INVESTIGADORES
LIBKIND FRATI Diego
artículos
Título:
Xanthophyllomyces dendrorhous (Phaffia rhodozyma) on stromata of Cyttaria hariotii in Patagonian Nothofagus forests.
Autor/es:
LIBKIND, D; TOGNETTI, C; RUFFINI, A; SAMPAIO, JP; VAN BROOCK, MR
Revista:
REVISTA ARGENTINA DE MICROBIOLOGÃA
Editorial:
ASOCIACION ARGENTINA MICROBIOLOGIA
Referencias:
Lugar: Buenos Aires; Año: 2011 vol. 43 p. 226 - 232
ISSN:
0325-7541
Resumen:
The occurrence and distribution of Xanthophyllomyces dendrorhous associated with Cyttaria hariotii parasitizing three
Nothofagus species (N. dombeyi, N. antarctica and N. pumilio) in northwestern Patagonia (Argentina), as well as the
factors that may affect this distribution were herein studied. Between 2000 and 2007, samples were obtained from 18
different locations. Based on physiological tests and morphological characteristics of sexual structures, 72 isolates
were identified as X. dendrorhous. Representative strains were studied by MSP-PCR fingerprinting and sequence
analysis of the ITS region. MSP-PCR fingerprints were similar for the newly isolated strains, and were also identical
to the profiles of the strains previously found in this region. Patagonian strains appear to be a genetically uniform and
distinct population, supporting the hypothesis that the association with different host species has determined genetically
distinct X. dendrorhous populations worldwide. X. dendrorhous was recovered from N. dombeyi and N. antarctica.
Approximately half the sampling sites and samples were positive for X. dendrorhous, but the isolation recovery rate
was low. X. dendrorhous was absent in the early stages of ascostromata maturation, becoming more abundant in
later stages. The present work represents a step forward in the understanding of the natural distribution and ecology
of this biotechnologically relevant yeast.