(2013) Ion Torrent PGM as Tool for Fungal Community Analysis: A Case Study ofĮndophytes in Eucalyptus grandis Reveals High Taxonomic Diversity. It also highlights some potential pitfalls in subsequent data analyses when using a technology with relatively short read lengths.Ĭitation: Kemler M, Garnas J, Wingfield MJ, Gryzenhout M, Pillay K-A, et al.
The study demonstrates that semiconductor sequencing is an ideal strategy for environmental sequencing of fungal communities. The community was dominated by Ascomycota, and particularly by families in the Dothidiomycetes that harbor well-known plant pathogens. Database filtering had a small, but statistically significant, effect on the assignment of sequences to reference sequences. 48 families between least and most stringent filters). Sequence similarity cutoff values only had a marginal effect on the identified family numbers, whereas different sequence quality filters had a large effect (89 vs. We determined the impact of various analysis parameters on the interpretation of the results, namely different sequence quality parameter settings, different sequence similarity cutoffs for clustering and filtering of databases for removal of sequences with incomplete taxonomy. In this study we sequenced the internal transcribed spacer 1 (ITS1) nuclear encoded ribosomal RNA of the endophytic community of the economically important tree, Eucalyptus grandis, from South Africa using the Ion Torrent Personal Genome Machine (PGM). One of the promising new technologies, namely semiconductor sequencing, has thus far not been used in fungal diversity assessments. The developments in next generation sequencing technologies are, however, starting to reveal the true extent of fungal diversity. This is especially true for endophytic communities of fungi living in healthy plant tissue. The Kingdom Fungi adds substantially to the diversity of life, but due to their cryptic morphology and lifestyle, tremendous diversity, paucity of formally described specimens, and the difficulty in isolating environmental strains into culture, fungal communities are difficult to characterize. Wingfield1, Marieka Gryzenhout3, Kerry-Anne Pillay1, Bernard Slippers1ġ Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, South Africa, 2 Department of Zoology and Entomology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, South Africa, 3 Department of Plant Sciences, University of the Free State, Bloemfontein, South Africa Martin Kemler1*, Jeff Garnas2, Michael J. Ion Torrent PGM as Tool for Fungal Community Analysis: A Case Study of Endophytes in Eucalyptus grandis Reveals High Taxonomic Diversity
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