Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"hypovirulence"”.
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Host-pathogen interactions in a segregating population of BC2F2 hybrid Castanea dentata and other chesnut hybirds after exposure to hypovirus-containing and hypvirus-free strains of Cryphonectria parasitica
… of host disease resistance and expression ofhypovirulence. The BC2F2 population varied from highly susceptible to highly resistant, as measured by Ep155 (virus-free) canker length at 95 days. Disease resistance in the CCTP population varied from highly susceptible to intermediately resistant. …
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Aspects relating to the spread and survival of Phellinus root rot
… of differences in root contacts or soil factors. Hypovirulence caused by a dsRNA virus was also investigated as a possible cause for the inactivation of Phellinus root rot centers. A survey of several isolates of P. weirii from British Columbia and the United States failed to reveal the presence …
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Reprogramming the expression of the double-stranded RNA mitovirus OnuMV1c from the mitochondria to the cytoplasm in the fungal pathogen Ophiostoma novo-ulmi
… occurring fungal viruses (mycoviruses) to induce hypovirulence in their fungal hosts. Hypovirulence, or attenuation of fungal pathogenicity using mycoviruses, has been well studied in other systems but has yet to be developed for O. novo-ulmi. A candidate virus, OnuMV1c, was found in an isolate of …
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Biology of virulent and hypovirulent Endothia parasitica on American chestnut (Castanea dentata)
… chestnut possibly would assist spread of hypovirulence (H) factors. The pathogenicity of the H isolate but not the V (virulent) isolate appeared to influence the size and sporulating characteristics of biocontrolled H+V cankers. The histopathology of canker development on blight-resistant …
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FUNCTIONAL CHARACTERIZATION OF PAPAIN-LIKE PROTEASE p48 REQUIRED FOR REPLICATION OF HYPOVIRUS CHV-1 RESPONSIBLE FOR VIRULENCE-ATTENTUATION OF THE CHESTNUT BLIGHT FUNGUS
… responsible for virulence attenuation (hypovirulence) of the chestnut blight fungus <italic>Cryphonectria parasitica</italic>, encodes two leader papain-like proteases, p29 and p48, at the N-terminus of ORF A and ORF B, respectively. Protease p29 has been shown to be dispensable for …
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Diversity, characteristics and potential for biological control of Sclerotinia sclerotiorum mycoviruses in New Zealand
… parasitica, and there are increasing reports of hypovirulence-mediating mycoviruses in other fungi, including S. sclerotiorum. Of the New Zealand S. sclerotiorum isolates tested, 73% contained double-stranded RNAs (dsRNAs), indicative of virus presence, some of which had a hypovirulent phenotype. …
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Effect of dsRNA-containing and dsRNA-free hypovirulent isolates of Fusarium oxysporum on severity of Fusarium seedling disease of Essex soybean
… The presence of dsRNA was not associated with hypovirulence in <I>F. oxysporum</I> since some hypovirulent isolates contained dsRNA while other hypovirulent isolates did not. Furthermore, of six dsRNA-containing <I>F. oxysporum</I> isolates, three were hypovirulent, two were moderately …
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Spread of White Hypovirulent Strains of Cryphonectria Parasitica Among American Chestnut Trees at the Lesesne State Forest
Sixty-two natural cankers on branches and main stems of three 16-year-old grafted American chestnut trees at the Lesesne State Forest were sampled for Cryphonectria parasitica. Cankers were sampled in 1996 and 1997 at various distances from the main stem zone on the grafts (ground to 183 cm) that …