Journal of Plant Research

, Volume 106, Issue 2, pp 137–142 | Cite as

Xylem changes in the correlative inhibition of lateral bud growth in flax (Linum usitatissimum L.)

  • Manjarabad V. S. Raju
  • William N. Marchuk


Xylem or tracheary changes at the base of the cotyledonary buds of flax seedlings (Linum usitatissimum L.), released from inhibition by decapitation of the main apex were studied. The differentiation of xylem strands and/or tracheary elements was correlated with the growth in length of the lateral buds, especially 48–72 hr after the removal of the main apex. The xylem strands, connected to the hypocotylary stele or not, and the tracheary elements increased with age within and outside the strands of both non-decapitated and decapitated seedlings. In the latter, the differentiation of these structures, however, occurred much earlier and in greater abundance in the same regions. The early growth in length of lateral buds, 1 or 2 hr after decapitation, was correlated with the early development of tracheary perforations in the xylem strands. The xylary strands with perforated elements are known to be more efficient than those without them. Therefore, it is suggested that the inhibition of lateral-bud growth was due, in fact, to a lack of appropriate tracheary perforations in the bud xylem strands that were connected with the hypocotylary stele of flax seedlings.

Key words

Apical dominance Flax Linum Xylem changes 


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  1. Ali, A. andFletcher, R.A. 1970. Xylem differentiation in inhibited buds of soybeans. Can. J. Bot.48: 1139–1140.Google Scholar
  2. Cline, M.G. 1991. Apical dominance. Bot. Rev.57: 318–358.Google Scholar
  3. Gregory, F.G. andVeale, J.A. 1957. A reassessment of the problem of apical dominance. Symp. Soc. Expt. Biol.11: 1–20.Google Scholar
  4. Guern, J. andUsciati, M. 1972. The present status of the problem of apical dominance.In H. Kaldewey and Y. Vardar, ed., Hormonal Regulation in Plant Growth and Development. Verlag Chemie, Weinheim. pp. 383–400.Google Scholar
  5. Jensen, W.A. 1962. Botanical Histochemistry. W.H. Freeman and Company, San Francisco.Google Scholar
  6. Johansen, D.A. 1940. Plant Microtechnique. McGraw-Hill, New York.Google Scholar
  7. Lyndon, R.F. 1990. Plant Development-The Cellular Basis. Unwin Hyman, London.Google Scholar
  8. Marchuk, W.N. andRaju, M.V.S. 1978. Some anatomical changes in the cotyledonary node in relation to correlative inhibition of the lateral shoot growth in flax. Bot. Gaz.139: 69–80.CrossRefGoogle Scholar
  9. Mclntyre, G.I. 1977. The role of nutrition in apical dominance.In D.H. Jennings, ed., Integration of Activity in the Higher Plant, Symp. Soc. Exptl. Biol. Cambridge University Press, Cambridge. pp. 251–275.Google Scholar
  10. Mclntyre, G.I. 1987. The role of water in the regulation of plant development. Can. J. Bot.65: 1287–1298.Google Scholar
  11. Peterson, C.A. andFletcher, R.A. 1973. Apical dominance is not due to a lack of functional xylem and phloem in inhibited buds. J. Exptl. Bot.24: 97–103.Google Scholar
  12. Phillips, I.D.J. 1975. Apical Dominance. Annu. Rev. Plant Physiol.26: 341–367.CrossRefGoogle Scholar
  13. Raju, M.V.S. 1980. Xylogenesis in relation to apical dominance.In K. Periasamy, ed., Histochemistry, Developmental and Structural Anatomy of Angiosperms: A symposium. P and B. Publications, Tiruchirapalli. pp. 184–196.Google Scholar
  14. Raju, M.V.S., Marchuk, W.N. andPolowick, P.L. 1978. Surgical studies on growth and xylem differentiation in the cotyledonary shoots of flax. Can. J. Bot.56: 476–482.Google Scholar
  15. Roberts, L.W. 1976. Cytodifferentiation in Plants. Cambridge University Press, Cambridge.Google Scholar
  16. Rubinstein, B. andNagao, M.A. 1976. Lateral bud growth and its control by the apex. Bot. Rev.42: 83–113.Google Scholar
  17. Sachs, T. 1970. A control of bud growth by vascular differentiation. Israel J. Bot.19: 484–498.Google Scholar
  18. Sachs, T. 1991. Pattern Formation in Plant Tissues. Cambridge University Press, Cambridge.Google Scholar
  19. Sorokin, H.P. andThimann, K.V. 1964. The histological basis of inhibition of axillary buds inPisum sativum and the effect of auxins and kinetin on xylem development. Protoplasma59: 326–350.CrossRefGoogle Scholar
  20. Steeves, T.A. andSussex, I.M. 1989. Patterns in Plant Development. Cambridge University Press, Cambridge.Google Scholar
  21. Wetmore, R.H. andRier, J.P. 1963. Experimental induction of vascular tissues in callus of angiosperms. Amer. J. Bot.50: 418–430.Google Scholar

Copyright information

© The Botanical Society of Japan 1993

Authors and Affiliations

  • Manjarabad V. S. Raju
    • 1
  • William N. Marchuk
    • 2
  1. 1.Biology DepartmentUniversity of ReginaReginaCanada
  2. 2.Biology DepartmentRed Deer CollegeRed DeerCanada

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