Intraspecific competition between ectomycorrhizalPisolithus microcarpusisolates impacts plant and fungal performance under elevated CO2and temperature
| Autor: | Anna R. Simonin, Sara Hortal, Ian C. Anderson, Jeff R. Powell, Jonathan M. Plett |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Hot Temperature Climate Change media_common.quotation_subject Plant Roots 010603 evolutionary biology 01 natural sciences Applied Microbiology and Biotechnology Microbiology Intraspecific competition Competition (biology) Ectosymbiosis Symbiosis Mycorrhizae Botany Mycorrhiza Mycelium media_common Abiotic component Eucalyptus Ecology biology Basidiomycota fungi Carbon Dioxide biology.organism_classification Seedlings Seedling 010606 plant biology & botany |
| Zdroj: | FEMS Microbiology Ecology. 92:fiw113 |
| ISSN: | 1574-6941 |
| DOI: | 10.1093/femsec/fiw113 |
| Popis: | Root systems are simultaneously colonized by multiple individuals of mycorrhizal fungi. Intraspecific competitive interactions between fungal isolates are likely to affect both fungal and plant performance and be influenced by abiotic factors. Here, we assessed the impact of intraspecific competition between three Pisolithus microcarpus isolates on the establishment of, and benefit derived from, symbioses with Eucalyptus grandis seedlings. We investigated the outcomes of competition under ambient and elevated temperature and CO2 concentration ([CO2]) in a factorial design. We observed a reduction in mycelium growth, mycorrhiza formation and seedling mass when two P. microcarpus isolates were co-inoculated on a single E. grandis seedling. Isolates invested more in mycelium than in mycorrhizas in the presence of a competitor. All isolates responded negatively to elevated [CO2] and positively to elevated temperature, which led to no changes on the outcomes of the interactions with changing conditions. However, the presence of a competitor hindered the positive response of P. microcarpus isolates to warming, which resulted in larger negative effects of competition under elevated temperature than under ambient conditions. Our study highlights the need to consider how competition affects individual fungal responses as well as plant performance when trying to predict the impacts of climate change. |
| Databáze: | OpenAIRE |
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