Publications by authors named "Najwa Kallel"
We investigated the efficiency of a benthic diatom-associated bacteria in removing benzo(a)pyrene (BaP) and fluoranthene (Flt). The diatom, isolated from a PAH-contaminated sediment of the Bizerte Lagoon (Tunisia), was exposed in axenic and non-axenic cultures to PAHs over 7 days. The diversity of the associated bacteria, both attached (AB) and free-living bacteria (FB), was analyzed by the 16S rRNA amplicon sequencing.
View Article and Find Full Text PDFThe screening of bacteria and archaea from Chott El Jerid, a hypersaline lake in the south of Tunisia, led to the isolation of 68 extremely halophilic prokaryotes growing in media with 15-25% of salt. Assessment of 68 partial 16S rRNA analyzed by amplified rDNA restriction analysis (ARDRA) revealed 15 different bacterial and archaeal taxonomic groups. Based on ARDRA results, phenotypic and hydrolytic activity tests, 20 archaeal and 6 bacterial isolates were selected for sequencing.
View Article and Find Full Text PDFArticle Synopsis
- Chott El Jerid is a large hypersaline lake in the Tunisian Sahara, studied for its microbial diversity during flooding.
- Molecular methods, including 16S rRNA gene analysis and qPCR, revealed that Proteobacteria dominated the bacterial community, while Archaea, particularly Halobacteria and sulfate-reducing Archaea, were more abundant than Bacteria.
- The study highlights the significant role of sulfate-reducing bacteria in this unique hypersaline ecosystem, outnumbering methanogens.