Author
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McAlpin, Cesaria |
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Submitted to: American Phytopathological Society Abstracts
Publication Type: Abstract Only Publication Acceptance Date: 8/4/2004 Publication Date: 6/12/2004 Citation: Mcalpin, C.E. 2004. Synnema and sclerotium production in aspergillus caelatus and the influence of substrate composition on their development in selected strains. American Phytopathological Society Abstracts. Interpretive Summary: Technical Abstract: The ability of Aspergillus caelatus, to produce synnemata and sclerotia was investigated. Forty-eight isolates of A. caelatus differed widely in their production of synnemata and sclerotia; 83% of the isolates produced varying numbers of synnemata and sclerotia and 17% produced neither sclerotia nor synnemata. Most strains produced synnemata and mostly sessile and few stipitate sclerotia on the same Czapek agar (CZA) plate. Two strains of A. caelatus were selected for further study because of the contrasting morphology of their synnemata and sclerotia: NRRL 25528, the type species which produced black sclerotia, and NRRL 26119, which formed tan sclerotia. CZA and CZA amended with dextrose, xylose, cellobiose, melibiose, and trehalose, as well as CZA amended with serine, threonine, KNO3, and NaNO3, produced abundant sclerotia and synnemata. The production of synnemata and stipitate/sessile sclerotia by several wild-type strains of A. caelatus further substantiates previous suggestions for an evolutionary link between the Aspergillus section Flavi and the synnematal species A. togoensis, which also produces stipitate sclerotia. |