Diversity of Culturable Alkaliphilic Denitrifying Bacteria in Four Soda Lakes of Ethiopia

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dc.contributor.advisorGessesse, Amare(PhD)
dc.contributor.authorTilahun, Lulit
dc.date.accessioned2018-07-03T11:52:15Z
dc.date.accessioned2023-11-18T09:50:12Z
dc.date.available2018-07-03T11:52:15Z
dc.date.available2023-11-18T09:50:12Z
dc.date.issued2010-12
dc.description.abstractDenitrifying bacteria (95 in number) were isolated from the four Soda Lakes of Ethiopia namely, Lake Abijata, Lake Arenguade, Lake Chitu and Lake Shalla. Similar species of denitrifying bacteria were identified from the four lakes. The sequence and phylogeny relation of the isolates show that Halomonas campisalis, Halomonas salina, Halomonas nitritophilus, Bacillus cohnii as well as Bacillus pseudofirmus exhibited high similarities with the isolates studied. In addition, 9 isolates from the four lakes show similarity with the novel bacterial group, Nitricola lacisaponesis. Fast denitrifyers were among the isolates that are capable of producing N2 gas only in 2 hours after inoculation. Molecular, morphological and some biochemical studies conducted on the DN-C18 isolate from L. Chitu, showed high similarity on all accounts with previously obtained isolate BACC180 from L. Chitu. These two isolates showed high denitrification activity and tolerance to high pH and salt concentration. Both isolates were found to be closely related the Halomonas sp. Key words: denitrification; alkaliphilic denitrifiers; soda lakes; Lake Abijata; Lake Arenguade; Lake Chitu; Lake Shalla; Halomonas; Bacillus; Nitricola lacisaponesisen_US
dc.identifier.urihttp://etd.aau.edu.et/handle/12345678/5942
dc.language.isoenen_US
dc.publisherAddis Ababa Universityen_US
dc.subjectdenitrificationen_US
dc.subjectalkaliphilic denitrifiersen_US
dc.subjectsoda lakesen_US
dc.subjectLake Abijataen_US
dc.subjectLake Arenguadeen_US
dc.subjectLake Chituen_US
dc.subjectLake Shallaen_US
dc.subjectHalomonasen_US
dc.subjectBacillusen_US
dc.subjectNitricola lacisaponesisen_US
dc.titleDiversity of Culturable Alkaliphilic Denitrifying Bacteria in Four Soda Lakes of Ethiopiaen_US
dc.typeThesisen_US

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