UKTC Archive

Re: Rhizomorphs do not show intelligence..........

Subject: Re: Rhizomorphs do not show intelligence..........
From: Andrea Maistrello
Date: Nov 18 2020 23:14:47
Hi Rupert
Similar scenario found on a dead walnut.
The tree has been dead for at least 10 years and it was felled last week.
It was interesting to find out  that all the organism have colonised only
the sap wood as the heartwood was still solid as marble. Maybe for its
opportunistic nature the armillaria once the tree was dead has switched
back to saprophytic mode as it was easy to break down the dead sapwood....
Andrea


On Wed, Nov 18, 2020, 22:22 Rupert Baker <rupert_baker@xxxxxxxx.co.uk> wrote:

Found 10m up a (very recently fallen) dead oak tree had been dead for
years;
upper branches with undecayed heartwood, and balsa-wood strength (or
weaker)
decayed sapwood - dead upper canopy branches, under the bark, intricately
laced with Armillaria rhizomorphs; tree had only been about 15m tall, max.
I
suppose they just follow gradients of humidity and moisture/chemical
signals
from plants, and I know that there is a whole range of strategies from
full-on pathogen to saprophyte; but I do wonder what is the evolutionary
advantage of climbing a tree whose sapwood would probably already have been
colonised by the same clone of the fungus..



Atb

Rupert




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