Article Abstract:
Twenty fungal cultures were tested for ice nucleation activity (INA) at -5.0 degrees celsius using a modified tube nucleation test. The results showed that only Fusarium acuminatum and F. avenaceum possessed INA. Characterization of the Fusarium ice nuclei showed that they are cell free, stable up to 60 degrees celsius and have sizes less than 0.22 microns. Comparisons with other types of ice nuclei showed that the fungal ice nuclei are most similar to the leaf-derived ice nuclei. INA may be used as a basis of identification of these species, and may have important applications in biotechnology.
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Article Abstract:
The toxicity of selected Fusarium strains depends on the biological activity of the metabolites they produce. This was based on the results of the investigation done on some Fusarium strains section Sporotrichiella. Results ofbioassays showed that the toxicity of each particular strain tested was due to the metabolites each produced. Major mycotoxins produced were tricothecenes with visoltricin and chlamydosporol as secondary metabolites. Toxicity of each strain was based on its activity against Artemia salina larvae and to the blastogenic response of human and bovine lymphocytes.
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Article Abstract:
Expressed sequence tag (EST) sequencing of Fusarium oxysporum and used cDNA arrays to analyze gene expression of profiles during the conidial germination process to highlight asexual filamentous fungus at the molecular level during fungal development. It showed that ras and other signaling genes, cooperatively initiate conidial germination of Fusarium by increasing protein synthesis.
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