callus and woundwood

[Patchwork]

Ok so iv been reading up about callus and woundwood, just as a basic understanding. but now have got way to into it. Some things im finding hard to understand, ill give you a overview of what i think happens please correct me on places i go wrong.

When a tree is wounded it creats walls 1 2 and 3. at the edges of the wound where living tissue meets dead tissue, the pressure is released on the living cells which then start to divide. This is known as callus. as the cells divide more and more taking up room they start to specifically form unordered fibers and vessels, the avaliable chemicals in these vessels and fibers start to become tough lignin, creating woundwood. Wound wood is the wood that exists above the wound of the tree. the question i have is while the tree is creating more tissue to cover the wound, is the advancing tissue callus? and as it moves on the callus becomes woundwood? is woundwood the thing that dose the actual growing or is that callus?

[Patchwork]

or is callus only function to trigger the growth of woundwood? the woundwood is what actually starts to cover and eventually close wounds?

[Bundle 2]

Quite apart from the fact that you are way too into it mate...there are differences between woundwood and callus and these are only determined scientifically...As I recall, they are identified in the way you outline but beyond that, most cells are predetermined in the sense that they will only ever perform a specific function in the plants life...it is written into the "dna ".....the differences you question are fundamental to the plants creation of woundwood from cells that do not " differentiate"... thoroughly logical when you consider that a tree for example can never know where they are required ( ie where they will get damaged ) so the solution is to keep their options open...****kin' smart n'est pas?

[Bundle 2]

Oh and think about the BBr and the predisposed programming of cells in plant function lifecycle....they are most carefully either present or not......( suddenly feel the need to say woody plants...treees!!! ) lol

[Patchwork]

ok so when looking at a tree that is recovering from a wound, u can say "this is callus and this is woundwood" to be specific you would have to look at the cells structured within the tissue? so what is the easy way round it? to just call the new growth over a wound, woundwood?

[Bundle 2]

I think you can say of callus that it is identified because of where it occurs. Remove at the BBR and the wound will form callus to seal ( we say seal, not heal....) but when mechanical damage appears elsewhere, low on the stem for example, you will /can differentiate between the classifications of the woods. Importantly, we are not trying to point out differences in the wood but only in the way the plant biology is designed to produce the wood. It is the simplicity of the cells that do not differentiate that allows them to be more versatile in their ultimate employment by the tree (the use to which they can be put. ) This is in a large part how we come to describe trees as "dynamic " and also " living"

[Patchwork]

yeah i understand the basics of CODIT and the "trees dont heal they seal" principle put foward by Shigo. but i just am finding it hard when looking deeply into the callus/woundwood diffrence. i understand how their structure is diffrent but i would like to be able to tell a visual diffrence. so the meristematic cells in the symplast are almost like stem cells in mammels, they can become any specific cellular structure in the plant? also about removing branches at the collar and BBR, surley callus is what starts the process of sealing a wound, but then it develops into woundwood, i thought the same was true for any sealing of a wound on a tree. the way i see it is callus is the trigger of woundwood forming, the match to the fuse so to speak.

[Bundle 2]

yeah i understand the basics of CODIT and the "trees dont heal they seal" principle put foward by Shigo. but i just am finding it hard when looking deeply into the callus/woundwood diffrence.

i would like to be able to tell a visual diffrence. .

the way i see it is callus is the trigger of woundwood forming, the match to the fuse so to speak.

 

I know what you are saying ....You have answered your own question.......

[Bundle 2]

Check this out....

 

http://www.treedictionary.com/DICT2003/boonites/callus/index.html

 

http://www.treedictionary.com/DICT2003/boonites/callus/woundwood%20and%20callus-1.html

 

I hope this helps

[Bundle 2]

Just to be a real PITA if you cut at the bbr but miss the "G" spot for arguments sake..watch the plants response. It will be species specific but almost unable to seal the wound at that place that the bbr was not considered to be present. This must surely point to the status of the cells at the bbr and crucially those just a quite small distance from it...Some cells it seems are designed to become woundwood and can achieve this better than the cells which are not. However, when you read this in context to Shigos findings, they would all need to be the same by definition.....

A complex issue worthy of consideration . I find I have to read the stuff several times to pin point the facts and eek out the meaning and order as it was intended.