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Título: | Incompatibility between proliferation and plant invasion is mediated by a regulator of appressorium formation in the corn smut fungus Ustilago maydis |
Autor: | Torre, Antonio de la CSIC; Castanheira, Sónia CSIC ORCID; Pérez-Martín, José CSIC ORCID | Palabras clave: | Cell cycle regulation Phytopathogenic fungi Appressorium Corn smut |
Fecha de publicación: | 1-dic-2020 | Editor: | National Academy of Sciences (U.S.) | Citación: | Proceedings of the National Academy of Sciences of the USA 117(48): 30599–30609 (2020) | Resumen: | Plant pathogenic fungi often developed specialized infection structures to breach the outer surface of a host plant. These structures, called appressoria, lead the invasion of the plant by the fungal hyphae. Studies in different phytopathogenic fungi showed that appressorium formation seems to be subordinated to the cell cycle. This subordination ensures the loading in the invading hypha of the correct genetic information to proceed with plant infection. However, how the cell cycle transmits its condition to the genetic program controlling appressorium formation and promoting the plant’s invasion is unknown. Our results have uncovered how this process occurs for the appressorium of Ustilago maydis, the agent responsible for corn smut disease. Here, we described that the complex Clb2-cyclin-dependent kinase (Cdk)1, one of the master regulators of G2/M cell cycle progression in U. maydis, interacts and controls the subcellular localization of Biz1, a transcriptional factor required for the activation of the appressorium formation. Besides, Biz1 can arrest the cell cycle by down-regulation of the gene encoding a second b-cyclin Clb1 also required for the G2/M transition. These results revealed a negative feedback loop between appressorium formation and cell cycle progression in U. maydis, which serves as a “toggle switch” to control the fungal decision between infecting the plant or proliferating out of the plant. | Descripción: | Título en el postprint: Mutual repression between proliferation and plant invasion is mediated by a master regulator of appressorium formation in the corn smut fungus Ustilago maydis. | Versión del editor: | https://doi.org/10.1073/pnas.2006909117 | URI: | http://hdl.handle.net/10261/230702 | DOI: | 10.1073/pnas.2006909117 | ISSN: | 0027-8424 | E-ISSN: | 1091-6490 |
Aparece en las colecciones: | (IBFG) Artículos |
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Ustilago-maydis.pdf | 7,65 MB | Adobe PDF | Visualizar/Abrir |
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