During surveys of extremophilic fungi in hypersaline,alkaline lakes of Wadi-El-Natron,Egypt,an interesting fungus was recovered from a mud sample collected from Lake Hamra in Wadi-El-Natron,Egypt.Maximum likelihood an...During surveys of extremophilic fungi in hypersaline,alkaline lakes of Wadi-El-Natron,Egypt,an interesting fungus was recovered from a mud sample collected from Lake Hamra in Wadi-El-Natron,Egypt.Maximum likelihood analysis of Internal Transcribed Spacer(ITS)gene along with morphological comparisons of related taxa revealed a novel taxon,Paracremonium moubasheri which is described and illustrated in the current study.Paracremonium moubasheri can be distinguished from the known species of the genus by its large conidia,in addition to the presence of chlamydospores.展开更多
The present study isolated and identified 32 species of endophytic mycobiota belonging to 18 genera associated with 8 wild medicinal plants collected from El-Kharga Oasis,New Valley Governorate,Egypt.Fusarium was the ...The present study isolated and identified 32 species of endophytic mycobiota belonging to 18 genera associated with 8 wild medicinal plants collected from El-Kharga Oasis,New Valley Governorate,Egypt.Fusarium was the most common genus followed by Alternaria and Aspergillus.Convolvulus arvensis was the plant with the highest number of endophytes over the other plant species,while Moringa oleifera reported the lowest number of endophytes.In addition,the entomopathogenic fungus Beauveria bassiana;was recorded for the first time from leaves of Portulaca oleracea.One hundred and twenty-three isolates representing 32 species were screened for their abilities to produce pectinase,carboxy methyl cellulase(CMCase)and avicellase enzymes on sucrose free-Cz supplemented,individually with 1%pectin or 1%CMC or 1%avicel as a sole carbon source,respectively.Ninety-four isolates produced pectinase while 66 isolates produced cellulases.The quantitative assays of the three enzymes for high-producers were performed in submerged fermentation using sucrose-free Cz broth.Aspergillus was the superior in the production of the three enzymes with the potent strains were A.terreus AUMC 14287 for CMCase(22.0 IU/ml/min)and avicellase(47.868 IU/ml/min)and A.terreus AUMC 14278 for pectinase(225.43 IU/ml/min).展开更多
In the present study,a novel fungus belonging to the genus Aspergillus section Circumdati was isolated from a cultivated soil sample close to El-Gaar lake in Wadi-El-Natron region,Egypt.Sequence of the internal transc...In the present study,a novel fungus belonging to the genus Aspergillus section Circumdati was isolated from a cultivated soil sample close to El-Gaar lake in Wadi-El-Natron region,Egypt.Sequence of the internal transcribed spacer(ITS)gene of its DNA showed that the isolate differs from all known Aspergillus species in section Circumdati.The novel Aspergillus species is described here as Aspergillus gaarensis.Phenotypic characteristics and molecular data were applied to determine its novel taxonomic status.Both macro and micro characteristics of the novel species are presented in the current study.展开更多
文摘During surveys of extremophilic fungi in hypersaline,alkaline lakes of Wadi-El-Natron,Egypt,an interesting fungus was recovered from a mud sample collected from Lake Hamra in Wadi-El-Natron,Egypt.Maximum likelihood analysis of Internal Transcribed Spacer(ITS)gene along with morphological comparisons of related taxa revealed a novel taxon,Paracremonium moubasheri which is described and illustrated in the current study.Paracremonium moubasheri can be distinguished from the known species of the genus by its large conidia,in addition to the presence of chlamydospores.
文摘The present study isolated and identified 32 species of endophytic mycobiota belonging to 18 genera associated with 8 wild medicinal plants collected from El-Kharga Oasis,New Valley Governorate,Egypt.Fusarium was the most common genus followed by Alternaria and Aspergillus.Convolvulus arvensis was the plant with the highest number of endophytes over the other plant species,while Moringa oleifera reported the lowest number of endophytes.In addition,the entomopathogenic fungus Beauveria bassiana;was recorded for the first time from leaves of Portulaca oleracea.One hundred and twenty-three isolates representing 32 species were screened for their abilities to produce pectinase,carboxy methyl cellulase(CMCase)and avicellase enzymes on sucrose free-Cz supplemented,individually with 1%pectin or 1%CMC or 1%avicel as a sole carbon source,respectively.Ninety-four isolates produced pectinase while 66 isolates produced cellulases.The quantitative assays of the three enzymes for high-producers were performed in submerged fermentation using sucrose-free Cz broth.Aspergillus was the superior in the production of the three enzymes with the potent strains were A.terreus AUMC 14287 for CMCase(22.0 IU/ml/min)and avicellase(47.868 IU/ml/min)and A.terreus AUMC 14278 for pectinase(225.43 IU/ml/min).
文摘In the present study,a novel fungus belonging to the genus Aspergillus section Circumdati was isolated from a cultivated soil sample close to El-Gaar lake in Wadi-El-Natron region,Egypt.Sequence of the internal transcribed spacer(ITS)gene of its DNA showed that the isolate differs from all known Aspergillus species in section Circumdati.The novel Aspergillus species is described here as Aspergillus gaarensis.Phenotypic characteristics and molecular data were applied to determine its novel taxonomic status.Both macro and micro characteristics of the novel species are presented in the current study.
