title: New sources of cytochalasins A and B from dematiaceous hyphomycetes.
abstract: One hundred isolates of 27 species belonging to 13 genera of dematiaceous hyphomycetes were screened for production of cytochalasins A and B. Most of these isolates (94) were obtained from Assiut University Culture Collection, Botany Department, Faculty of Science, Assiut University, Egypt; three isolates from CBS, The Netherlands; two isolates from DSM, Germany; and one isolate from IMI, UK. The results revealed that 10 isolates of six species representing five genera of fungi produced cytochalasins A and/or B. These species are Alternaria chlamydospora, Cochliobolus spicifer, Diplococcum spicatum, Phoma herbarum, Phoma multipora and Setosphaeria rostrata. This is the first report for the production of cytochalasins A and/or B by these species of dematiaceous hyphomycetes.
authors.affiliation: Department of Botany, Faculty of Science, Assiut University, Egypt.
authors.forename: A A
authors.initials: AA
authors.lastname: Zohri
authors.forename: S M
authors.initials: SM
authors.lastname: Saber
mesh_terms: D003571:Cytochalasin B / Q000302:isolation & purification / Q000378:metabolism*; D003572:Cytochalasins / Q000096:biosynthesis* / Q000302:isolation & purification; D003904:Mitosporic Fungi / Q000378:metabolism*; D013045:Species Specificity
chemical_list: D003572:Cytochalasins; C031218:cytochalasin A; D003571:Cytochalasin B