alexa Autophagic fungal cell death is necessary for infection by the rice blast fungus.
Microbiology

Microbiology

Journal of Plant Pathology & Microbiology

Author(s): VeneaultFourrey C, Barooah M, Egan M, Wakley G, Talbot NJ

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Abstract Rice blast is caused by the fungus Magnaporthe grisea, which elaborates specialized infection cells called appressoria to penetrate the tough outer cuticle of the rice plant Oryza sativa. We found that the formation of an appressorium required, sequentially, the completion of mitosis, nuclear migration, and death of the conidium (fungal spore) from which the infection originated. Genetic intervention during mitosis prevented both appressorium development and conidium death. Impairment of autophagy, by the targeted mutation of the MgATG8 gene, arrested conidial cell death but rendered the fungus nonpathogenic. Thus, the initiation of rice blast requires autophagic cell death of the conidium. This article was published in Science and referenced in Journal of Plant Pathology & Microbiology

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