UKTC Archive

RE: Ganoderma applanatum/australe on n.maple - implications

Subject: RE: Ganoderma applanatum/australe on n.maple - implications
From: Viper Snake
Date: Dec 28 2011 21:44:29

Hi Luke & Rupert,
I agree, I have been monitoring this on a number of trees on varying sites. 
It appears to be completely compartmentalised until the tree becomes stressed 
and then it can appear to extend bark lesions and fruit on bark that has 
recently died. I spoke to David Rose about this about ten years ago and, if I 
remember correctly, at that time he considered it to mainly a saprotropth 
that may be able to act as a weak pathogen.
Re the last par. of Gerrit's post:
An observation re Kretzschmeria - I have seen it behave as a saprotroph on 
old basal wounds on beech, in a stable relationship with actively growing 
trees over periods of more than a decade; implying that it too may be 
triggered into aggressive growth following trauma - root damage/loss, 
pruning, wind-rock etc.
And a final question : is Kretzschmaria deusta an exceptional case, because 
it starts out from the heart wood as a saprotroph, changes to a parasitic 
mode once the mycelium has invaded the cambium and returns to being a 
saprotroph once the tree has died ?
I have assessed and documented several hundreds of trees affected by K. 
deusta, which in The Netherlands is mainly found on Fagus and Tilia, but also 
on nine other deciduous tree species, and the three stage strategy of K. 
deusta I described before is the most common in my experience, although I 
also have found K. deusta fruiting as a saprotroph from dead heart wood 
inside a deep cavity on a beech and fruiting as a primairy parasite from the 
cambium while very superficially decomposing sapwood at 2 to 6 metres height 
on a beech.
Happy New Year to both of you too,

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