Summary
Structure and composition of the walls of normal and apolar embryos ofFucus vesiculosus L. were studied. Fucoidin was found in an amorphous outer layer and in an inner fibrillar layer of the wall, mainly at the rhizoid pole. Also in apolar embryos this inner layer was present; it was markedly thickened at the presumptive site of rhizoid formation.
We suggest that initiation and extension of the rhizoid is accompanied by apposition of new fibrillar wall material containing sulphated polysaccharides on the inner side of the wall at the rhizoid pole. In apolar embryos this material accumulates at this pole.
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References
Crayton, M. A., E. Wilson, andR. S. Quatrano, 1974: Sulfatation of fucoidan inFucus embryos. II. Separation from initation of polar growth. Devel. Biol.39, 164–167.
Hogsett, W. E., andR. S. Quatrano, 1975: Isolation of polysaccharides sulfated during early embryogenesis inFucus, Plant Physiol.55, 25–29.
Kiermayer, O., 1964: Untersuchungen über die Morphogenese und Zellwandbildung beiMicrasterias denticulata Bréb. Protoplasma59, 76–132.
McCully, M. E., 1970: The histological localization of the structural polysaccharides of seaweeds. Ann. N.Y. Acad. Sci.175, 703–711.
Moon Novotny, A., andM. Forman, 1974: The relationship between changes in the cell wall composition and the establishment of polarity inFucus embryos. Devel. Biol.40, 162–173.
— —, 1975: The composition and development of cell walls ofFucus embryos. Planta122, 67–78.
Murphy, T. M., A. Kahn, andA. Lang, 1970: Stabilization of the polarity axis in the zygotes of someFucaceae. Planta90, 97–108.
Quatrano, R. S., 1972: An ultrastructural study of the determined site of rhizoid formation inFucus zygotes. Exp. Cell Res.70, 1–12.
—, 1973: Separation of processes associated with differentiation of two-celledFucus embryos. Devel. Biol.30, 209–213.
—, 1974: Developmental Biology: development in marine organisms. In: Experimental Marine Biology, pp. 303–346 (R. Mariscal, ed.). New York: Academic Press.
Reynolds, E. S., 1963: The use of lead citrate at high pH as an electron-opaque stain in electron microscopy. J. Cell Biol.17, 208–212.
Schröter, K., andA. Sievers, 1971: Wirkung der Turgorreduktion auf den Golgi-Apparat und die Bildung der Zellwand bei Wurzelhaaren. Protoplasma72, 203–211.
Sitte, P., 1962: Einfaches Verfahren zur stufenlosen Gewebe-Entwässerung für die elektronenmikroskopische Präparation. Naturwissenschaften49, 402–403.
Torrey, J. G., andE. Galun, 1970: Apolar embryos ofFucus vesiculosus resulting from osmotical and chemical treatment. Amer. J. Bot.57, 111–119.
Wardlaw, C. W., 1965: General physiological problems of embryogenesis in plants. In: Encyclopedia of Plant Physiology XV-1, pp. 424–442 (W. Ruhland, ed.). Berlin-Heidelberg-New York: Springer-Verlag.
Whitaker, D. M., 1931: Some observations on the eggs ofFucus and upon their mutual influence in the determination of the developmental axis. Biol. Bull.61, 294–308.
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Vreugdenhil, D., Dijkstra, M.L. & Libbenga, K.R. The ultrastructure of the cell wall of normal and apolar embryos ofFucus vesiculosus . Protoplasma 88, 305–313 (1976). https://doi.org/10.1007/BF01283254
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DOI: https://doi.org/10.1007/BF01283254