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Background  The rice blast is a typical fungal disease caused by  Magnaporthe oryzae , and the mitochondrial ATP-dependent Lon protease (MAP1) has been proven to be involved in blast development. We previously screened a C3HC type Zinc-finger domain protein (ZFC3), which is interacted with MAP1. The purpose of this research was to study the biological function of ZFC3 protein in  M. oryzae .    Results  We first confirmed that the ZFC3-RFP fusion protein is localized within the mitochondria. The deleted mutant strains of ZFC3 ( ∆ZFC3 ) showed the enhanced expression level of mtATP6, particularly mtATP8, and almost unchanged nATP9. Δ ZFC3  produces more conidia and more tolerance to multiple stressors. The knock-out strain shows more melanin accumulation suggests the susceptibility to aging. Δ ZFC3  displays faster early-stage hypha infiltration involved in MAP1-mediated pathogenicity in host rice.    Conclusion  These results support the view that ZFC3 is a key regulator involved in gene regulation, stress response, cell wall integrity, longevity, conidiation, infection hypha development and MAP1-mediated pathogenicity in  M. oryzae.

bmc microbiology

The C3HC type zinc-finger protein (ZFC3) interacting with Lon/MAP1 is important for mitochondrial gene regulation, infection hypha development and longevity of Magnaporthe oryzae