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The effect of peridermium pini on the water conduction in pinus sylvestris



The effect of peridermium pini on the water conduction in pinus sylvestris



European Journal of Forest Pathology 7(6): 328-338



In healthy Scots pine sapwood permeability to water, bulk density and moisture content are closely related, and gas content is negligible. Wood from Peridermium lesions and their associated dry zones is impermeable to water and has a high gas content. Wood from lesion centers also exhibit high bulk density associated with high resin content. The mechanisms by which these abnormal phenomena may develop are briefly discussed in relation to Peridermium pathogenesis and that of other disorders with similar features. Physical blockage of conduction channels by gas or solid material may explain the observed loss of permeability in resinous and dry zones, but in peripheral areas low permeability occurs before any increase in gas or solid matter can be detected. The loss of conducting ability in stems with girdling lesions is probably sufficient to account for the death of the crown.

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Accession: 006650975

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