| Autor: |
Pozo, María I., Herrera, Carlos M., Lachance, Marc ‐ André, Verstrepen, Kevin, Lievens, Bart, Jacquemyn, Hans |
| Předmět: |
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| Zdroj: |
Environmental Microbiology; Jun2016, Vol. 18 Issue 6, p1850-1862, 13p |
| Abstrakt: |
Identifying the ecological processes that underlie the distribution and abundance of species in microbial communities is a central issue in microbial ecology and evolution. Classical trade-off based niche theories of resource competition predict that co-occurrence in microbial communities is more likely when the residing species show trait divergence and complementary resource use. We tested the prediction that niche differentiation explained the co-occurrence of two yeast species ( M etschnikowia reukaufii and M . gruessii) in floral nectar. Assessment of the phenotypic landscape showed that both species displayed a significantly different physiological profile. Comparison of utilization profiles in single versus mixed cultures indicated that these two species did not compete for most carbon and nitrogen sources. In mixed cultures, M . reukaufii grew better in sucrose solutions and in the presence of the antimicrobial compound digitonin than when grown as pure culture. M . gruessii, on the other hand, grew better in mixed cultures in glucose and fructose solutions. Overall, these results provide clear evidence that M . reukaufii and M . gruessii frequently co-occur in nectar and that they differ in their phenotypic response to variation in environmental conditions, suggesting that niche differentiation and resource partitioning are important mechanisms contributing to species co-occurrence in nectar yeast communities. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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