Permeability Changes Induced in Three Western Conifers by Selective Bacterial Inoculation

Authors

  • Bruce R. Johnson

Keywords:

Tsuga heterophylla, Abies grandis, Pseudotsuga menziesii, permeability, bacteria, Bacillus polymyxa, sapwood, bordered pit membranes, torus

Abstract

The longitudinal gas permeability and impregnability with paraffin oil of western hemlock, grand fir, and Douglas-fir sapwood markedly increased after exposure to bacteria. Heartwood was not affected. Bacillus polymyxa was more effective in increasing gas permeability than any other single or mixed culture tested. Scanning electron microscopy suggested that this was largely due to degradation of bordered pit membranes.

References

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Published

2007-06-28

Issue

Number 1 / Spring 1979

Section

Research Contributions

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