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    Basal bodies and associated structures are not required for normal flagellar motion or phototaxis in the green alga Chlorogonium elongatum

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    Authors
    Hoops, Harold J.
    Witman, George B.
    UMass Chan Affiliations
    Department of Cell Biology
    Document Type
    Journal Article
    Publication Date
    1985-01-01
    Keywords
    Algae, Green
    Chlamydomonas
    Flagella
    Interphase
    Microscopy, Electron
    Species Specificity
    Algae
    Cell Biology
    Cells
    
    Metadata
    Show full item record
    Link to Full Text
    http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2113479
    Abstract
    The interphase flagellar apparatus of the green alga Chlorogonium elongatum resembles that of Chlamydomonas reinhardtii in the possession of microtubular rootlets and striated fibers. However, Chlorogonium, unlike Chlamydomonas, retains functional flagella during cell division. In dividing cells, the basal bodies and associated structures are no longer present at the flagellar bases, but have apparently detached and migrated towards the cell equator before the first mitosis. The transition regions remain with the flagella, which are now attached to a large apical mitochondrion by cross-striated filamentous components. Both dividing and nondividing cells of Chlorogonium propagate asymmetrical ciliary-type waveforms during forward swimming and symmetrical flagellar-type waveforms during reverse swimming. High-speed cinephotomicrographic analysis indicates that waveforms, beat frequency, and flagellar coordination are similar in both cell types. This indicates that basal bodies, striated fibers, and microtubular rootlets are not required for the initiation of flagellar beat, coordination of the two flagella, or determination of flagellar waveform. Dividing cells display a strong net negative phototaxis comparable to that of nondividing cells; hence, none of these structures are required for the transmission or processing of the signals involved in phototaxis, or for the changes in flagellar beat that lead to phototactic turning. Therefore, all of the machinery directly involved in the control of flagellar motion is contained within the axoneme and/or transition region. The timing of formation and the positioning of the newly formed basal structures in each of the daughter cells suggests that they play a significant role in cellular morphogenesis.
    Source

    J Cell Biol. 1985 Jan;100(1):297-309.

    DOI
    10.1083/jcb.100.1.297
    Permanent Link to this Item
    http://hdl.handle.net/20.500.14038/26552
    PubMed ID
    3965476
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    Link to Article in PubMed

    ae974a485f413a2113503eed53cd6c53
    10.1083/jcb.100.1.297
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