Quote:
Originally Posted by fosheezy  -tree is wounded.
-instead of putting another layer of unprotected xylem on the inside a heavily suberised layer of cells are laid down (suberin is the same waterproof and inpenatrable substance in bark that stops infection from the outside).
-bam, barrier zone is laid down and cambium goes back to producing xylem. |
There was a document with pictures that showed what is layed down is a bunch of cells that then change to the various components, but the inner cells against the wound are similar to what you say. So imagine a wad of cells 10 deep for example are laid down, the inner couple become the wall, the middle the xylem/phloem etc and the outside periderm.
So I dont think that the cells laid down are suberized but normal then converted to suberized ... documentation suggest that.... but you are most welcome to add any reference to this as you can, best is microscope evidence etc from reputable places like uni's etc.
I was researching decay colonization after wounding gymnosperms vs angiosperms the other day and that dug up some interesting similar stuff too. Gymnosperms are actually superior in their defence to decay due to the volume of tracheids they have over angiosperms.