealed slight differences in the {PE} excitation spectrum of {T}richodesmium thiebautii and {T} erythraeum. {S}pectra of {PE} from {K}atagnymene spiralis and {R}ichelia intracellularis were examined for the first time. {PE} spectra of filamentous cyanobacteria ({T}richodesmium, {K}atagnymene, and {R}ichelia) showed a broader phycoerythrobilin ({PEB}) band than those of {S}ynechococcus. {T}he influence of {PE} {T}richodesmium on the global spectrum of {PE} in natural waters was clearly visible at various stations. {T}he {PEB} band was large at the surface and narrower at increased depth, suggesting a shift of the cyanobacterial community from a dominance of diazotrophic filamentous cyanobacteria to small {S}ynechococcus. {S}ize fractionation of water samples confirmed this. {A} good linear relationship was observed between {PE} concentration in the > 10-mu m cellular-size fraction and the abundance of filamentous cyanobacteria expressed by either trichome numbers, total trichome surface area, or total trichome volume. {PE} in the > 10-mu m fraction is a useful tool for rapidly quantifying filamentous cyanobacteria. {N}either diel variations nor photoacclimation significantly influenced the {PE} fluorescence excitation spectra in {T} thiebautii and {T} erythraeum. {U}sing this method, we identified green colonies of filamentous cyanobacteria in deep waters (50-120 m) of the {C}oral {S}ea with a novel high-phycourobilin {PE}. {W}hile morphologically similar to {T}richodesmium, it possesses distinctive photosynthetic responses and could be a new species.},
  keywords = {},
  booktitle = {},
  journal = {{L}imnology and {O}ceanography},
  volume = {51},
  numero = {4},
  pages = {1689--1698},
  ISSN = {0024-3590},
  year = {2006},
  URL = {https://www.documentation.ird.fr/hor/fdi:010056624},
}