Environmental conditions shape the biofilm of the Antarctic bacterium Pseudoalteromonas haloplanktis TAC125

Diauxie and co-utilization of carbon sources can coexist during bacterial growth in nutritionally complex environments

“…Second, the increase of sugar/amino sugars intracellular concentrations might have a role in PhTAC125 cell aggregation when nutrients concentration starts to deplete given that: (i) such metabolites are known to be involved in cell-cell contacts 37 , (ii) PhTAC125 was shown to produce a biofilm that incorporates amino sugars and (iii) this is supposed to be a strategy to survive in poor nutrient conditions 37 . Our findings are in line with a scenario in which the presence of a lower availability of nutrients induces a greater production of biofilm since the biofilm matrix can improve the capture of nutrients 38 .…”

The FT-IR and Raman Spectroscopies as Tools for Biofilm Characterization Created by Cariogenic Streptococci

“…strain [16]. It has also been applied to characterization of the typology and matrix composition of biofilm produced by Pseudoalteromonas haloplanktis TAC125 in the context of environmental and cold adaptation [17]. In the field of dentistry, it can be used to assess the mineral properties of calcified tissue [18], examine the hydroxyapatite single crystallites [19], compare dental tissues, including enamel and dentin [20], and characterize hydroxylated phosphates [21].…”

Extracellular polymeric substances in Antarctic environments: A review of their ecological roles and impact on glacier biogeochemical cycles

“…The EPS facilitates cell survival, improves metabolic efficiency and provides microbes housed within it, the protection from a range of physical, chemical and biological stresses, enabling cells to cope with changing stress types and levels (Ricciardelli et al, 2019). For example, microbes within microbial mats (specialised biofilms comprising many microbial groups that are laterally compressed into a thin multilayered mat that range from several millimeters to a centimeter thick) that are exposed to high levels of direct UVA (320-400 nm) and UVB (280-320 nm) radiation, produce protective pigments (George et al, 2001) to counter UV induced cell damage (Rothschild, 1999).…”