@article{fdi:010074079,
  title = {{I}nfluence of bacteria on the response of microalgae to contaminant mixtures},
  author = {{F}ouilland, {E}. and {G}ales, {A}. and {B}eaugelin, {I}. and {L}anouguere, {E}. and {P}ringault, {O}livier and {L}eboulanger, {C}hristophe},
  editor = {},
  language = {{ENG}},
  abstract = {{W}hen microalgae are exposed to contaminants, the role of associated bacteria within the phycosphere, the microenvironment surrounding algal cells, remains largely unknown. {T}he present study investigated the importance of algae-associated bacteria on the responses of microalgae growth to metallic and organic toxicant exposure. {T}he effects of a polluted sediment elutriate, and of metal or pesticide mixtures at environmentally relevant concentrations (<10 mu g {L}-1) were assessed on the growth of two microalgae strains: {I}sochrysis galbana, a prymnesiophyte, and {T}halassiosira delicatula, a centric diatom. {B}oth cultures were maintained as axenic or bacterized under similar conditions in batch cultures. {I}n axenic conditions, the metal mixture addition at low concentrations alleviated limitation of growth by metals for {T} .delicatula relative to control, but inhibited {I}. galbana growth at highest concentration. {I}n similar axenic conditions, both {T}. delicatula and {I}. galbana growth were negatively inhibited by pesticide mixture at concentrations as low as 10 ng {L}-1. {T}he bacterial diversities associated with the two microalgae strains were significantly different ({B}ray-{C}urtis dissimilarity greater than 0.9) but their impact on microalgae growth was similar. {T}he presence of bacteria reduced algal growth rate by ca. 50% compared to axenic cultures, whereas no significant effect of sediment elutriate, metal or pesticide mixtures was noticed on non-axenic algal growth rates. {T}hese results show that bacteria may have a negative effect on algal growth but can reduce pesticide toxicity or metal availability to algae.},
  keywords = {{M}icrobial interactions ; {M}etallic and pesticide contaminants ; {S}ediments ; {TUNISIE} ; {MEDITERRANEE} ; {BIZERTE}},
  booktitle = {},
  journal = {{C}hemosphere},
  volume = {211},
  numero = {},
  pages = {449--455},
  ISSN = {0045-6535},
  year = {2018},
  DOI = {10.1016/j.chemosphere.2018.07.161},
  URL = {https://www.documentation.ird.fr/hor/fdi:010074079},
}