期刊
MICROORGANISMS
卷 9, 期 5, 页码 -出版社
MDPI
DOI: 10.3390/microorganisms9051102
关键词
biofilm development; biofilm structure; coccoid cyanobacteria; marine surface materials; epoxy resin; silicone hydrogel
类别
资金
- Laboratory for Process Engineering, Environment, Biotechnology, and Energy-LEPABE - FCT/MCTES (PIDDAC) [UIDB/00511/2020]
- CVMAR+I-Industrial Innovation and Marine Biotechnology Valorization project - INTERREG V Espanha Portugal (POCTEP) [UIDB/04423/2020, 0302_CVMAR_I_1_P]
- SurfSAFE project - European Union's Horizon 2020 research and innovation program [952471]
- FEDER funds through COMPETE2020-Programa Operacional Competitividade e Internacionalizacao (POCI) [PTDC/BII-BIO/29589/2017-POCI-01-0145-FEDER029589]
- national funds (PIDDAC) through FCT/MCTES
Silicone hydrogel surfaces were found to be effective in inhibiting cyanobacterial biofilm formation, with biofilms on these surfaces showing lower cell number, chlorophyll a content, biofilm thickness, and size of biofilm empty spaces. The results indicated that surface properties play a significant role in marine biofouling potential.
Since biofilm formation by microfoulers significantly contributes to the fouling process, it is important to evaluate the performance of marine surfaces to prevent biofilm formation, as well as understand their interactions with microfoulers and how these affect biofilm development and structure. In this study, the long-term performance of five surface materials-glass, perspex, polystyrene, epoxy-coated glass, and a silicone hydrogel coating-in inhibiting biofilm formation by cyanobacteria was evaluated. For this purpose, cyanobacterial biofilms were developed under controlled hydrodynamic conditions typically found in marine environments, and the biofilm cell number, wet weight, chlorophyll a content, and biofilm thickness and structure were assessed after 49 days. In order to obtain more insight into the effect of surface properties on biofilm formation, they were characterized concerning their hydrophobicity and roughness. Results demonstrated that silicone hydrogel surfaces were effective in inhibiting cyanobacterial biofilm formation. In fact, biofilms formed on these surfaces showed a lower number of biofilm cells, chlorophyll a content, biofilm thickness, and percentage and size of biofilm empty spaces compared to remaining surfaces. Additionally, our results demonstrated that the surface properties, together with the features of the fouling microorganisms, have a considerable impact on marine biofouling potential.
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