dsRNA-induced gene silencing in Moniliophthora perniciosa, the causal agent of witches’ broom disease of cacao |
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| Authors: | AC Carib dos Santos JAL Sena SC Santos CV Dias CP Pirovani C Pungartnik RR Valle JCM Cascardo M Vincentz |
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| Institution: | aDepartamento de Ciências Biológicas, Universidade Estadual de Santa Cruz, Rodovia Ilhéus – Itabuna, Km 16, CEP 45662-000 Ilhéus, BA, Brazil;bCentro de Pesquisas do Cacau, CEPLAC, Rodovia Ilhéus – Itabuna, Km 22, CEP 45662-000 Ilhéus, BA, Brazil;cDepartamento de Biologia Vegetal, Universidade Estadual de Campinas, SP, Brazil |
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| Abstract: | The genome sequence of the hemibiotrophic fungus Moniliophthora perniciosa revealed genes possibly participating in the RNAi machinery. Therefore, studies were performed in order to investigate the efficiency of gene silencing by dsRNA. We showed that the reporter gfp gene stably introduced into the fungus genome can be silenced by transfection of in vitro synthesized gfpdsRNA. In addition, successful dsRNA-induced silencing of endogenous genes coding for hydrophobins and a peroxiredoxin were also achieved. All genes showed a silencing efficiency ranging from 18% to 98% when compared to controls even 28 d after dsRNA treatment, suggesting systemic silencing. Reduction of GFP fluorescence, peroxidase activity levels and survival responses to H2O2 were consistent with the reduction of GFP and peroxidase mRNA levels, respectively. dsRNA transformation of M. perniciosa is shown here to efficiently promote genetic knockdown and can thus be used to assess gene function in this pathogen. |
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| Keywords: | Crinipellis perniciosa Theobroma cacao RNAi Peroxidase GFP Hydrophobins |
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