Format

Send to

Choose Destination
FEMS Yeast Res. 2004 Jan;4(4-5):521-5.

Sympatric natural Saccharomyces cerevisiae and S. paradoxus populations have different thermal growth profiles.

Author information

1
Department of Biology, University of Pennsylvania, 415 S. University Avenue, Philadelphia, PA 19104, USA.

Abstract

Saccharomyces cerevisiae and its close congener S. paradoxus are typically indistinguishable by the phenotypic criteria of classical yeast taxonomy, but they are evolutionarily distinct as indicated by hybrid spore inviability and genomic sequence divergence. Previous work has shown that these two species coexist in oak-associated microhabitats at natural woodland sites in North America. Here, we show that sympatric populations of S. cerevisiae and S. paradoxus from a single natural site are phenotypically differentiated in their growth rate responses to temperature. Our main finding is that the S. cerevisiae population exhibits a markedly higher growth rate at 37 degrees C than the S. paradoxus population; we also find possible differences in growth rate between these populations at two lower temperatures. We discuss the implications of our results for the coexistence of these yeasts in natural environments, and we suggest that thermal growth response may be an evolutionarily labile feature of these organisms that could be analyzed using genomic approaches.

PMID:
14734033
DOI:
10.1016/S1567-1356(03)00171-5
[Indexed for MEDLINE]
Free full text

Supplemental Content

Full text links

Icon for Silverchair Information Systems Icon for Wiley
Loading ...
Support Center