Boophilus microplus Infection by Beauveria amorpha andBeauveria bassiana: SEM Analysis and Regulation of Subtilisin-like Proteases and Chitinases
| Autor: | Márcia Vanusa da Silva, Marilene Henning Vainstein, Augusto Schrank, Juliano Tomazzoni Boldo, Neiva Monteiro de Barros, Walquíria Arruda, João Lúcio Azevedo, Roberta Alvares Campos |
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| Rok vydání: | 2005 |
| Předmět: |
Beauveria bassiana
Chitin Bassiana Fungus Tick Applied Microbiology and Biotechnology Microbiology chemistry.chemical_compound Ticks Ascomycota parasitic diseases Animals Pathogen biology Chitinases fungi General Medicine biology.organism_classification chemistry Amorpha Chitinase biology.protein Pest Control Peptide Hydrolases |
| Zdroj: | Current Microbiology. 50:257-261 |
| ISSN: | 1432-0991 0343-8651 |
| Popis: | Beauveria bassiana is a well-known broad-range arthropod pathogen which has been used in biological control of several pest insects and ticks such as Boophilus microplus. Beauveria amorpha has both endophytic and entomopathogenic characteristics, but its capacity for biological control has still not been studied. During the processes of host infection, B. bassiana and B. amorpha produce several hydrolytic extracellular enzymes, including proteases and chitinases, which probably degrade the host cuticle and are suggested to be pathogenicity determinants. To access the role of these enzymes during infection in the tick B. microplus, we analyzed their secretion during fungus growth in single and combined carbon sources, compared to complex substrates such as chitin and B. microplus cuticle. Chitin and tick cuticle-induced chitinase in both fungus and protease was induced only by tick cuticle. SEM analysis of B. amorpha and B. bassiana infecting B. microplus showed apressorium formation during penetration on cattle tick cuticle. |
| Databáze: | OpenAIRE |
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