Abstract
The diversity of the Fungi has been estimated to be as much as 5.1 million species, however only a small fraction of this number are currently described. Traditional methods based around culturing and microscopic analyses of specimens enable taxonomic classification and can lead to detailed phenotypic and genotypic analysis. However, these methods select for those species easily cultured in laboratory conditions or with distinctive morphologies such as multi-cellular reproductive structures. As such the uncultured majority is overlooked. Clone library construction is widely used to identify uncultured species within an environment but few environmental gene libraries are sampled to saturation and the process can often be biased towards certain groups. However, using such methods a large number of novel sequences branching with the fungi in phylogenetic analyses have been retrieved from a variety of environments including freshwater sites, marine environments, soils, and insects. In this chapter we review some of this recently discovered novel diversity and the techniques used to obtain them. We will also discuss recent advances in second generation sequencing technology and fluorescence in situ hybridisation microscopy, and what the application of such techniques could mean for our understanding of the diversity of fungi in natural environments and the fungal tree of life.
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Jones, M.D.M., Richards, T.A. (2011). 3 Environmental DNA Analysis and the Expansion of the Fungal Tree of Life. In: Pöggeler, S., Wöstemeyer, J. (eds) Evolution of Fungi and Fungal-Like Organisms. The Mycota, vol 14. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-19974-5_3
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