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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Ref ID : 4024

Stephen F. NG and Ruth Jaeckel Williams; An Ultrastructural Investigation of 180 degrees-Rotated Ciliary Meridians in Tetrahymena pyriformis. J.Protozool. 24(2):257-263, 1977

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An ultrastructural investigation has been carried out on 180 degrees-rotated ciliary meridians (inverted meridians) in Tetrahymena pyriformis temperature-sensitive mutant (mol(b)/mol(b)), syngen 1, strain B. The longitudinal, transverse and postciliary microtubular bands, the kinetodesmal fiber, and the parasomal sac, are shown to be disposed at a 180 degrees angle to their normal positions or orientations. Other abnormalities are as follows: the first 2 basal bodies of the inverted meridian fail to organize into "couplets" and the inverted meridian intrudes into the anterior pole region; an extra longitudinal microtubular band is found in one of the cell lines.