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Mucor dimorphism.

M Orlowski1

  • 1Department of Microbiology, Louisiana State University, Baton Rouge 70803.

Microbiological Reviews
|June 1, 1991
PubMed
Summary
This summary is machine-generated.

Mucor fungi exhibit dimorphism, switching between yeast and hyphal forms. Understanding cell wall synthesis and gene regulation is key to unlocking the mechanisms of this eukaryotic cellular morphogenesis.

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Area of Science:

  • Microbiology
  • Cell Biology
  • Mycology

Background:

  • Mucor species display dimorphism, existing as yeasts in anaerobic conditions and hyphae in aerobic environments.
  • This morphological plasticity makes Mucor an excellent model for studying eukaryotic cellular morphogenesis.
  • Differences in cell wall composition and polymer deposition exist between yeast and hyphal forms.

Purpose of the Study:

  • To critically review biochemical and physiological parameters correlated with Mucor morphogenesis.
  • To explore the role of the chitosome in chitin-chitosan microfibril assembly and deposition.
  • To investigate the application of molecular genetics in understanding Mucor dimorphism.

Main Methods:

  • Literature review of biochemical and physiological correlates of morphogenesis.

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  • Analysis of cell wall synthesis, focusing on enzyme control and chitosome function.
  • Application of molecular genetics techniques, including gene cloning, sequencing, and transcriptional analysis.

    • Main Results:

    • Cell wall polymer deposition differs significantly between yeast (isodiametric) and hyphal (apical) forms.
    • Several genes correlating with fungal development have been identified and analyzed for transcriptional activity.
    • Selective translation of stored mRNA is observed during sporangiospore germination.

    Conclusions:

    • Elucidating the precise function of the chitosome is critical for understanding Mucor dimorphism.
    • Molecular genetics provides powerful tools for explaining previously described, but unexplained, correlates of morphogenesis.
    • Further research integrating molecular and biochemical approaches will advance the study of Mucor dimorphism.