Structure of Pit Border in <i>Pinus Strobus</i> L.


  • Lidija Murmanis
  • Irving B. Sachs


Sections fro111 white pine trccs were studied by electrori lllicroscopy in a search for the organization of cell wall layers in the pit border. Depending on the developmental stage of the trachcids, or perhaps on technical imperfections, differences appeared in the pit border within the same tree species. From an electron micrograph of a mature latewood tracheicl, a diagram was reconstructed that appears to be the most representative structure for the pit border in white pine.


Bailey, I. W., and M. R. Vestal. 1937. The orientation of cellulose in the secondary wall of tracheary cells. J. Arnold Arboretum, 18: 185-195.nBucher, H. 1957. Die Tertiärlamelle von Holzfasern und ihre Erscheinungsformen bei Coniferen. Holzforschung, 11: 1-16.nFengel, D. 1966. Entwicklung und Ultrastrucktur der Pinaceen-Hoftüpfel. Svensk Papperstid., 69: 232-241.nFrey-Wyssling, A., H. H. Bosshard, and K. Mühlethaler. 1956. Die Submikroskopische Entwicklung der Hoftüpfel. Planta, 47: 115-126.nHarada, H., and W. A. Côté, Jr. 1967. Cell wall organization in the pit border region of softwood tracheids. Holzforschung, 21: 81-85.nJutte, S. M., and B. F. Spit. 1963. The sub-microscopic structure of bordered pits on the radial walls of tracheids in Parana pine, Kauri, and European spruce. Holzforschung, 17: 168-175.nKarnovsky, M. J. 1965. A formaldehyde-glutaraldehyde fixative of high osmolality for use in electron microscopy. J. Cell Biol., 27: 137A-138A.nLiese, W. 1965. The fine structure of bordered pits in softwoods, p. 271-388. In W. A. Côté, Jr. [ed.], Cellular ultrastructure of woody plants. Syracuse Univ. Press.nMollenhauer, H. H. 1964. Plastic embedding mixtures for use in electron microscopy. Stain Tech., 39: 111-114.nTrendelenburg, R. 1939. Das Holz als Rohstoff. J. F. Lehmanns, Verlag, Berlin.nWarddrop, A. B. 1965. Cellular differentiation in xylem. In W. A. Côté, Jr. [ed.], Cellular ultrastructure of woody plants. Syracuse Univ. Press, pp. 61-97.nWarddrop, A. B., and H. E. Dadswell. 1957. Variations in the cell wall organization of tracheids and fibers. Holzforschung, 11: 33-41.nWarddrop, A. B., and G. W. Davies. 1961. Morphological factors relating to the penetration of liquids into wood. Holzforschung, 15: 129-141.n






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