Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Identification of lactic acid bacteria isolated from vinegar flies and Merlot grapes
Thesis (MSc)--University of Stellenbosch, 2005.
Saved in:
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Thesis |
| Language: | en_ZA |
| Published: |
Stellenbosch : University of Stellenbosch
2011
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613897391865856 |
|---|---|
| access_status_str | Open Access |
| author | Groenewald, W. H. |
| author2 | Dicks, Leon Milner Theodore |
| author_browse | Dicks, Leon Milner Theodore Groenewald, W. H. |
| author_facet | Dicks, Leon Milner Theodore Groenewald, W. H. |
| author_sort | Groenewald, W. H. |
| collection | Thesis |
| dc_rights_str_mv | University of Stellenbosch |
| description | Thesis (MSc)--University of Stellenbosch, 2005. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/16606 |
| institution | Stellenbosch University (South Africa) |
| language | en_ZA |
| last_indexed | 2026-06-10T12:43:26.328Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2011 |
| publishDateRange | 2011 |
| publishDateSort | 2011 |
| publisher | Stellenbosch : University of Stellenbosch |
| publisherStr | Stellenbosch : University of Stellenbosch |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/16606 Identification of lactic acid bacteria isolated from vinegar flies and Merlot grapes Groenewald, W. H. Dicks, Leon Milner Theodore University of Stellenbosch. Faculty of Science. Dept. of Microbiology. Lactic acid bacteria -- Identification Drosophilidae -- Microbiology Grapes -- Microbiology Theses -- Microbiology Dissertations -- Microbiology Thesis (MSc)--University of Stellenbosch, 2005. ENGLISH ABSTRACT: Thirty lactic acid bacteria were isolated from the intestinal tract of Drosophila simulans Stuvervant and nine lactic acid bacteria from Merlot grapes collected from the same winery in the Stellenbosch region, South Africa. The isolates were grouped according to morphological, biochemical and physiological characteristics. Isolates selected from each group were identified to species level by PCR with species-specific primers, PCR-based DGGE and 16S rDNA sequencing. The majority of isolates from the intestinal tract of Drosophila simulans Stuvervant belonged to the species Lactobacillus plantarum, but Lactobacillus paracasei, Lactobacillus sanfranciscensis, Leuconostoc mesenteroides subsp. mesenteroides, Lactococcus lactis subsp. lactis, Enterococcus faecalis and Pediococcus pentosaceus were also identified. As far as we could determine, this is the first report on the isolation of L. paracasei, L. sanfranciscensis, L. mesenteroides subsp. mesenteroides, L. lactis subsp. lactis, E. faecalis and P. pentosaceus from vinegar flies. Lactobacillus plantarum has previously been isolated from Merlot grapes. The genotypic relatedness among isolates of L. plantarum isolated from the intestinal tract of vinegar flies and from Merlot grapes were determined by RAPD-PCR. The isolates were grouped into four genotypically well-separated clusters. Thirteen isolates from grape must and five from flies yielded identical RAPD-PCR banding patterns and grouped into one cluster, suggesting that they are descendants from the same strain. This suggests that L. plantarum has the ability to use vinegar flies as a vector. AFRIKAANSE OPSOMMING: Dertig melksuurbakterieë is vanuit die dermkanaal van Drosophila simulans Stuvervant geïsoleer en nege melksuurbakterieë vanuit Merlot-druiwe. Die druiwe is afkomstig van dieselfde wynkelder in die Stellenbosch-area van Suid-Afrika. Die isolate is volgens morfologiese, biochemiese en fisiologiese eienskappe gegroepeer. Verteenwoordigende isolate vanuit die fenotipiese groepe is tot spesievlak met behulp van lukraak ge-amplifiseerde polimorfe-DNA (RAPD) polimerase ketting-reaksie (PKR), PKR met spesie-spesifieke inleiers, PKR-gebaseerde denaturerende gradient-jel elektroforese (DGGE) en 16S rDNA sekwensering geïdentifiseer. Die meerderheid isolate uit die ingewande van Drosophila simulans Stuvervant is as Lactobacillus plantarum geklassifiseer. Stamme van Lactobacillus paracasei, Lactobacillus sanfranciscensis, Leuconostoc mesenteroides subsp. mesenteroides, Lactococcus lactis subsp. lactis, Enterococcus faecalis en Pediococcus pentosaceus is ook geïdentifiseer. Sover bekend, is dit die eerste keer dat L. paracasei, L. sanfranciscensis, L. mesenteroides subsp. mesenteroides, L. lactis subsp. lactis, E. faecalis en P. pentosaceus uit asynvlieë geïsoleer is. Lactobacillus plantarum is voorheen uit Merlot-druiwe geïsoleer. Die genotipiese ooreenkoms tussen die stamme van L. plantarum wat uit die asynvlieë en Merlot-druiwe geïsoleer is, is deur middel van RAPD-PKR bepaal. Hiervolgens is die stamme in vier genotipies goed-gedefinieerde groepe geplaas. Dertien isolate vanuit druiwemos en vyf vanuit asynvlieë het identiese RAPD-PKR bandpatrone vertoon en het in een groep gesorteer. Hierdie resultate dui daarop dat die stamme heel moontlik uit een voorouer ontstaan het en dat asynvlieë heel moontlik as vektor vir L. plantarum dien. 2011-10-11T09:36:27Z 2011-10-11T09:36:27Z 2011-10 Thesis http://hdl.handle.net/10019.1/16606 en_ZA University of Stellenbosch vi, 95 leaves : ill. application/pdf Stellenbosch : University of Stellenbosch |
| spellingShingle | Lactic acid bacteria -- Identification Drosophilidae -- Microbiology Grapes -- Microbiology Theses -- Microbiology Dissertations -- Microbiology Groenewald, W. H. Identification of lactic acid bacteria isolated from vinegar flies and Merlot grapes |
| title | Identification of lactic acid bacteria isolated from vinegar flies and Merlot grapes |
| title_full | Identification of lactic acid bacteria isolated from vinegar flies and Merlot grapes |
| title_fullStr | Identification of lactic acid bacteria isolated from vinegar flies and Merlot grapes |
| title_full_unstemmed | Identification of lactic acid bacteria isolated from vinegar flies and Merlot grapes |
| title_short | Identification of lactic acid bacteria isolated from vinegar flies and Merlot grapes |
| title_sort | identification of lactic acid bacteria isolated from vinegar flies and merlot grapes |
| topic | Lactic acid bacteria -- Identification Drosophilidae -- Microbiology Grapes -- Microbiology Theses -- Microbiology Dissertations -- Microbiology |
| url | http://hdl.handle.net/10019.1/16606 |
| work_keys_str_mv | AT groenewaldwh identificationoflacticacidbacteriaisolatedfromvinegarfliesandmerlotgrapes |