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The Role of Lipid Signaling and Metabolism in Morphogenesis and Pathogenesis of the Fungal Pathogen Ustilago Maydis

12 View(s), published at 2007, written by Jana Klose, published by ProQuest
The Role of Lipid Signaling and Metabolism in Morphogenesis and Pathogenesis of the Fungal Pathogen Ustilago Maydis

The role of lipid signaling and metabolism in morphogenesis and pathogenesis of the fungal pathogen ustilago maydis by Jana Klose The phytopathogenic fungus Ustilago maydis is obligately dependent on infection of maize to complete the sexual phase of its life cycle. Mating interactions between budding cells establish an infectio.... Published date on: 2007 with total page: 205 pages. Publisher of The Role of Lipid Signaling and Metabolism in Morphogenesis and Pathogenesis of the Fungal Pathogen

The phytopathogenic fungus Ustilago maydis is obligately dependent on infection of maize to complete the sexual phase of its life cycle. Mating interactions between budding cells establish an infectious filamentous cell type that invades the host, induces tumors, and forms teliospores. The yeast-to-filamentous morphological transition is regulated by cAMP and MAPK signaling pathways known to control the pathogenic development in the host. The signals influencing this transition during infection have not yet been identified. In this study, we demonstrated that lipids triggered the dimorphic switch to promote a filamentous phenotype resembling the infectious filaments found in planta, which was dependent on cAMP and Ras/MAPK signaling. In addition, low levels of lipids (4nM) induced the response suggesting that they are acting as ligands to trigger the morphological change. Overall, lipids may represent one of the signals that promotes and maintains filamentation of the fungus in the host.

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