Studies in Mycology (2013) 75, 37-114

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P.W. Crous, U. Braun, G.C. Hunter, M.J. Wingfield, G.J.M. Verkley, H.-D. Shin, C. Nakashima and J.Z. Groenewald (2013)
Phylogenetic lineages in Pseudocercospora
Studies in Mycology 75, 37-114
Abstract: Pseudocercospora is a large cosmopolitan genus of plant pathogenic fungi that are commonly associated with leaf and fruit spots as well as blights on a wide range of plant hosts. They occur in arid as well as wet environments and in a wide range of climates including cool temperate, sub-tropical and tropical regions. Pseudocercospora is now treated as a genus in its own right, although formerly recognised as either an anamorphic state of Mycosphaerella or having mycosphaerella-like teleomorphs. The aim of this study was to sequence the partial 28S nuclear ribosomal RNA gene of a selected set of isolates to resolve phylogenetic generic limits within the Pseudocercospora complex. From these data, 14 clades are recognised, six of which cluster in Mycosphaerellaceae. Pseudocercospora s. str. represents a distinct clade, sister to Passalora eucalypti, and a clade representing the genera Scolecostigmina, Trochophora and Pallidocercospora gen. nov., taxa formerly accommodated in the Mycosphaerella heimii complex and characterised by smooth, pale brown conidia, as well as the formation of red crystals in agar media. Other clades in Mycosphaerellaceae include Sonderhenia, Microcyclosporella, and Paracercospora. Pseudocercosporella resides in a large clade along with Phloeospora, Miuraea, Cercospora and Septoria. Additional clades represent Dissoconiaceae, Teratosphaeriaceae, Cladosporiaceae, and the genera Xenostigmina, Strelitziana, Cyphellophora and Thedgonia. The genus Phaeomycocentrospora is introduced to accommodate Mycocentrospora cantuariensis, primarily distinguished from Pseudocercospora based on its hyaline hyphae, broad conidiogenous loci and hila. Host specificity was considered for 146 species of Pseudocercospora occurring on 115 host genera from 33 countries. Partial nucleotide sequence data for three gene loci, ITS, EF-1α, and ACT suggest that the majority of these species are host specific. Species identified on the basis of host, symptomatology and general morphology, within the same geographic region, frequently differed phylogenetically, indicating that the application of European and American names to Asian taxa, and vice versa, was often not warranted.
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Database assignments for author(s): Pedro W. Crous, Uwe Braun, Johannes Z. Groenewald, Michael J. Wingfield, Gavin C. Hunter

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Beneficial Pest/Disease/Weed Crop/Product Country Quarant.
Pseudocercospora fijiensis Banana/plantain (Musa) Cameroon
Cercospora sojina Soybean (Glycine max) Korea-South
Pseudocercospora griseola Beans (Phaseolus) Tanzania
Pseudocercospora cladosporioides Olive (Olea europaea) Tunisia
Pseudocercospora musae Banana/plantain (Musa) Cuba
Pseudocercospora purpurea Avocado (Persea americana) Mexico
Pseudocercospora angolensis Citrus (genus) Cameroon
Pseudocercospora angolensis Citrus (genus) Ethiopia
Pseudocercospora angolensis Citrus (genus) Kenya
Pseudocercospora angolensis Citrus (genus) Uganda
Pseudocercospora angolensis Citrus (genus) Angola
Pseudocercospora angolensis Citrus (genus) Zambia
Pseudocercospora angolensis Citrus (genus) Zimbabwe
Pseudocercospora abelmoschi Hibiscus (crop) Korea-South
Pseudocercospora cruenta Cowpea and relatives (Vigna) Trinidad and Tobago
Pallidocercospora heimioides Eucalypt (Eucalyptus) Indonesia
Pallidocercospora irregulariramosa Eucalypt (Eucalyptus) South Africa
Parapallidocercospora colombiensis Eucalypt (Eucalyptus) Colombia
Parapallidocercospora thailandica Acacia (crop) Thailand
Pallidocercospora acaciigena Acacia (crop) Venezuela
Pseudocercospora vitis Grapevine (Vitis) Korea-South
Pseudocercospora eustomatis Argentina
Pseudocercospora fuligena Tomato (Solanum lycopersicum) Thailand
Pseudocercospora nogalesii New Zealand
Pseudocercospora lythracearum Lagerstroemia (crop) Korea-South
Pseudocercospora eucalyptorum Eucalypt (Eucalyptus) Spain (continental)
Pseudocercospora eucalyptorum Eucalypt (Eucalyptus) South Africa
Phaeomycocentrospora cantuariensis Hop (Humulus lupulus) Korea-South
Pseudocercospora ocimicola India
Pseudocercospora ocimicola Venezuela
Pseudocercospora ocimicola Basil (Ocimum) Cuba
Pseudocercospora ocimicola Basil (Ocimum) Dominican Republic
Pseudocercospora ocimicola Basil (Ocimum) Brazil (NE)
Pseudocercospora norchiensis Raspberry/blackberry (Rubus) New Zealand
Pseudocercospora tereticornis Eucalypt (Eucalyptus)
Pseudocercospora subsessilis Cuba
Pseudocercospora guianensis (weed pathogen) Japan