Telling the difference between G. adspersum and G. applanatum?

[David Humphries]

In terms of significance, I though Lynn body did a piece of work sometime ago now that suggested adspersum/austral can break down CODIT wall 4 n hence was more aggressive, potentially.

 

This mirrors Schwarze & Ferners work where they also suggest that G. adspersum/australe has the ability to penetrate intact reaction zones between decayed & sound wood volumes and progress through the sapwood, which in essence is reducing the residual wall strength.

 

This is the reason it's important to differentiate the species when a Fb is discovered on a tree being inspected, certainly when it comes to the two similar Gano species.

 

The crux will be the vitality of the tree in question. If high, then its likely that G. applanatum can be left confined to the dysfunctinal core as its largely saprophytic. But if vitality is low then applanatum will probably lead to stability issues.

 

 

 

http://www.google.co.uk/url?url=http://arbtalk.co.uk/forum/attachments/fungi-pictures/116928d1362903479-ganoderma-enspec-20research-20paper-20-20ganoderma-20on-20trees.pdf&rct=j&frm=1&q=&esrc=s&sa=U&ei=RQMMVbzeFJDeat_3gNAE&ved=0CBQQFjAA&sig2=wJbtGuiFS8oSpo-F0h8ZeA&usg=AFQjCNEk3BqRvZglHc0o1QsvMhkGndYSsQ

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[daltontrees]

This mirrors Schwarze & Ferners work where they also suggest that G. adspersum/australe has the ability to penetrate intact reaction zones between decayed & sound wood volumes and progress through the sapwood, which in essence is reducing the residual wall strength.

 

This is the reason it's important to differentiate the species when a Fb is discovered on a tree being inspected, certainly when it comes to the two similar Gano species.

 

The crux will be the vitality of the tree in question. If high, then its likely that G. applanatum can be left confined to the dysfunctinal core as its largely saprophytic. But if vitality is low then applanatum will probably lead to stability issues.

 

 

 

http://www.google.co.uk/url?url=http://arbtalk.co.uk/forum/attachments/fungi-pictures/116928d1362903479-ganoderma-enspec-20research-20paper-20-20ganoderma-20on-20trees.pdf&rct=j&frm=1&q=&esrc=s&sa=U&ei=RQMMVbzeFJDeat_3gNAE&ved=0CBQQFjAA&sig2=wJbtGuiFS8oSpo-F0h8ZeA&usg=AFQjCNEk3BqRvZglHc0o1QsvMhkGndYSsQ

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Thanks for postingthe research paper, very interesting and as close as the OP could hope to find to an answer.

 

Among other things it's saying that applanatum is faster acting but gets stopped by polyphenolic R zones, whereas australe syn. adspersum is slower but isn't stopped. Both are able to carry on into sapwood. I suppose it makes some sort of sense that the unspecialised applanatum travels light because it is not replicating or propagating the more complex nucleotides needed to produce and secrete polyphenol solvents.

 

Caution as ever is needed, the generality can't be extended beyond Platanus, which was the host wood in the research. In passing I noted that the host list for applanatum includes ring porous genera whereas the list for australe syn. adspersum does not. I think R zone is just too wide a term to build generalities around. The zone comprises 3 'walls' but they're not really walls at all, 3 is just an obstacle course. 2 seems inherently weaker in diffuse porous structures. Etc. etc.

 

They're both a worry then, and if you can't see or infer how well the R zones have developed in the host individual it is tricky to safely say whether applamatum or australe has a worse prognosis. Slow action, too, allows for adaptive growth, perhaps rendering the hazard secure.

 

I have a site I'm reporting on just now (or would be if I wasn't procrasitinating on Arbtalk) which seems to have Ganoderma applaustralersum! I'm now going to have to go and look at it again..wibble, wibble...