UKTC Archive

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

Subject: Re: Rhizomorphs do not show intelligence..........
From: Charles Bennett
Date: Nov 19 2020 14:29:24
https://en.m.wikipedia.org/wiki/Armillaria_ostoyae

On Thu, 19 Nov 2020, 08:27 Jim Quaife, <jq@xxxxxxxxxxxxxxxxx.co.uk> wrote:

I don't think that rhizomorphs are necessarily negatively geotropic and if
the host medium is "attractive" they'll exploit it.
Sapwood is soft and has a higher carbohydrate content, and decay organisms
benefit from it and rhizomorphs can prevail for many years.
Isn't there a honey fungus in the States somewhere that covers a few
square miles?  (Must look it up sometime)
Jim

-----Original Message-----
From: uktc-request@xxxxxx.tree-care.info [mailto:
uktc-request@xxxxxx.tree-care.info] On Behalf Of Rupert Baker
Sent: 18 November 2020 22:22
To: UK Tree Care
Subject: Rhizomorphs do not show intelligence..........

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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