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Genetic Characterization of Osmotolerant Fermentative Saccharomyces Yeasts from Tanzania Suitable for Industrial Very High Gravity Fermentation

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dc.creator Sumari, Deborah
dc.creator Hosea, Ken M.
dc.creator Magingo, F. S. S.
dc.date 2016-06-26T17:34:56Z
dc.date 2016-06-26T17:34:56Z
dc.date 2010
dc.date.accessioned 2018-03-27T09:00:37Z
dc.date.available 2018-03-27T09:00:37Z
dc.identifier Sumari, D., Hosea, K.M.M. and Magingo, F.S.S., 2010. Genetic characterization of osmotolerant fermentative Saccharomyces yeasts from Tanzania suitable for industrial very high gravity fermentation. African Journal of Microbiology Research, 4(11), pp.1064-1070.
dc.identifier 1996-0808
dc.identifier http://hdl.handle.net/20.500.11810/2762
dc.identifier.uri http://hdl.handle.net/20.500.11810/2762
dc.description Naturally occurring yeasts were sought from diverse Tanzanian environments and screened for industrial application. The yeasts were isolated from environments such as traditional brews and wines from various parts of Tanzania. In this regard, a total of thirty yeast isolates were screened for their suitability in Industrial Very High Gravity Fermentation (VHGF). Five of these isolates were able to grow and ferment medium with 40% initial sucrose concentration. Whereby, three were able to grow and ferment medium with 700 g/Litre (70% w/w) initial sucrose concentration. One of the three isolates coded LB2 isolated from a traditional Makonde sorghum brew was able to ferment a medium with initial sucrose concentration of 1000 g/Litre (100% w/w) at 30°C. On the basis of PCR-RFLP of the internal transcribed spacer (ITS) of the ribosomal DNA (rDNA), all the three most osmotolerant isolates were identified to belong to the Saccharomyces sensu stricto clade. Phylogenetic analysis of the 650 bp D1D2 domain of the large subunit 26S rDNA of the isolate LB2 clustered this isolate away from the so far known typical osmotolerant yeasts. The fermentation by LB2 isolate of 100% gravity substrate observed in this work is higher than any other encountered in the literatures reviewed.
dc.language en
dc.subject Osmotolerant
dc.subject PCR-RFLP
dc.subject Saccharomyces
dc.subject Traditional brews
dc.subject Very High Gravity Fermentation (VHGF)
dc.title Genetic Characterization of Osmotolerant Fermentative Saccharomyces Yeasts from Tanzania Suitable for Industrial Very High Gravity Fermentation
dc.type Journal Article, Peer Reviewed


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