Yes, I know this is a very specific question. I am interested in Aleppo pine (Pinus halepensis) but I welcome information on other non-resprouter pines. When a pine is killed by fire or logged, I suppose that the xylem sap contained in its roots degrades and dries progressively. But, how long is there available xylem sap in roots for xylem-feeding animals like cicada nymphs or other insects?
I don't have information specific for your pine, but for many pine species there are a lot of root grafting between trees and the stumps dead or cut trees can stay alive for many many years, hence carry sap for a long time. Without root grafts, we rarely see live stumps after 1-2 years.
I am not definite about ur specific pine species but generally pines do not have regenerative capacity from their stumps so their roots become dead within a year or so.
You can check our publications for Pinus banksiana (Tarroux and DesRochers). There are some for Pinus contorta (Fraser et al,)
I know there are also a few for white pine and red pine (Pinus resinosa) in the old literature (check for references in Tarroux et al).
The lifetime of pinus roots could be as long as they are supported by another living tree (if they are grafted). If they are not grafted, I don't know of any references.
By excluding Cedrus from the matK data set and rooting the tree between the next two major basal clades of the three-gene phylogeny
each species have carakter,for many pine species there are a lot of root grafting between trees and the stumps dead or cut trees can stay alive for many many years, may be carry sap for a long time. Without root grafts, I try planting live stumps
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