Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1999-7-16
pubmed:abstractText
There is still a lack of agreement concerning the relative contribution of wine yeast that may originate in the vineyard compared to that which may originate in the cellar. Part of this controversy is due to the extreme difficulty of finding Saccharomyces cerevisiae on the grapes. We estimate that only about one in one-thousand grape berries carries wine yeast. However, we have found that grape berries that are damaged (i.e. the skin is broken) are very rich depositories of microorganisms including S. cerevisiae, and that one in four such berries is S. cerevisiae-positive. These positive berries have between 100,000 and 1,000,000 wine yeast cells on them, and there is evidence that these yeasts are clonal. We believe that the yeasts are brought to the berries by insects such as bees, wasps, and Drosophila and that they multiply in the rich medium of the grape interior. Even though there are many cells of S. cerevisiae on the damaged berries, they are in a definite minority. All the other organisms that are found in wine fermentations are also present on these berries, and their total numbers are in the range of 10 million to 100 million cells per berry.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0923-2508
pubmed:author
pubmed:issnType
Print
pubmed:volume
150
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
199-204
pubmed:dateRevised
2003-11-14
pubmed:meshHeading
pubmed:year
1999
pubmed:articleTitle
On the origins of wine yeast.
pubmed:affiliation
Department of Molecular and Cell Biology, University of California, Berkeley 94720, USA.
pubmed:publicationType
Journal Article