March 2019
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20 Reads
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March 2019
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20 Reads
March 2019
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1 Read
March 2019
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489 Reads
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17 Citations
Species of rust fungi of the genus Milesina (Pucciniastraceae, Pucciniales) are distributed mainly in northern temperate regions. They host-alternate between needles of fir ( Abies spp.) and fronds of ferns (species of Polypodiales). Milesina species are distinguished based on host taxonomy and urediniospore morphology. In this study, 12 species of Milesina from Europe were revised. Specimens were examined by light and scanning electron microscopy for urediniospore morphology with a focus on visualising germ pores (number, size and position) and echinulation. In addition, barcode loci (ITS, nad6, 28S) were used for species delimitation and for molecular phylogenetic analyses. Barcodes of 72 Milesina specimens were provided, including 11 of the 12 species. Whereas urediniospore morphology features were sufficient to distinguish all 12 Milesina species except for 2 ( M.blechni and M.kriegeriana ), ITS sequences separated only 4 of 11 species. Sequencing with 28S and nad6 did not improve species resolution. Phylogenetic analysis, however, revealed four phylogenetic groups within Milesina that also correlate with specific urediniospore characters (germ pore number and position and echinulation). These groups are proposed as new sections within Milesina (sections Milesina , Vogesiacae M. Scholler & Bubner, sect. nov. , Scolopendriorum M. Scholler & Bubner, sect. nov. and Carpaticae M. Scholler & Bubner, sect. nov. ). In addition, Milesinawoodwardiana Buchheit & M. Scholler, sp. nov. on Woodwardiaradicans , a member of the type section Milesina, is newly described. An identification key for European Milesina species, based on urediniospore features, is provided.
March 2019
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5 Reads
March 2019
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5 Reads
March 2019
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9 Reads
March 2019
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7 Reads
March 2019
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7 Reads
March 2019
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15 Reads
March 2019
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20 Reads
... Phylogenetic analysis LSU and ITS sequences were used to reconstruct the phylogenetic position of the IHLR taxon observed across the southeastern United States, notably resolving its position within the genus Melampsoridium. Sequences obtained in this study and voucher sequences from previously published work (Liang et al., 2006;McKenzie et al., 2013;Bubner et al., 2019) were aligned using the MUSCLE (Edgar, 2004) plugin for GENEIOUS 10. Sequences were visually edited to treat ambiguities and sequencing errors. ...
March 2019
... Anzahl und Verteilung der Keimporen der Urediniosporen bei Rostpilzen auf Gräsern sind bereits von CUMMINS (1956) als wichtiges Bestimmungs-und Artmerkmal bei Grasrosten erkannt worden. In diesem Beitrag testen wir mit dem Ziel der schnellen Artbestimmung Keimporenmerkmale mit Hilfe eines einfachen lichtmikroskopischen Phasenkontrastverfahrens, das bereits bei anderen Rostpilzgruppen (SCHOLLER et al., 2014, BUBNER et al., 2019 ...
May 2014