@article{fdi:010090122,
  title = {{S}inglet oxygen-induced alteration of bacteria associated with phytodetritus : effect of irradiance},
  author = {{B}urot, {C}. and {B}onin, {P}. and {S}imon, {G}. and {C}asalot, {L}aurence and {R}ontani, {J}. {F}.},
  editor = {},
  language = {{ENG}},
  abstract = {{C}ontrasting irradiation of senescent cells of the diatom {T}halassiosira sp. in association with the bacterium {P}seudomonas stutzeri showed the effect of intensity of irradiance on the transfer of singlet oxygen ({O}-1(2)) to bacteria attached to phytoplanktonic cells. {U}nder low irradiances, {O}-1(2) is produced slowly, favors the oxidation of algal unsaturated lipids (photodynamic effect), and limits {O}-1(2) transfer to attached bacteria. {H}owever, high irradiances induce a rapid and intense production of {O}-1(2), which diffuses out of the chloroplasts and easily reaches the attached bacteria, where it efficiently oxidizes their unsaturated membrane components. {A}nalysis of numerous sinking particle samples collected in different regions of the {C}anadian {A}rctic showed that the photooxidation state of attached bacteria increased from ice-covered areas to open water, in agreement with in vitro results. {P}hotooxidation of bacteria appeared to be particularly intense in sea ice, where the sympagic algae-bacteria association is maintained at relatively high irradiances for long periods of time.},
  keywords = {{A}rctic ; attached bacteria ; irradiance effect ; sea ice ; senescent ; phytoplankton ; sinking particulate matter ; type {II} photosensitized oxidation ; {CANADA} ; {ARCTIQUE}},
  booktitle = {},
  journal = {{J}ournal of {P}hycology},
  volume = {[{E}arly access]},
  numero = {},
  pages = {[9 p.]},
  ISSN = {0022-3646},
  year = {2023},
  DOI = {10.1111/jpy.13376},
  URL = {https://www.documentation.ird.fr/hor/fdi:010090122},
}