Topic
Endothia
About: Endothia is a research topic. Over the lifetime, 48 publications have been published within this topic receiving 1125 citations.
Papers
1 Jan 2002
TL;DR: The ascomycete order Diaporthales includes a number of plant pathogenic fungi such as Cryphonectria parasitica, the chestnut blight fungus, as well as many asexually reproducing fungi without known sexual states.
Abstract: The ascomycete order Diaporthales in- cludes a number of plant pathogenic fungi such as Cryphonectria parasitica, the chestnut blight fungus, as well as many asexually reproducing fungi without known sexual states. Relationships among genera in the Diaporthales were evaluated as a basis for the rec- ognition of families and to provide a taxonomic framework for the asexually reproducing diaporthal- ean fungi. Phylogenetic relationships were deter- mined based on analyses of large subunit (LSU) nu- clear ribosomal DNA (nrDNA) sequences. Within the Diaporthales 82 sequences representing 69 taxa were analyzed. Results suggest the presence of at least six major lineages within the Diaporthales recognized as the Gnomoniaceae sensu stricto, Melanconidaceae sensu stricto, Schizoparme complex including the an- amorph genera Coniella and Pilidiella, Cryphonectria- Endothia complex, Valsaceae sensu stricto, and Dia- porthaceae sensu stricto. In addition, six teleomorph- ic and anamorphic taxa fell within the Diaporthales but were not allied with any of the six lineages.
174 citations
TL;DR: Double-stranded RNA (dsRNA) was detected in hypovirulent but not in virulent strains of Cryphonectria (Endothia) parasitica isolated in Switzerland, indicating phenol oxidase activity, whereas hypovirsulent strains showed weak or no activity.
Abstract: Double-stranded RNA (dsRNA) was detected in hypovirulent but not in virulent strains of Cryphonectria (Endothia) parasitica isolated in Switzerland. To test for phenol oxidase activity we grew the strains on malt extract agar containing tannic acid (Bavendamm test). All virulent strains produced a strong color reaction, indicating phenol oxidase activity, whereas hypovirulent strains showed weak or no activity. (...)
144 citations
TL;DR: The new family Cryphonectriaceae (Diaporthales) is defined to accommodate genera in the Cryph onectria-Endothia complex and can be distinguished from those in other families or undescribed groups of the Diaporthale by the formation of orange stromatic tissue at some stage of their life cycle.
Abstract: Recent phylogenetic studies on the members of the Diaporthales have shown that the order includes a number of distinct phylogenetic groups. These groups represent the Gnomoniaceae, Melanconidaceae, Valsaceae, Diaporthaceae and Togniniaceae. New groups representing undescribed families also have emerged and they have been referred to as the Schizoparme, Cryphonectria-Endothia and Harknessia complexes. In this study we define the new family Cryphonectriaceae (Diaporthales) to accommodate genera in the Cryphonectria-Endothia complex. These genera can be distinguished from those in other families or undescribed groups of the Diaporthales by the formation of orange stromatic tissue at some stage of their life cycle and a purple reaction in KOH and a yellow reaction in lactic acid associated with pigments in the stromatic tissue or in culture.
67 citations
TL;DR: Results show that hypovirulence is associated with concurrent changes in a few highly expressed poly(A)+ RNAs, which suggests a specific effect of the double-stranded RNA on fungal gene expression.
Abstract: The double-stranded RNA responsible for transmissible hypovirulence in Cryphonectria (Endothia) parasitica was found to affect the accumulation of specific poly(A)+ RNA. Using differential hybridization techniques, two genes were isolated, Vir1 and Vir2, which were specifically expressed as poly(A)+ RNAs in the virulent cells. The highly expressed RNA sequences from these genes were not found in total RNA isolated from either American or European hypovirulent strains, although the genes were present in their genomes. Other virulence- and hypovirulence-specific RNA sequences were also detected. One isolated hypovirulence-specific RNA sequence was expressed in both virulent and hypovirulent cells, but in a two- to fourfold-higher concentration in the hypovirulent cells. The results show that hypovirulence is associated with concurrent changes in a few highly expressed poly(A)+ RNAs, which suggests a specific effect of the double-stranded RNA on fungal gene expression.
65 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2020 | 1 |
| 2018 | 1 |
| 2011 | 1 |
| 2006 | 3 |
| 2005 | 2 |
| 2004 | 2 |