Atractiellomycetes belonging to the rust lineage (Pucciniomycotina) form mycorrhizae with terrestrial and epiphytic neotropical orchids
| Autor: | Sigisfredo Garnica, Ingrid Kottke, Darío Cruz, Ingeborg Haug, Juan Pablo Suárez, Robert Bauer, Paulo Herrera |
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| Rok vydání: | 2010 |
| Předmět: |
orchid mycorrhiza
General Biochemistry Genetics and Molecular Biology Agaricomycetes Orchid mycorrhiza atractiellales Research articles helicogloea Agaricomycotina Atractiellomycetes Mycorrhizae Botany Pucciniomycotina DNA Ribosomal Spacer DNA Fungal Orchidaceae Phylogeny General Environmental Science General Immunology and Microbiology biology Ecology fungi Basidiomycota General Medicine biology.organism_classification simple neotropical mountain rainforest pucciniomycotina Epiphyte Ecuador General Agricultural and Biological Sciences septate basidiomycota |
| Zdroj: | Repositorio Universidad Técnica Particular de Loja Universidad Técnica Particular de Loja instacron:UTPL |
| Popis: | Distinctive groups of fungi are involved in the diverse mycorrhizal associations of land plants. All previously known mycorrhiza-forming Basidiomycota associated with trees, ericads, liverworts or orchids are hosted in Agaricomycetes, Agaricomycotina. Here we demonstrate for the first time that Atractiellomycetes, members of the rust lineage (Pucciniomycotina), are mycobionts of orchids. The mycobionts of 103 terrestrial and epiphytic orchid individuals, sampled in the tropical mountain rainforest of Southern Ecuador, were identified by sequencing the whole ITS1-5.8S-ITS2 region and part of 28S rDNA. Mycorrhizae of 13 orchid individuals were investigated by transmission electron microscopy. Simple septal pores and symplechosomes in the hyphal coils of mycorrhizae from four orchid individuals indicated members of Atractiellomycetes. Molecular phytogeny of sequences from mycobionts of 32 orchid individuals out of 103 samples confirmed Atractiellomycetes and the placement in Pucciniomycotina, previously known to comprise only parasitic and saprophytic fungi. Thus, our finding reveals these fungi, frequently associated to neotropical orchids, as the most basal living basidiomycetes involved in mycorrhizal associations of land plants. © 2009 The Royal Society. |
| Databáze: | OpenAIRE |
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