Differentiation of Saccharomyces cerevisiae populations from vineyards of the Azores Archipelago: Geography vs Ecology.
Food Microbiol
; 74: 151-162, 2018 Sep.
Article
en En
| MEDLINE
| ID: mdl-29706331
Aiming to elucidate the roles that ecology and geography play in shaping the differentiation of fermentative grape-associated Saccharomyces cerevisiae populations, several locations on six islands of the Azores Archipelago were surveyed. A total of 249 strains were isolated from spontaneous fermentations of grape samples from several varieties of two distinct grapevine species (Vitis vinifera L. and Vitis labrusca L.), in vineyards that are under regular cultivation or in abandoned vineyards. Strains were genetically analyzed using a set of nine microsatellite loci, and also phenotypically characterized using relevant physiological/biotechnological tests. Results showed that genetic divergence among populations of the same island was lower than from populations from different islands. Phenotypic comparison of the populations from each of the islands revealed significant differences between them. Strains isolated from the islands with more intensive viticultural activity - Pico, Terceira and Graciosa - showed higher levels of SO2 tolerance, possibly resulting from selection by human activity. The percentage of strains producing low levels of H2S was higher in S. Jorge (60%). Our findings were supported both by genetic and phenotypic data and provide clear evidence for the prevailing role of the geography over ecology in the differentiation of S. cerevisiae populations in the Azores Archipelago.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Saccharomyces cerevisiae
/
Variación Genética
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Vitis
/
Ecología
/
Geografía
Límite:
Humans
Idioma:
En
Revista:
Food Microbiol
Asunto de la revista:
CIENCIAS DA NUTRICAO
/
MICROBIOLOGIA
Año:
2018
Tipo del documento:
Article
País de afiliación:
Portugal
Pais de publicación:
Reino Unido