Plant Community Richness Mediates Inhibitory Interactions and Resource Competition between Streptomyces and Fusarium Populations in the Rhizosphere
| Autor: | Nicholas LeBlanc, H. C. Kistler, Adil Essarioui, Linda L. Kinkel |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Fusarium media_common.quotation_subject 030106 microbiology Soil Science Lespedeza Streptomyces Competition (biology) 03 medical and health sciences Streptomyces isolates Microbial ecology Botany Polyculture Ecology Evolution Behavior and Systematics Ecosystem Soil Microbiology media_common Rhizosphere Ecology biology food and beverages biology.organism_classification Andropogon 030104 developmental biology Agronomy Monoculture |
| Zdroj: | Microbial ecology. 74(1) |
| ISSN: | 1432-184X |
| Popis: | Plant community characteristics impact rhizosphere Streptomyces nutrient competition and antagonistic capacities. However, the effects of Streptomyces on, and their responses to, coexisting microorganisms as a function of plant host or plant species richness have received little attention. In this work, we characterized antagonistic activities and nutrient use among Streptomyces and Fusarium from the rhizosphere of Andropogon gerardii (Ag) and Lespedeza capitata (Lc) plants growing in communities of 1 (monoculture) or 16 (polyculture) plant species. Streptomyces from monoculture were more antagonistic against Fusarium than those from polyculture. In contrast, Fusarium isolates from polyculture had greater inhibitory capacities against Streptomyces than isolates from monoculture. Although Fusarium isolates had on average greater niche widths, the collection of Streptomyces isolates in total used a greater diversity of nutrients for growth. Plant richness, but not plant host, influenced the potential for resource competition between the two taxa. Fusarium isolates had greater niche overlap with Streptomyces in monoculture than polyculture, suggesting greater potential for Fusarium to competitively challenge Streptomyces in monoculture plant communities. In contrast, Streptomyces had greater niche overlap with Fusarium in polyculture than monoculture, suggesting that Fusarium experiences greater resource competition with Streptomyces in polyculture than monoculture. These patterns of competitive and inhibitory phenotypes among Streptomyces and Fusarium populations are consistent with selection for Fusarium-antagonistic Streptomyces populations in the presence of strong Fusarium resource competition in plant monocultures. Similarly, these results suggest selection for Streptomyces-inhibitory Fusarium populations in the presence of strong Streptomyces resource competition in more diverse plant communities. Thus, landscape-scale variation in plant species richness may be critical to mediating the coevolutionary dynamics and selective trajectories for inhibitory and nutrient use phenotypes among Streptomyces and Fusarium populations in soil, with significant implications for microbial community functional characteristics. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink