Diversity of culturable moderately halophilic and halotolerant bacteria in a marsh and two salterns a protected ecosystem of Lower Loukkos (Morocco)
Berrada, I.; Willems, A.; De Vos, P.; El Fahime, E.; Swings, J.; Bendaou, N.; Melloul, M.; Amar, M. (2012). Diversity of culturable moderately halophilic and halotolerant bacteria in a marsh and two salterns a protected ecosystem of Lower Loukkos (Morocco). Afr. J. Microbiol. Res. 6(10): 2419-2434. dx.doi.org/10.5897/AJMR-11-1490
In: African Journal of Microbiology Research. Academic Journals: Lagos. ISSN 1996-0808, more
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| Keyword |
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| Author keywords |
Halophilic bacteria; Lower Loukkos; sediment; biodiversity; 16S rRNAgene sequencing; hydrolytic enzymes |
| Authors | | Top |
- Berrada, I.
- Willems, A., more
- De Vos, P., more
- El Fahime, E.
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- Swings, J., more
- Bendaou, N.
- Melloul, M.
- Amar, M.
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| Abstract |
To study the biodiversity of halophilic bacteria in a protected wetland located in Loukkos (Northwest, Morocco), a total of 124 strains were recovered from sediment samples from a marsh and salterns. 120 isolates (98%) were found to be moderately halophilic bacteria; growing in salt ranges of 0.5 to 20%. Of 124 isolates, 102 were Gram-positive while 22 were Gram negative. All isolates were identified based on 16S rRNA gene phylogenetic analysis and characterized phenotypically and by screening for extracellular hydrolytic enzymes. The Gram-positive isolates were dominated by the genus Bacillus (89%) and the others were assigned to Jeotgalibacillus, Planococcus, Staphylococcus and Thalassobacillus. The Gram negative isolates were dominated by the genus Vibrio (41%) and the others were assigned to Halomonas, Psychrobacter, Marinobacterium, Pseudoalteromonas, Salinivibrio and Photobacterium. The growth of strains obtained under different physico-chemical conditions and the screening for hydrolytic enzymes showed a high diversity even within the same species. |
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