Age of plants

I found a fascinating article in the Danish Wikipedia about the biology of trees. Written in a intriguing language, like this quote about defense mechanisms (my translation):

Within seconds the tree knows that it has been hurt. As soon as the bark is breached, the tree needs to defend itself. If fungus and bacteria spores find an uncovered piece of wood - and they will - they will launch an attack on the wound and into the wood.

I wonder whether it'll survive the editing process in the long run.

I was looking for information about how old plants can grow. Indoor perennial plants and flowers are commonly multiplied by division. But that doesn't reset their age. If they have one. I still don't know.