A Preliminary Overview of the Diaporthales Based on Large Subunit Nuclear Ribosomal DNA Sequences

Castlebury, Lisa A.; Rossman, Amy Y.; Jaklitsch, Walter M.; Vasilyeva, Larissa N.

doi:10.2307/3761867

Cited by 80 publications

(64 citation statements)

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“…In contrast, in the Valsaceae and Sydowiellaceae, stromatic and nonstromatic tissues are present (Wehmeyer 1975;Rossman et al 2007). Also, in other families of Diaporthales such as Cryphonectriaceae, Diaporthaceae, Melanconidaceae and Pseudovalsaceae, the stromatic tissues are often welldeveloped (Castlebury et al 2002;Gryzenhout et al 2006;Voglmayr and Jaklitsch 2008). The coelomycetous anamorph of Pseudoplagiostoma (previously reported as C. eucalypti) also has acervular to pycnidial conidiomata without a well-developed stroma, phialidic and annellidic conidiogenous cells, and aseptate conidia, which are features typical of the Diaporthales (Rossman et al 2007).…”

Section: Discussionmentioning

confidence: 99%

“…Within the Diaporthales, Pseudoplagiostoma is more similar to members of the Gnomoniaceae based on the morphological characters of its teleomorph, such as solitary, thin-walled, immersed ascomata with lateral beaks lacking stromata, asci with a distinct ring, and medianly 1-septate ascospores less than 25 mm long (Monod 1983;Barr 1978;Samuels and Blackwell 2001;Castlebury et al 2002;Sogonov et al 2008). In contrast, in the Valsaceae and Sydowiellaceae, stromatic and nonstromatic tissues are present (Wehmeyer 1975;Rossman et al 2007).…”

Section: Discussionmentioning

confidence: 99%

“…(EF672242; 92 % identical), Coleophoma empetri (FJ480134; 92 % identical) and others. (Wehmeyer 1975;Castlebury et al 2002;Gryzenhout et al 2006;Rossman et al 2007;Voglmayr and Jaklitsch 2008), the Pseudoplagiostomaceae most closely resembles the Gnomoniaceae in the morphological characters of its teleomorph, such as solitary, thin-walled, immersed ascomata with lateral beaks lacking stromata, asci with a distinct ring, and medianly 1-septate ascospores less than 25 mm long (Monod 1983;Castlebury et al 2002;Sogonov et al 2008). Phylogenetically, Pseudoplagiostro- MycoBank MB516496.…”

Section: Morphologymentioning

confidence: 99%

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Re-evaluation of Cryptosporiopsis eucalypti and Cryptosporiopsis-like species occurring on Eucalyptus leaves

et al. 2010

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Cryptosporiopsis eucalypti is a common follicolous pathogen of Eucalyptus species in tropical and temperate regions where these trees are grown in plantations. The taxonomy of C. eucalypti is confused by the fact that it is phylogenetically unrelated to the type species of Cryptosporiopsis (Cryptosporiopsis nigra = C. scutellata, Helotiales). The aim of this study was to resolve the taxonomic position of C. eucalypti based on morphology and phylogenetic inference. Thirty-two Eucalyptus leaf samples with symptoms typical of C. eucalypti infection were collected from 10 tropical and temperate countries across four continents. Cultures were established from single conidia, as well as from ascospores of a previously unreported teleomorph state. DNA sequences were obtained for the 28 S nrDNA, the internal transcribed spacers of the nrDNA operon, and beta-tubulin regions to determine generic and species-level relationships. DNAsequence analysis showed that conidial and ascospore isolates of C. eucalypti have low intraspecific variation, although two collections from Australia and one from Uruguay represented two novel taxa. Based on the newly collected teleomorph stage, as well as the phylogenetic data, C. eucalypti is shown to represent a new genus closely related to Plagiostoma (Gnomoniaceae, Diaporthales) for which the names Pseudoplagiostoma gen. nov. and Pseudoplagiostomaceae fam. nov. (Diaporthales) are introduced. Two new species of Cryptosporiopsis (Dermateaceae, Helotiales) on Eucalyptus from Australia and California (USA) are also described.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Morphologymentioning

confidence: 99%

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Re-evaluation of Cryptosporiopsis eucalypti and Cryptosporiopsis-like species occurring on Eucalyptus leaves

et al. 2010

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“…MAXTREES was set to auto-increase in all analyses. Sequences of two isolates of Diaporthe ambigua (Gryzenhout et al 2009), which belong to the Diaporthaceae, another family in the Diaporthales (Castlebury et al 2002;Rossman et al 2007), were used as outgroups in all analyses, following examples of previously published data sets (Gryzenhout et al 2009). The outgroup was monophyletic in the phylogenetic analyses.…”

