1,722,165 research outputs found
Taxonomy and phylogeny of the genus Mycosphaerella and its anamorphs
No full textHistorically plant pathogenic species of Mycosphaerella have been regarded as host-specific, though this hypothesys has proven difficult to test largely due to the inavailability of fungal cultures. During the course of the past 20 years a concerted effort has been made to collect these fungi, and devise methods to cultivate them. Based on subsequent DNA sequence analyses the majority of these species were revealed to be host-specific, though some were not, suggesting that no general rule can be applied. Furthermore, analysis of recent molecular data revealed Mycosphaerella to be poly- and paraphyletic. Teleomorph morphology was shown to be too narrowly defined in some cases, and again too widely in others. Mycosphaerella and Teratosphaeria as presently circumscribed represent numerous different genera, many of which can be recognised based on the morphology of their 30 odd associated anamorph genera. Although Mycosphaerella is generally accepted to represent one of the largest genera of ascomycetous fungi, these data suggest that this is incorrect, and that Mycosphaerella should be restricted to taxa linked to Ramularia anamorphs. Furthermore, other anamorph form genera with Mycosphaerella-like teleomorphs appear to represent genera in their own right
Fig. 2 Maximum likelihood tree inferred from the combined cmdA, tef1 in New endemic Fusarium species hitch-hiking with pathogenic Fusarium strains causing Panama disease in small-holder banana plots in Indonesia
No full textFig. 2 Maximum likelihood tree inferred from the combined cmdA, tef1, tub, rpb1, and rpb2 sequence datasets of the Fusarium fujikuroi species complex (FFSC) including eight Indonesian isolates (indicated in blue). Bootstrap support values and Bayesian posterior probabilities are given at each node. The tree is rooted to Fusarium nirenbergiae (CBS 744.97) and F. oxysporum (CBS 716.74).Published as part of Maryani, N., Sandoval-Denis, M., Lombard, L., Crous, P.W. & Kema, G.H.J., 2019, New endemic Fusarium species hitch-hiking with pathogenic Fusarium strains causing Panama disease in small-holder banana plots in Indonesia, pp. 48-69 in Persoonia 43 on page 51, DOI: 10.3767/persoonia.2019.43.02, http://zenodo.org/record/356570
Colletotrichum species with curved conidia from herbaceous hosts
No full textColletotrichum (Glomerellaceae, Sordariomycetes) species with dark setae and curved conidia are known as anthracnose pathogens of a number of economically important hosts and are often identified as C. dematium. Colletotrichum dematium has been synonymised with many species, including the type of the genus, C. lineola. Since there is no living strain of the original material of either species available, we re-collected C. lineola from the original location to serve as an epitype of that name, and chose an appropriate epitype specimen and associated strain of C. dematium from the CBS collection. A multilocus molecular phylogenetic analysis (ITS, ACT, Tub2, CHS-1, GAPDH, HIS3) of 97 isolates of C. lineola, C. dematium and other Colletotrichum species with curved conidia from herbaceous hosts resulted in 20 clades, with 12 clades containing strains that had previously been identified as C. dematium. The epitype strains of C. lineola and C. dematium reside in two closely related clades. Other clades represent four previously undescribed species, C. anthrisci, C. liriopes, C. rusci and C. verruculosum, isolated respectively from Anthriscus in the Netherlands, Liriope in Mexico, Ruscus in Italy and Crotalaria in Zimbabwe. The new combinations C. spaethianum and C. tofieldiae are made. Colletotrichum truncatum is epitypified, as well as C. circinans, C. curcumae and C. fructi. Three further unidentified Colletotrichum taxa were detected in the phylogenetic analysis, which may require description after further research. Each species is comprehensively described and illustrate
Fig. 1 Maximum likelihood tree inferred using the rpb2 in New endemic Fusarium species hitch-hiking with pathogenic Fusarium strains causing Panama disease in small-holder banana plots in Indonesia
No full textFig. 1 Maximum likelihood tree inferred using the rpb2 gene region of the Indonesian isolates in the Fusarium fujikuroi species complex (FFSC), Fusarium incarnatum-equiseti species complex (FIESC), Fusarium sambucinum species complex (FSSC), and Fusarium oxysporum species complex (FOSC) isolates from a previous study (Maryani et al. 2019). Bootstrap support values and Bayesian posterior probabilities are given at each node. The tree is rooted to Fusarium acuminatum (NRRL 54210) and Fusarium heterosporum (NRRL 20692).Published as part of Maryani, N., Sandoval-Denis, M., Lombard, L., Crous, P.W. & Kema, G.H.J., 2019, New endemic Fusarium species hitch-hiking with pathogenic Fusarium strains causing Panama disease in small-holder banana plots in Indonesia, pp. 48-69 in Persoonia 43 on page 50, DOI: 10.3767/persoonia.2019.43.02, http://zenodo.org/record/356570
A new record for Australia - Mycosphaerella lateralis isolated from eucalypt hosts
Full text linkDissoconium is an anamorph genus associated with the teleomorph taxon Mycosphaerella. In Australia, Mycosphaerella species cause significant levels of disease in eucalypt plantations. A recent collection of diseased leaf material from eucalypt plantations in Queensland (Qld) revealed the existence of a Mycosphaerella species, with a Dissoconium anamorph, previously not recorded in Australia
Species of Mycosphaerella and related anamorphs occurring on Myrtaceae (excluding Eucalyptus)
No full textSix species of Mycosphaerella and eight anamorphs with unknown Mycosphaerella states occurring on myrtaceous hosts other than Eucalyptus are treated in the present study. Eight additional species that have recently been described elsewhere are discussed, while a further six species remain unconfirmed, and two are excluded from Mycosphaerella. New species are described in Mycosphaerella, Mycovellosiella, Passalora, Pseudocercaspora and Stenella, and new combinations proposed in Eruptio and Microthyrium. Keys are provided to distinguish the accepted species occurring on Myrtaceae other than Eucalyptus, while their morphological similarities with taxa known from this host are discussed.Articl
New and interesting records of South African fungi. XIII.Foliicolous microfungi
No full text[No abstract available]Articl
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Molecular phylogenetic studies for the description of Inocybe canicularis
No full textThis dataset was created as electronic supplement reporting on the molecular phylogenetic study accompanying the species description of Inocybe canicularis Bandini & U. Eberh. in Fungal Planet, description no. 1839, published in Crous, P.W. et al., 2025. Fungal Planet description sheets: 1781-1866. Persoonia 54, 327-587. DOI:10.3114/persoonia.2025.54.1
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