ORTALO-MAGNE Annick

Articles

• ORTALO-MAGNE Annick
  3 June 2016

  Research Topics Marine biofilms, EPS, Polysaccharides Structural biochemistry

• Bioindication of Mediterranean coastal environments associated with biofilms
  30 March 2021, by JFB

  Acronym :
  BIOFINDIC Funding :
  Agence de l’Eau RMC Short Overview:
  L’objectif du projet est d’étudier le potentiel des biofilms comme outil de bioindication de la qualité des masses d’eau méditerranéennes côtières. Elle repose sur deux parties complémentaires : (1) une étude directement couplée à la campagne en mer SUCHIMED, opéré par l’IFREMER, sur les biofilms qui auront colonisés 150 plaques A4 en PE immergées du 16 mars au 7 juillet 2021 sur 50 sites le long des 1800 km des côtes (…)

• Impact of phosphate starvation on the metabolome of the biofilm-forming marine bacterium Pseudoalteromonas lipolytica
  24 May 2022
• Shear stress controls prokaryotic and eukaryotic biofilm communities together with EPS and metabolomic expression in a semi‑controlled coastal environment in the NW Mediterranean Sea
  20 December 2024, by JFB
• Design of molecularly imprinted polymers with anti-quorum sensing properties
  6 January, by CaB
• Discrimination of four marine biofilm-forming bacteria by LC-MS metabolomics and influence of culture parameters
  31 March 2017

  Most marine bacteria can form biofilms, and they are the main components of biofilms observed on marine surfaces. Biofilms constitute a widespread life strategy, as growing in such structures offers many important biological benefits. The molecular compounds expressed in biofilms and, more generally, the metabolomes of marine bacteria remain poorly studied. In this context, a nontargeted LC–MS metabolomics approach of marine biofilm-forming bacterial strains was developed. Four marine bacteria, Persicivirga (Nonlabens) mediterranea TC4 and TC7, Pseudoalteromonas lipolytica TC8, and Shewanella sp. TC11, were used as model organisms. The main objective was to search for some strain-specific bacterial metabolites and to determine how culture parameters (culture medium, growth phase, and mode of culture) may affect the cellular metabolism of each strain and thus the global interstrain metabolic discrimination. LC–MS profiling and statistical partial least-squares discriminant analyses showed that the four strains could be differentiated at the species level whatever the medium, the growth phase, or the mode of culture (planktonic vs biofilm). A MS/MS molecular network was subsequently built and allowed the identification of putative bacterial biomarkers. TC8 was discriminated by a series of ornithine lipids, while the P. mediterranea strains produced hydroxylated ornithine and glycine lipids. Among the P. mediterranea strains, TC7 extracts were distinguished by the occurrence of diamine derivatives, such as putrescine amides.

• Marine biofilms as biological indicators of the seawater chemical quality of Mediterranean French coasts
  15 December 2022, by JFB
• Metabolome and proteome changes between biofilm and planktonic phenotypes of the marine bacterium Pseudoalteromonas lipolytica TC8
  16 January 2018
• Impact de l’hydrodynamisme sur la structure des communautés et l’expression métabolique de biofilms dans la ria d’Etel (Atlantique, Bretagne)
  25 August 2023, by JFB
• Dans quelle mesure les communautés free-living et particle-attached contribuent-elles à la diversité de biofilms formés sur des microplastiques en polyéthylène en milieu marin ?
  25 August 2023, by JFB