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Hyphal chemotropism in fungal pathogenicity
David Turrà1, Daniela Nordzieke1, Stefania Vitale1
1Departamento de Genética, Campus de Excelencia Internacional Agroalimentario ceiA3, Universidad de Córdoba, 14071 Córdoba, Spain.
Seminars in Cell & Developmental Biology
|May 7, 2016
Summary
Fungi use filamentous hyphae to grow and sense chemical signals. Distinct MAPK pathways in Fusarium oxysporum control hyphal growth towards nutrients and signals, revealing complex chemosensing in host interactions.
Area of Science:
- Mycology
- Cell Biology
- Biochemistry
Background:
- Fungal growth relies on filamentous hyphae, which interact with diverse chemical cues.
- Understanding how fungi sense and respond to these signals (chemotropism) is crucial but incomplete.
- Model organisms like Saccharomyces cerevisiae and Neurospora crassa have aided chemotropism research.
Purpose of the Study:
- To investigate the molecular mechanisms underlying fungal chemotropism.
- To explore the complexity of chemosensing pathways in pathogenic fungi during host interactions.
Main Methods:
- Utilized Fusarium oxysporum as a model pathogen.
- Investigated distinct mitogen-activated protein kinase (MAPK) pathways involved in hyphal growth responses.
Main Results:
- Identified specific MAPK pathways that direct hyphal growth towards different chemical stimuli.
- Demonstrated differential pathway activation for nutrient sensing versus signaling molecule reception.
Conclusions:
- Fungal chemosensing involves complex, distinct signaling pathways.
- Pathogen-host interactions likely employ specialized MAPK cascades for effective hyphal guidance.
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