Section: Dna Sequence Comparisonsmentioning

confidence: 99%

“…showed typical microscopic characteristics of members of the Cryphonectriaceae (Table 2). These fruiting structures were characterized by distinct orange stromatic tissue, Diaporthe-type centra ) and a pigment that turns purple and yellow in culture and host tissue when treated with 3% KOH and lactic acid respectively (Castlebury et al 2002;Rossman et al 2007;Gryzenhout et al 2009). The teleomorph fruiting structures were abundant on the bark, while conidiomatal structures were only occasionally seen on the bark specimens.…”

Section: Morphologymentioning

confidence: 99%

Aurifilum, a new fungal genus in the Cryphonectriaceae from Terminalia species in Cameroon

Begoude

Gryzenhout

Wingfield

et al. 2010

Antonie van Leeuwenhoek

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Native Terminalia spp. in West Africa provide a popular source of construction timber as well as medical, spiritual and social benefits to rural populations. Very little is, however, known regarding the diseases that affect these trees. During an investigation into possible diseases of Terminalia spp. in Cameroon, orange to yellow fungal fruiting structures, resembling those of fungi in the Cryphonectriaceae, were commonly observed on the bark of native Terminalia ivorensis, and on dead branches of non-native Terminalia mantaly. In this study the fungus was identified based on morphological features as well as DNA sequence data (ITS and β-tubulin) and its pathogenicity was tested on T. mantaly seedlings. Our results showed that isolates of this fungus represent a previously undescribed genus in the Cryphonectriaceae, which we describe as Aurifilum marmelostoma gen. et sp. nov. Pathogenicity tests revealed that A. marmelostoma is pathogenic on T. mantaly. These tests, and the association of A. marmelostoma with disease symptoms on T. ivorensis, suggest that the fungus is a pathogen of this important tree.

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Magnaporthe and Its Relatives

Besi¹,

Tucker²,

Sesma³

2009

Encyclopedia of Life Sciences

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The ascomycetous family Magnaporthaceae includes plant pathogenic fungi that cause diseases on members of the Poaceae worldwide, affecting the turfgrass industry and staple food crops such as rice, wheat, millet and maize. The economically significant turfgrass root pathogen Magnaporthe poae belongs to this family. Two of the most damaging fungal pathogens of wheat and rice also belong to this family: the intractable root‐infecting fungus and causal agent of take‐all disease, Gaeumannomyces graminis and the blast fungus Magnaporthe grisea . M. grisea has emerged as a paradigm for the understanding of fungal aerial attack. Interestingly, M. grisea can also infect roots and is far more amenable to transformation than G. graminis and M. poae . Consequently, M. grisea constitutes an excellent fungal model system for the dissection of genetic determinants required for infection on underground tissues, and for comparative analysis of the distinct tissue‐specific pathogenic mechanisms observed during leaf and root colonization. Key concepts Appressorium: Infection structure formed by fungal hypha that mediates attachment and penetration in aerial plant tissues. This term is also used for penetration structures produced by symbiotic fungi on roots. Clade: Phylogenetic group which comprises a single common ancestor and all the descendants of that ancestor. EST (expressed sequenced tags): Short cDNA (complementary deoxyribonucleic acid) sequences, generally obtained from cDNA libraries generated under different nutrient conditions and/or tissues. Hyphopodium: Specialized structure produced at the tip of the hyphae that mediate fungal penetration into root tissue. G. graminis can produce simple or lobed hyphopodia. QTL (quantitative trait locus): Region of DNA associated with a certain quantitative phenotypic trait. The molecular identification of QTLs usually enables the identification and sequencing of genes that are responsible for such a phenotypic trait.

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A Preliminary Overview of the Diaporthales Based on Large Subunit Nuclear Ribosomal DNA Sequences

Cited by 80 publications

References 0 publications

Re-evaluation of Cryptosporiopsis eucalypti and Cryptosporiopsis-like species occurring on Eucalyptus leaves

Re-evaluation of Cryptosporiopsis eucalypti and Cryptosporiopsis-like species occurring on Eucalyptus leaves

Aurifilum, a new fungal genus in the Cryphonectriaceae from Terminalia species in Cameroon

Magnaporthe and Its Relatives

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