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Flagellar beat patterns and their possible evolution

M A Sleigh

    Bio Systems
    |January 1, 1981
    PubMed
    Summary
    This summary is machine-generated.

    Flagella in unicellular organisms drive locomotion and food particle collection. Sophisticated flagellar mechanisms likely evolved for feeding, with some groups later developing photosynthesis through symbiosis.

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    Area of Science:

    • Cell Biology
    • Evolutionary Biology
    • Microbiology

    Background:

    • Flagella are crucial organelles in various unicellular organisms.
    • Flagellar function impacts both cell motility and nutrient acquisition.
    • Efficient particle feeding necessitates specialized flagellar or cellular adaptations.

    Purpose of the Study:

    • To describe the diverse roles and functioning of flagella in unicellular life.
    • To investigate the evolutionary pressures shaping flagellar mechanisms, particularly for feeding.
    • To explore the link between heterotrophic feeding strategies and the evolution of photosynthesis.

    Main Methods:

    • Review of existing literature on flagellar function in diverse unicellular groups.
    • Comparative analysis of flagellar structures and activities related to locomotion and phagocytosis.

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  • Examination of evolutionary pathways linking heterotrophy to autotrophy via symbiosis.

    • Main Results:

    • Flagellar propulsion aids locomotion and facilitates the capture of food particles.
    • Complex flagellar activities are often optimized for efficient particulate food collection.
    • Sophisticated flagellar mechanisms appear to have evolved primarily for heterotrophic feeding.

    Conclusions:

    • Flagellar evolution is strongly linked to the demands of heterotrophic nutrition, especially particle feeding.
    • Divergent flagellar mechanisms arose in response to feeding requirements.
    • The acquisition of plastids in some flagellate groups likely resulted from phagocytosis and subsequent symbiosis with photosynthetic prokaryotes.