The Bordered Pit Membrane in Differentiating Balsam Fir

Authors

  • R. A. Parham
  • W. M. Baird

Keywords:

<i>Abies balsamea</i>, wood structure, electron microscopy

Abstract

Bordered pit membranes in the cambial zone of balsam fir [Abies balsamea (L.) Mill.] were studied via surface replica and transverse section. An initially solid membrane is gradually perforated at tracheid maturity to yield a peripherally permeable margo bounded by a denser annulus and centrally thickened torus. Large, radially directed microfibrils in the margo are present at an early stage of pit development and do not arise as a result of pit aspiration. Relevance of findings to recent literature and viewpoints is discussed.

References

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Published

2007-06-05

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Section

Research Contributions