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Related Experiment Videos

Ultrastructural changes in Cladosporium cucumerinum during pathogenesis.

F Laborda, D P Maxwell

    Canadian Journal of Microbiology
    |March 1, 1976
    PubMed
    Summary

    This study reveals distinct ultrastructural changes in Cladosporium cucumerinum during cucumber infection. Organelle abundance shifts, particularly microbodies, lipid bodies, and mitochondria, correlating with different pathogenesis stages.

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    Area of Science:

    • Plant Pathology
    • Mycology
    • Cell Biology

    Background:

    • Cladosporium cucumerinum is a fungal pathogen causing significant crop losses.
    • Understanding fungal pathogenesis at the ultrastructural level is crucial for developing control strategies.

    Purpose of the Study:

    • To investigate the ultrastructural changes in Cladosporium cucumerinum during the pathogenesis of cucumber cotyledons.
    • To correlate organelle abundance with different stages of fungal infection.

    Main Methods:

    • Transmission electron microscopy was used to examine fungal structures.
    • Ultrastructural analysis focused on organelles such as lipid bodies, microbodies, and mitochondria.

    Main Results:

    • Prepenetration structures showed abundant lipid bodies, microbodies, and mitochondria.
    • During invasion, lipid bodies were scarce, microbodies reduced, and mitochondria exhibited morphological changes.
    • Colonizing hyphae displayed abundant microbodies, few lipid bodies, and invasion-stage mitochondria.

    Conclusions:

    • Observed shifts in organelle populations suggest dynamic metabolic adaptations by the fungus during pathogenesis.
    • These ultrastructural variations are likely linked to the pathogen's metabolic requirements at different infection stages.

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