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Veselská, Tereza; Skelton, James; Kostovčík, Martin; Hulcr, Jiří; Baldrian, Petr; Chudíčková, Milada; Cajthaml, Tomáš; Vojtová, Tereza; Garcia-Fraile, Paula; Kolařík, Miroslav
Fungal ecology, October 2019, 2019-10-00, Letnik: 41Journal Article
A phenotype is the expression of interactions between species genotype and environment. We quantified the contributions of ecological and phylogenetic associations to phenotypic variation in Geosmithia fungi. Geosmithia are symbiotic beetle-associated saprotrophs with a range of life histories and host specificities, including obligate nutritional beetle mutualists (ambrosia fungi) and phytopathogens. We hypothesized that: (1) species phenotypes are better explained by their ecology than by their phylogenetic relationships; (2) niche specialization was accompanied by enzymatic capability losses; and (3) ambrosia Geosmithia species have higher nutritional quality and antibiotic capabilities than species with facultative symbioses. Our results confirmed that long-term co-evolved specialists have reduced metabolic breadth in comparison to generalists. Phytopathogenic G. morbida produces unique enzyme suites with affinity to ligno-cellulose. Mycelia of ambrosia fungi contain large amounts of oleic fatty acid with nutritive and possibly allelopathic function. Overall, our results indicate that Geosmithia ecology have greater effect on species phenotype than their phylogenetic relationships. •Enzymatic profiles, biochemical composition and antibiosis in Geosmithia analysed.•Adaptive traits related to the various ecological strategies tracked.•Potential virulence factors of Geosmithia morbida identified.•Specialists exhibit unique enzyme suites and reduced metabolic breadth.•Obligatory symbiotic ambrosia exhibits specific profiles of fatty acids.
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