INVESTIGADORES
MARCHELLI Paula
artículos
Título:
Yeast and yeast-like fungi associated with dry indehiscent fruits of a tree species in patagonia, Argentina.
Autor/es:
FERNANDEZ, N.V.; MESTRE, M.C.; MARCHELLI, P.; FONTENLA, S
Revista:
FEMS MICROBIOLOGY ECOLOGY
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Lugar: Londres; Año: 2012 vol. 80 p. 179 - 192
ISSN:
0168-6496
Resumen:
Nothofagus nervosa (Raulı´) is a native tree species that yields valuable timber. It
was overexploited in the past and is currently included in domestication and
conservation programs. Several research programs have focused on the characterization
of epiphytic microorganisms because it has been demonstrated that
they can affect plantpathogen interactions and/or promote plant growth.
Although the microbial ecology of leaves has been well studied, less is known
about microorganisms occurring on seeds and noncommercial fruits. In this
work, we analyzed the yeast and yeast-like fungi present on N. nervosa fruits
destined for the propagation of this species, as well as the effects of fruit preservation
and seed dormancy-breaking processes on fungal diversity. Morphological
and molecular methods were used, and differences between fungal
communities were analyzed using a similarity index. A total of 171 isolates corresponding
to 17 species were recovered, most of which belong to the phylum
Ascomycota. The majority of the species develop mycelia, produce pigments
and mycosporines, and these adaptation strategies are discussed. It was
observed that the preservation process considerably reduced yeast and yeast-like
fungal diversity. This is the first study concerning microbial communities associated
with this ecologically and economically important species, and the information
presented is relevant to domestication programs.