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Updated: Jun 28, 2026

Application of Membrane and Cell Wall Selective Fluorescent Dyes for Live-Cell Imaging of Filamentous Fungi
Published on: November 28, 2019
Cell fusion in the filamentous fungus, Neurospora crassa
André Fleissner1, Anna R Simonin, N Louise Glass
1Department of Plant and Microbial Biology, The University of California, Berkeley, CA, USA.
Abstract:
Hyphal fusion occurs at different stages in the vegetative and sexual life cycle of filamentous fungi. Similar to cell fusion in other organisms, the process of hyphal fusion requires cell recognition, adhesion, and membrane merger. Analysis of the hyphal fusion process in the model organism Neurospora crassa using fluorescence and live cell imaging as well as cell and molecular biological techniques has begun to reveal its complex cellular regulation. Several genes required for hyphal fusion have been identified in recent years. While some of these genes are conserved in other eukaryotic species, other genes encode fungal-specific proteins. Analysis of fusion mutants in N. crassa has revealed that genes previously identified as having nonfusion-related functions in other systems have novel hyphal fusion functions in N. crassa. Understanding the molecular basis of cell fusion in filamentous fungi provides a paradigm for cell communication and fusion in eukaryotic organisms. Furthermore, the physiological and developmental roles of hyphal fusion are not understood in these organisms; identifying these mechanisms will provide insight into environmental adaptation.
Insights
Filamentous fungi use hyphal fusion for growth and reproduction. Researchers are uncovering the complex genetic regulation of this process in Neurospora crassa, revealing novel functions for known genes.
Area of Science:
- Mycology
- Cell Biology
- Genetics
Background:
- Hyphal fusion is a critical process in the life cycle of filamentous fungi, essential for both vegetative growth and sexual reproduction.
- This process shares fundamental mechanisms with cell fusion in other eukaryotes, involving cell recognition, adhesion, and membrane merger.
Purpose of the Study:
- To elucidate the complex cellular regulation of hyphal fusion in the model filamentous fungus Neurospora crassa.
- To identify and characterize genes involved in hyphal fusion, including conserved and fungal-specific proteins.
Main Methods:
- Utilized fluorescence and live-cell imaging techniques.
- Employed cell and molecular biological approaches.
- Analyzed hyphal fusion mutants in Neurospora crassa.
Main Results:
- Identified several genes essential for hyphal fusion in Neurospora crassa.
- Discovered that some genes involved in hyphal fusion are conserved across eukaryotes, while others are fungal-specific.
- Revealed novel roles for genes with previously known non-fusion-related functions in the context of hyphal fusion.
Conclusions:
- Understanding hyphal fusion in filamentous fungi offers a paradigm for eukaryotic cell communication and fusion.
- Further research into the physiological and developmental roles of hyphal fusion is needed to understand environmental adaptation in fungi.
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