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- W2003408875 abstract "Through laboratory experiments, we tested whether UV radiation (UVR) induces filamentation in natural bacteria assemblages from North Andean Patagonian lakes. We incubated water from three different lakes for 72 h in four separate treatments: (1) UVR + PAR (photosynthetically active radiation), (2) 50% UVR + PAR, (3) PAR and (4) 50% PAR. The irradiance levels used in the experiments were equivalent to those registered at the epilimnion of the lakes. In the UVR treatments filamentation was induced after the first 24 h and the proportion continued to increase for the next 48-72 h. A comparison of the gross composition and diversity of the entire community (cells >0.2 microm) with bacterial filaments alone (>5.0 microm) showed that UVR-induced filamentation is not a feature of any particular cluster. By sequencing part of the 16S rRNA gene of the taxonomic units obtained using denaturing gels, we observed that strains in the beta-Proteobacteria group were of relatively high importance in filament formation, followed by Cytophaga-Flavobacterium-Bacteroides, gamma-Proteobacteria and alpha-Proteobacteria, whereas Actinobacteria were almost nonexistent in the filaments. We propose that UVR doses equivalent to those of Andean lakes produce bacterial morphological changes, and that all bacterial groups except Actinobacteria can potentially form filaments." @default.
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- W2003408875 date "2010-07-01" @default.
- W2003408875 modified "2023-10-06" @default.
- W2003408875 title "Ultraviolet Radiation Induces Filamentation in Bacterial Assemblages from North Andean Patagonian Lakes" @default.
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- W2003408875 doi "https://doi.org/10.1111/j.1751-1097.2010.00758.x" @default.
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