NDLI: Complexity of dsRNA Mycovirus Isolated from Fusarium graminearum

Content Provider	Springer Nature Link
Author	Chu, Yeon Mee Lim, Won Seok Yea, Sang Jin Cho, Jeom Deog Lee, Yin Won Kim, Kook Hyung
Copyright Year	2004
Abstract	Fusarium graminearum is the causal agent of a serious scab disease of small grains in Korea. We screened 827 isolates of F. graminearum from diseased barley and maize and tested for the presence of double-stranded RNA (dsRNA) mycovirus. Of them, 19 isolates contained various sizes of dsRNAs. A dsRNA associated with pronounced morphological changes including reduction in mycelial growth, increase in dark orange to red pigmentation, reduced sporulation and virulence was previously observed in nine dsRNA-containing Fusarium isolates (Chu et al., Appl Env Microbiol 68, 2529–2534, 2002). Ten additional isolates were found infected with dsRNA mycoviruses. These mycoviruses contain 2–4 different segments of dsRNAs with the size-range of approximately 1.7–10 kbp in length. The presence of dsRNAs did not affect colony morphology and were transmissible through conidia and ascospore with incidence of 30–100%. Interestingly, dsRNA mycovirus found in F. graminearum isolates, JB33 and JNKY19, that show the pattern of mixed infection of two different viruses were transmitted to all progeny conidia and ascospores. These results indicate that there is genomic diversity of dsRNA mycoviruses that infect F. graminearum isolates and that impact of virus infection on host's morphology and virulence is determined by the interaction between dsRNAs and the fungal host, not by the mere presence of the dsRNAs.
Starting Page	135
Ending Page	143
Page Count	9
File Format	PDF
ISSN	09208569
Journal	Virus Genes
Volume Number	28
Issue Number	1
e-ISSN	1572994X
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2004-01-01
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Medical Microbiology Virology Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Virology Genetics Medicine Molecular Biology

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