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9 results for “Tulasnella”
Data from: Strong phylogenetic congruence between Tulasnella fungi and their associated Drakaeinae orchids
<p>The study of congruency between phylogenies of interacting species can provide a powerful approach for understanding the evolutionary history of symbiotic associations. Orchid mycorrhizal fungi can survive independently of orchids making cospeciation unlikely, leading us to predict that any congruence would arise from host-switches to closely related fungal species. The Australasian orchid subtribe Drakaeinae is an iconic group of sexually-deceptive orchids that consists of approximately 66 species. In this study, we investigated the evolutionary relationships between representatives of all six Drakaeinae orchid genera (39 species) and their mycorrhizal fungi. We used an exome capture dataset to generate the first well-resolved phylogeny of the Drakaeinae genera. A total of 10 closely related <em>Tulasnella</em> Operational Taxonomic Units (OTUs) and previously described species were associated with the Drakaeinae orchids. Three of them were shared among orchid genera, with each genus associating with 1–7 <em>Tulasnella</em> lineages. Cophylogenetic analyses show Drakaeinae orchids and their <em>Tulasnella</em> associates exhibit significant congruence (P < 0.001) in the topology of their phylogenetic trees. <span>An event-based method also revealed significant congruence in Drakaeinae-<em>Tulasnella</em> relationships, with duplications (35), losses (25), and failure to diverge (9) the most frequent events, with minimal evidence for cospeciation (1) and host-switches (2). The high number of duplications suggests that the orchids speciate independently from the fungi, and the fungal species association of the ancestral orchid species is typically maintained in the daughter species. </span>For the Drakaeinae-<em>Tulasnella</em> interaction, a pattern of phylogenetic niche conservatism rather than coevolution likely led to the observed phylogenetic congruency in orchid and fungal phylogenies. Given that many orchid genera are characterized by sharing of fungal species between closely related orchid species, we predict that these findings may apply to a wide range of orchid lineages.</p>
Data from: Strong phylogenetic congruence between Tulasnella fungi and their associated Drakaeinae orchids
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FIGURE 2. The Bayesian 50 in Tulasnella tubericola (Tulasnellaceae, Cantharellales, Basidiomycota): a new Rhizoctonia-like fungus associated with mycorrhizal evergreen oak plants artificially inoculated with black truffle (Tuber melanosporum) in Spain
FIGURE 2. The Bayesian 50% majority-rule consensus tree inferred from sequences of the ITS region of rDNA. Numbers above and below nodes represent bayesian posterior probabilities. Phylogram was rooted with an ITS sequence of Botryobasidium botryosum.
FIGURE 1. Tulasnella tubericola CECT 20958 in Tulasnella tubericola (Tulasnellaceae, Cantharellales, Basidiomycota): a new Rhizoctonia-like fungus associated with mycorrhizal evergreen oak plants artificially inoculated with black truffle (Tuber melanosporum) in Spain
FIGURE 1. Tulasnella tubericola CECT 20958 (holotype). a-c. morphological aspect in PDA culture (front view) at several temperatures; d. runner hyphae; e. monilioid-like hyphal elements; f. chains of monilioid cells; g. bi- and tri-nucleate hyphae
FIGURE 1 in A new endophytic fungus, Tulasnella phuhinrongklaensis (Cantharellales, Basidiomycota) isolated from roots of the terrestrial orchid, Phalaenopsis pulcherrima
FIGURE 1. Phylogenetic tree derived from maximum likelihood analysis of combined ITS and LSU regions of rDNA genes of 44 sequences. Rhizoctonia obscura and R. solani were used as the outgroups. Numbers above branches are the bootstrap statistics percentages (left) and Bayesian posterior probabilities (right). Branches with bootstrap values ≥ 50% are shown at each branch and the bar represents 0.1 substitutions per nucleotide position. The fungal isolates from this study are in bold. T = type species.
FIGURE 2 in A new endophytic fungus, Tulasnella phuhinrongklaensis (Cantharellales, Basidiomycota) isolated from roots of the terrestrial orchid, Phalaenopsis pulcherrima
FIGURE 2. Tulasnella phuhinrongklaensis CMU-CR41 (holotype). Colony on different media after incubation at 25 °C for two weeks. A. Potato dextrose agar. B. Oat meal agar. C. Malt extract agar. D. Corn meal agar. E. Right-angled branching with septate hyphae (arrows). F. Mycelia stained with 5% DAPI showing binucleate cells (arrows). G. Branched chains of monilioid cells. Scale bars: A–D = 10 mm, E = 10 μm, F = 50 μm, G = 20 μm.
Gene expression changes in Tulasnella calospora- Serapias vomeracea mycorrhizal protocorms compared to Tulasnella calospora free-living mycelium
GEO Series GSE63869. Tulasnella calospora. 6 samples. Type: Expression profiling by high throughput sequencing.
Gene expression changes in Tulasnella calospora - Serapias vomeracea mycorrhizal protocorms at stage P2 compared to asymbiotic, achlorophyllous Serapias vomeracea protocorms
GEO Series GSE87120. Serapias vomeracea; Tulasnella calospora. 6 samples. Type: Expression profiling by high throughput sequencing.
Gene expression changes in Tulasnella calospora- Serapias vomeracea mycorrhizal protocorms at stage P2 compared to Tulasnella calospora free-living mycelium
GEO Series GSE86968. Serapias vomeracea; Tulasnella calospora. 9 samples. Type: Expression profiling by high throughput sequencing.
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