Amora-producing Geotrichum candidum strain of high-yield exopolysaccharides, exopolysaccharides and volatile flavor compounds

A technology of exopolysaccharide and Geotrichum candidum, which is applied in the field of microorganisms, can solve the problems of the development and application of natural flavors, and achieve the effect of good texture and flavor, increased variety and content, and high exopolysaccharide content
CN102492631AActive Publication Date: 2012-06-13TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
Publication Date
2012-06-13

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Abstract

The invention relates to an amora-producing Geotrichum candidum strain of high-yield exopolysaccharides, the exopolysaccharides and volatile flavor compounds. The strain is named as WGK2-1 and the catalog name of the strain is Geotrichum candidum. By a flat gradient coating separation process, the WGK2-1 strain is screened out from a traditional fermented dairy product. Cow milk is used as a medium to culture the strain at 25-35 DEG C. Therefore, a lot of exopolysaccharides can be generated and can be used as a yogurt starter culture to ferment cow milk. And a lot of volatile flavor compoundscan be generated. The screened strain WGK2-1 of the high-yield exopolysaccharides is an aroma-producing strain, which can generate a plurality of volatile aroma components. The generated volatile flavor compounds are mainly esters and acids and can effectively raise the variety and content of aroma compounds in cow milk, reduce the variety and content of aldehyde and ketone substances and improvethe flavor of fermented milk.
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Description

technical field

[0001] The invention belongs to the field of microbes, and relates to a newly screened strain, in particular to a Geotrichum candidum strain producing high exopolysaccharide, exopolysaccharide and volatile flavor substances. Background technique

[0002] Geotrichum candidum (Geotrichum candidum) is a common fungus, which belongs to the subphylum Deuteromycotina, the family Plexaceae, the family Ovalspora, and the genus Geotrichum. The morphological characteristics of Geotrichum candidum are between yeast and mold, and the reproduction method is mainly fission, with blastospore among a few strains. The growth temperature ranges from 5 to 38°C, the growth pH ranges from 3 to 11, and has wide ecological adaptability. A single Geotrichum candidum has a certain degree of phenotypic variability, different strains within the same species show genetic polymorphism, the colony color ranges from white to cream, a few strains are light brown or dark brown, and the text...

Claims

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