2018
DOI: 10.5424/fs/2017263-11060
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Short communication: Effect of mycoviruses on growth, spore germination and pathogenicity of the fungus Fusarium circinatum

Abstract: Aim of the study: To assess the impact on two mycoviruses recently described in F. circinatum mitovirus 1 and 2-2 (FcMV1 and FcMV2-2) on i) mycelial growth, ii) spore germination and iii) relative necrosis.Material and methods: Fourteen monosporic strains of F. circinatum (one of each pair infected with mycoviruses and the other without them) of the pathogen with and without viruses were selected for the assay. The statistical analysis, were a linear mixed model of analysis of variance considering one between-… Show more

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Cited by 7 publications
(9 citation statements)
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“…Previous in vitro studies showed contradictory results; total growth of the fungus on PDAS and spore germination was significantly reduced by the presence of mitoviruses FcMV1 and FcMV2-2 [19] whereas mitovirus-infected isolates did not show different extracellular laccase activity or mycelial growth rate (mm 2 /day) on Bavendamm's medium [18]. For in vivo studies, where the mitovirus infected and mitovirus-free isolates were inoculated on young seedlings, there were different results as well.…”
Section: Discussionmentioning
confidence: 77%
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“…Previous in vitro studies showed contradictory results; total growth of the fungus on PDAS and spore germination was significantly reduced by the presence of mitoviruses FcMV1 and FcMV2-2 [19] whereas mitovirus-infected isolates did not show different extracellular laccase activity or mycelial growth rate (mm 2 /day) on Bavendamm's medium [18]. For in vivo studies, where the mitovirus infected and mitovirus-free isolates were inoculated on young seedlings, there were different results as well.…”
Section: Discussionmentioning
confidence: 77%
“…For in vivo studies, where the mitovirus infected and mitovirus-free isolates were inoculated on young seedlings, there were different results as well. While Muñoz-Adalia et al [18] observed that FcMV1 led to higher fungal pathogenicity and lower survival of seedlings, Flores-Pacheco et al [19] obtained that there were no significant differences in the necrotic lesions caused by the pathogen irrespective of whether it was infected with the mitoviruses. In view of the above, it can be concluded that to date, the presence of mitoviruses has no clear pattern in the behavior of the Spanish isolates of the pathogen.…”
Section: Discussionmentioning
confidence: 98%
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“…Fusarium circinatum hosts several species and types of mitoviruses (Martínez‐Álvarez et al ., ; Vainio et al ., ), but the role the viruses play in pathogen virulence is not clear. While virulence of F. circinatum was enhanced on 1‐year‐old P. radiata seedlings (Muñoz‐Adalia et al ., ), mycelial growth of F. circinatum colonies and spore germination were significantly reduced by the virus presence under in vitro conditions (Flores‐Pacheco et al ., ). Current understanding of the occurrence of hypovirulence caused by viruses in F. circinatum remains poor.…”
Section: The Use Of Biological Control For Combating F Circinatummentioning
confidence: 99%