Based on biochemical and physiological behavior, where isAspergillus egyptiacus better placed?

Zohri, A. A.; Ismail, M.A.

doi:10.1007/bf02814449

Cited by 5 publications

(2 citation statements)

References 19 publications

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“…Aspergillus deflectus produces several antibiotics, including desferritriacetylfusigen, which inhibits the growth of bacteria (Anke 1977), and deflectins, angular azaphilons, which have antibiotic properties, and exhibit lytic activities against bacteria and erythrocytes (Anke et al 1981). Aspergillus egyptiacus has been suggested to be more closely related to E. nidulans than to A. versicolor based on its biochemical behavior (Zohri & Ismail 1994). Aspergillus egyptiacus produces fumitremorgins and verruculogen, thus resembling A. caespitosus in that aspect.…”

Section: Resultsmentioning

confidence: 99%

New taxa in Aspergillus section Usti

Samson¹,

Varga²,

Meijer³

et al. 2011

Studies in Mycology

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Based on phylogenetic analysis of sequence data, Aspergillus section Usti includes 21 species, inclucing two teleomorphic species Aspergillus heterothallicus (= Emericella heterothallica) and Fennellia monodii. Aspergillus germanicus sp. nov. was isolated from indoor air in Germany. This species has identical ITS sequences with A. insuetus CBS 119.27, but is clearly distinct from that species based on β-tubulin and calmodulin sequence data. This species is unable to grow at 37 °C, similarly to A. keveii and A. insuetus. Aspergillus carlsbadensis sp. nov. was isolated from the Carlsbad Caverns National Park in New Mexico. This taxon is related to, but distinct from a clade including A. calidoustus, A. pseudodeflectus, A. insuetus and A. keveii on all trees. This species is also unable to grow at 37 °C, and acid production was not observed on CREA. Aspergillus californicus sp. nov. is proposed for an isolate from chamise chaparral (Adenostoma fasciculatum) in California. It is related to a clade including A. subsessilis and A. kassunensis on all trees. This species grew well at 37 °C, and acid production was not observed on CREA. The strain CBS 504.65 from soil in Turkey showed to be clearly distinct from the A. deflectus ex-type strain, indicating that this isolate represents a distinct species in this section. We propose the name A. turkensis sp. nov. for this taxon. This species grew, although rather restrictedly at 37 °C, and acid production was not observed on CREA. Isolates from stored maize, South Africa, as a culture contaminant of Bipolaris sorokiniana from indoor air in Finland proved to be related to, but different from A. ustus and A. puniceus. The taxon is proposed as the new species A. pseudoustus. Although supported only by low bootstrap values, F. monodii was found to belong to section Usti based on phylogenetic analysis of either loci BLAST searches to the GenBank database also resulted in closest hits from section Usti. This species obviously does not belong to the Fennellia genus, instead it is a member of the Emericella genus. However, in accordance with the guidelines of the Amsterdam Declaration on fungal nomenclature (Hawksworth et al. 2011), and based on phylogenetic and physiological evidence, we propose the new combination Aspergillus monodii comb. nov. for this taxon. Species assigned to section Usti can be assigned to three chemical groups based on the extrolites. Aspergillus ustus, A. granulosus and A. puniceus produced ustic acid, while A. ustus and A. puniceus also produced austocystins and versicolorins. In the second chemical group, A. pseudodeflectus produced drimans in common with the other species in this group, and also several unique unknown compounds. Aspergillus calidoustus isolates produced drimans and ophiobolins in common with A. insuetus and A. keveii, but also produced austins. Aspergillus insuetus isolates also produced pergillin while A. keveii isolates produced nidulol. In the third chemical group, E. heterothallica has been reported to produce emethallicins, 5'-hydro...

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Section: Resultsmentioning

confidence: 99%

New taxa in Aspergillus section Usti

Samson¹,

Varga²,

Meijer³

et al. 2011

Studies in Mycology

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“…found that all the isolates tested of Aspergillus nidulans (= E. nidulans) produced this toxin. Also, E. nidulans was recorded as sterigamatocystin producer in several other studies (Bennett et al, 1989;Zohri and Ismail, 1994). Sterigmatocystin was reported to be both hepatotoxic and carcinogenic (Lillehoj and Ciegler, 1968).…”

Section: Mucormentioning

confidence: 92%

Isolation and identification of toxigenic fungi from foodstuffs at Sohag Governorate, Egypt

Zohri

Mohamed

Youssef

et al. 2014

Journal of Environmental Studies

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The common fungi contaminated different 25 foodstuffs collected from Sohag Governorate were isolated and their ability to produce mycotoxins were examined. A total of 150 fungal isolates belonging to 57 species in addition to two species varieties of 13 genera were isolated and identified. The genus Aspergillus was represented by 23 species in addition to two species-varieties followed by Penicillium which was represented by 11 species. The genus Fusarium was represented by 6 species followed by Alternaria (4), Mucor (3), Trichoderma (2) and Achremonium (2 species). The remaining 6 genera were represented by only one species for each genus. All the 150 collected fungal isolates were screened for their ability to produce mycotoxins. The results indicated that 53 out of the 150 fungal isolates (35%) were able to produce one or more of eight mycotoxins (aflatoxin, ochratoxin, fuminisin, sterigmatocystin, patulin, zearalenone, alternariol and diacetoxyscirpenol).

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Progesterone transformation as a biochemical aid in classification of the genusEmericella

Zohri¹

2000

Folia Microbiol

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A total of 65 isolates representing 13 Emericella taxa (5 isolates of each of 12 species and 1 variety) had the ability to transform progesterone into 11 alpha-hydroxyprogesterone. A systematic variation could be observed between the different tested Emericella taxa with respect to the transformation products. The isolates were divided according to the transformation types into six groups: (1) progesterone was hydroxylated into 6 beta-hydroxyprogesterone, 11 alpha-hydroxyprogesterone and 6 beta,11 alpha-dihydroxyprogesterone--found in Emericella acristata and E. dentata; (2) E. aurantio-brunna and E. parvathecia hydroxylated progesterone into 11 alpha-hydroxyprogesterone, 17 alpha-hydroxyprogesterone and 11 alpha,17 alpha-dihydroxyprogesterone; (3) E. nidulans and E. quadrilineata formed the same three products as members of group (2) and form epicortisol; (4) E. nidulans var. lata, E. bicolor and E. variecolor transformed progesterone into a mixture of mono-, di- and trihydroxy products; (5) E. striata and E. sublata exhibited an oxidative splitting of the progesterone side chain in position C-17 and hydroxylated progesterone into mono- and dihydroxy products; (6) E. rugulosa and E. unguis had the ability to degrade progesterone side-chain and to hydroxylate it into mono-, di- and trihydroxy products. This biochemical differentiation may supplement the morphological and other biochemical criteria used in the classification of the Emericella taxa.

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Based on biochemical and physiological behavior, where isAspergillus egyptiacus better placed?

Cited by 5 publications

References 19 publications

New taxa in Aspergillus section Usti

New taxa in Aspergillus section Usti

Isolation and identification of toxigenic fungi from foodstuffs at Sohag Governorate, Egypt

Progesterone transformation as a biochemical aid in classification of the genusEmericella

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