Good point! Grafted plants with top half from "Harry" have roots from "George". T he root fungi must communicate with George. Maybe the question is: "Can Harry tell George that aphids are biting Harry?"
One thin g that must help is that (I think, I guess) that the species and variety of root fungi that associate with plants prob ably is pretty constant through the whole species - probably,. maybe. Thus Harry and Gedorge would BOTH be used to communicating with the same varieties of root fungi.
It would be really cool if they could discover different "dialects" of root / root fun gi communication!
