Authors: Hintikka, Veikko
Journal: Karstenia, Volume 13 (1973), pages 5-8.
Doi: https://doi.org/10.29203/ka.1973.76
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Abstract: Suspensions of Armillariella spores were forced through fresh cross sections of wood at a maximum pressure of 0.05 atm. Great variations in the degree of spore penetration were found between different tree species. The wood of ring-porous species allowed the spores to flow readily through 16 em thick pieces; in diffuse- pored trees the penetration as considerably smaller, and a 1 em thick piece of conifer wood completely filtered off all the fungus spores. It is concluded that the anatomical structure of wood, in connection with physical phenomena at the wood surface (capillary action, changes in temperature and air pressure, rain splash), may be responsible for differences in the infection process of wood of different tree species.