Summary
As described in other invertebrate muscles, most thick myofilaments of the dorsal longitudinal muscle of Sabellastarte magnifica appear to be obliquely arranged with respect to the longitudinal axis of the myofibrils. Some sections, however, show long bundles of myofilaments parallel to the longitudinal axis of the myofibrils. Since the oblique striation concept cannot account for such images, a different (longitudinal) arrangement is proposed for Sabellastarte which can account for all observed images. A wax and threads model built according to this arrangement has been used to demonstrate that by oblique sectioning the longitudinal model can generate a false appearance of filament obliquity.
Similar content being viewed by others
References
Hanson, J.: The structure of the smooth muscle fibres in the body wall of the earthworm. J. biophys. biochem. Cytol. 3, 111–122 (1957).
Hanson, J., Lowy, J.: The structure of the muscle fibers in the translucent part of the adductor of the oyster Crassostrea angulata. Proc. roy. Soc. B 154, 173–196 (1961).
Huxley, A. F., Hanson, J.: Changes in the cross striations of muscle during contraction and stretch and their structural interpretation. Nature (Lond.) 173, 973–997 (1954).
Huxley, A. F., Niedegerke, R.: Structural changes in muscle during contraction. Nature (Lond.) 173, 971–972 (1954).
Millonig, G.: Further observations on a phosphate buffer for osmium solutions in fixation. Proceedings of the Fifth Internat. Congr. for Electron Microscopy, Philadelphia (S. S. Breese, ed.), 2, 8 (1962).
Pucci, I., Afzelius, B. A.: An electron microscope study of sarcotubules and related structures in the leech muscle. J. Ultrastruct. Res. 7, 210–224 (1962).
Richardson, K. C., Jarret, L., Finke, E. H.: Embedding in epoxy resins for ultrathin sectioning in electron microscopy. Stain Technol. 35, 313–323 (1960).
Rosenbluth, J.: Ultrastructural organization of obliquely striated muscle fibers in Ascaris lumbricoides. J. Cell Biol. 25, 495–515 (1965).
Rosenbluth, J.: Obliquely striated muscle III. Contraction mechanism of Ascaris body muscle. J. Cell Biol. 34, 15–33 (1967).
Rosenbluth, J.: Obliquely striated muscle. IV. Sarcoplasmic reticulum, contractile apparatus, and endomysium of the body muscle of a polychaete, Glycera, in relation to its speed. J. Cell Biol. 36, 245–259 (1968).
Venable, J. H., Coggeshall, R.: A simplified lead citrate stain for use in electron microscopy. J. Cell Biol. 25, 407–408 (1965).
Wissocq, J. C.: Evolution de la musculature longitudinale dorsale et ventrale au cours de la stolonisation de Syllis amica Quatrefages. J. Microscopie 9, 355–388 (1970).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Gonzalez-Aguilar, F. Non-oblique myofilament arrangement in the dorsal muscle of Sabellastarte magnifica . Z. Zellforsch 129, 11–19 (1972). https://doi.org/10.1007/BF00307106
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00307106