SOME EFFECTS OF MICROFLORAS IN DECAY-FREE HEARTWOOD OF ABIES LASIOCARPA (HOOK.) NUTT. ON THE GROWTH OF STEREUM SANGUINOLENTUM ALB. AND SCHW. EX FRIES

Publisher Website
Google Scholar
Abstract
Microorganisms occurred in samples of decay-free heartwood from a living Alpine fir. Mycelial growth of Stereum sanguinolentum was partially inhibited when inoculations were made on untreated samples of heartwood or in plates of dry heat (oven-sterilized) sawdust containing the untreated parts of aqueous suspensions from heartwood tissues. Inhibition was not observed in inoculations on oven-sterilized samples of heartwood or in plates of oven-sterilized sawdust containing the Millipore-filtered or autoclaved parts of the suspensions. It appeared that the success or failure of S. sanguinolentum to colonize the test substrates may have been due in part to microbiological factors in untreated heartwood.The fungus successfully colonized oven-sterilized samples of heartwood at all water contents investigated (51–171%, dry weight basis). However, greater inhibition of S. sanguinolentum was observed in untreated samples at higher water contents (131–187% dry weight basis). The results suggested that wetter microenvironments involving the interactional phenomena between heartwood tissues and associated microorganisms may have been most effective in preventing the growth of S. sanguinolentum.