I would imagine that the uprooted tree would also have the DNA of whoever it was that was buried under the tree.
Ummm, plants do not pick up or replicate the DNA of dead animals or humans their roots sink into... If that were the case, we'd have all these hybrid plant/animals, plant/humans around.
DNA in dead flesh deteriorates very quickly. The only places DNA can be found in skeletons is possibly in the bone marrow--but even that goes away fairly quickly. I can guarantee that the DNA in 200+ year old bones in moist Connecticut soil is long gone. And like I said, it won't be picked up by plants or trees anyway.
Re: DNA
Obviously you never saw the apple trees on the Wizard Of Oz