I don’t know. The berries are near black and quite tasty. If you can get them before a flock of birds gets to them. Roots or not, i wouldn't want them anywhere near the house or cars
I'm happy to eat the red or white mulberries.
Used to pick 'em along the tracks in NJ when I was a kid.
That was the good thing about having the branches up against the house - easy to pick. LOL