| Literature DB >> 17126542 |
Patricia R Dalzoto1, Chirlei Glienke-Blanco, Vanessa Kava-Cordeiro, Juliana Z Ribeiro, Elliot Watanabe Kitajima, João Lúcio Azevedo.
Abstract
Beauveria bassiana strains from different hosts and geographic origins were assayed for the presence of double-stranded RNA (dsRNA). Two of them (15.4%) showed extra bands, with approximately 4.0-3.5 kb and 2-0.7 kb, respectively, after electrophoretic separation of undigested nucleic acids. Virus-like particles were approximately 28-30 nm diam. The dsRNA was maintained after conidiogenesis (vertical transmission) and was transmitted horizontally by hyphal anastomosis. Strains purged of dsRNA obtained after cycloheximide treatment showed increased conidial production when compared with strains carrying dsRNA particles. Bioassays demonstrated hypovirulence associated with dsRNA. The mean mortality against the insect Euschistus heros was reduced in strains containing dsRNA when compared with the isogenic dsRNA-free ones.Entities:
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Year: 2006 PMID： 17126542 DOI： 10.1016/j.mycres.2006.08.009
Source DB: PubMed Journal: Mycol Res ISSN： 0953-7562