Physical-chemical plant-derived signals induce differentiation inUstilago maydis
| Autor: | Armin Djamei, Miroslav Vranes, Mohamed A. Marahiel, Uwe Linne, Patrick Berndt, Jörg Kämper, Carolin Weise, Regine Kahmann, Artemio Mendoza-Mendoza |
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| Rok vydání: | 2009 |
| Předmět: |
Mating type
Hypha MAP Kinase Signaling System Ustilago Hyphae Cutin Zea mays Microbiology Pheromones Protein filament Membrane Lipids Gene Expression Regulation Fungal Promoter Regions Genetic Molecular Biology Dikaryon Appressorium biology Fatty Acids fungi Fungal genetics food and beverages RNA Fungal Genes Mating Type Fungal biology.organism_classification Cell biology Plant Leaves Hydrophobic and Hydrophilic Interactions Signal Transduction |
| Zdroj: | Molecular Microbiology. 71:895-911 |
| ISSN: | 1365-2958 0950-382X |
| DOI: | 10.1111/j.1365-2958.2008.06567.x |
| Popis: | Ustilago maydis is able to initiate pathogenic development after fusion of two haploid cells with different mating type. On the maize leaf surface, the resulting dikaryon switches to filamentous growth, differentiates appressoria and penetrates the host. Here, we report on the plant signals required for filament formation and appressorium development in U. maydis. In vitro, hydroxy-fatty acids stimulate filament formation via the induction of pheromone genes and this signal can be bypassed by genetically activating the downstream MAP kinase module. Hydrophobicity also induces filaments and these resemble the dikaryotic filaments formed on the plant surface. With the help of a marker gene that is specifically expressed in the tip cell of those hyphae that have formed an appressorium, hydrophobicity is shown to be essential for appressorium development in vitro. Hydroxy-fatty acids or a cutin monomer mixture isolated from maize leaves have a stimulatory role when a hydrophobic surface is provided. Our results suggest that the early phase of communication between U. maydis and its host plant is governed by two different stimuli. |
| Databáze: | OpenAIRE |
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