Abstract
A new genus and species, Blastosporiumpersicolor, is described and illustrated from leaves of mildewed tobacco. It is characterised by branched, septate hyphae from which arise macronematous, unbranched or spaced branched conidiophores and mono- or polyblastic conidiogenous cells that produced solitary and blastocatenate, obovoid, oblong, ellipsoidal, allantoid, broad fusiform to irregular, unicellular, hyaline conidia. The phylogenetic analyses, based on the combined sequence data from the small and large nuclear subunit ribosomal DNA (SSU and LSU), placed B.persicolor in the Leotiomycetes class, Helotiales order.
Highlights
The Kingdom Fungi contains a huge number of species, which continues to rise with more collections
Leotiomycetes is a large class in Ascomycota and has potential taxonomic value relating to the ecology and biology
Members of the Helotiales thrive in various ecosystems and cover a broad range of niches and helotialean fungi have been found as plant pathogens, endophytes, nematode-trapping fungi, mycorrhizae, ectomycorrhizal parasites, fungal parasites, terrestrial saprobes, aquatic saprobes, root symbionts and wood rot fungi (Wang et al 2006)
Summary
The Kingdom Fungi contains a huge number of species, which continues to rise with more collections. With the advance in the studies of DNA sequence data, the fungal classification system has been updated over the years. The traditional classification of Leotiomycetes at high levels has experienced considerable challenges with the inclusion of the molecular techniques in systematics studies. Early research accepted five orders, 21 families and about 510 genera in the Leotiomycetes on the basis of both traditional classification and molecular phylogenetic studies (Eriksson 2005, Kirk et al 2001), but a recent study reported a new classification of Leotiomycetes, including 11 orders, 44 families and about 590 genera (Wijayawardene et al 2018) and this classification lacks sufficient DNA sequence data. In Leotiomycetes, the order Helotiales, one of the largest non-lichen-forming ascomycetous groups, is composed of fungi of diverse morphology and ecology. Members of the Helotiales thrive in various ecosystems and cover a broad range of niches and helotialean fungi have been found as plant pathogens, endophytes, nematode-trapping fungi, mycorrhizae, ectomycorrhizal parasites, fungal parasites, terrestrial saprobes, aquatic saprobes, root symbionts and wood rot fungi (Wang et al 2006)
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