@ARTICLE{TreeBASE2Ref29784, author = {Janusz Blaszkowski and Franco Magurno}, title = {Rhizoglomus dalpeae, R. maiae, and R. silesianum, new species}, year = {2019}, keywords = {Arbuscular mycorrhizal fungi, Glomeromycota, Morphology, Molecular phylogeny, RPB1, 18S-ITS-28S nuc rDNA}, doi = {}, url = {http://}, pmid = {}, journal = {Mycologia}, volume = {}, number = {}, pages = {}, abstract = {We found three arbuscular mycorrhizal fungi (AMF; phylum Glomeromycota) producing glomoid spores. The mode of formation and morphology of these spores suggested that they represent undescribed species in the genus Rhizoglomus of the family Glomeraceae. Subsequent morphological studies of the spores and molecular phylogenetic analyses of sequences of the nuc rDNA small subunit (18S), internal transcribed spacer (ITS1-5.8S-ITS2 = ITS), and large subunit (28S) region (= 18S-ITS-28S) confirmed the suggestion and indicated that the fungi strongly differ from all previously described Rhizoglomus species with known DNA barcodes. Consequently, the fungi were described here as new species: R. dalpeae, R. maiae, and R. silesianum. Two of these species lived hypogeously in the field in habitats subjected to strong environmental stresses. Rhizoglomus dalpeae originated from an inselberg located within Sudanian savanna zone in Benin, West Africa, where the temperature of the inselberg rock during a five-month drought ranges from 40‒60 C. Rhizoglomus silesianum originated from a coal mine spoil heap in Poland, whose substrate is extremely poor in nutrients, has unfavourable texture, and may heat up to 50 C. By contrast, R. maiae was found in more favourable habitat conditions. It produced an epigeous cluster of spores among shrubs growing in a tropical humid reserve in Brazil. Moreover, the compatibility of phylogenies of species of the family Glomeraceae reconstructed from analyses of sequences of 18S-ITS-28S and the largest subunit of RNA polymerase II (RPB1) was discussed. } }

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