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Reconstruction of the flagellar apparatus and microtubular cytoskeleton inPyramimonas gelidicola (Prasinophyceae, Chlorophyta)

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Summary

The absolute configuration of the flagellar apparatus inPyramimonas gelidicola McFadden et al. has been determined and shows identity withP. obovata, indicating that they are closely related. Comparison with the flagellar apparatus of quadriflagellate zoospores from the more advancedChlorophyceae suggest thatPyramimonas may be a primitive ancestral form. The microtubular cytoskeleton has been examined in detail and is shown to be unusual in that it does not attach to the flagellar apparatus. Cytoskeletal microtubules are nucleated individually, and this is interpreted as an adaptation to the methods of mitosis and scale deployment. In view of the primitive nature of these processes, it is proposed that this type of cytoskeletal organization may represent a less advanced condition than that of the flagellar root MTOCs (microtubule organizing centers) observed in theChlorophyceae.

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  1. School of Botany, University of Melbourne, 3052, Parkville, Vic., Australia

    G. I. McFadden & R. Wetherbee

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  1. G. I. McFadden
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  2. R. Wetherbee
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McFadden, G.I., Wetherbee, R. Reconstruction of the flagellar apparatus and microtubular cytoskeleton inPyramimonas gelidicola (Prasinophyceae, Chlorophyta). Protoplasma 121, 186–198 (1984). https://doi.org/10.1007/BF01282312

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