"In the lab version, as the animal's teeth ripped the sage leaves, scientists watched the sage plant send a chemical signal into the air, and watched as a nearby tobacco plant picked up the signal and then emitted an odor that was noxious to the animal — strong
enough to repel the antelope — protecting itself, and, arguably, helping the sage."
This is very interesting! Perhaps with the right combination of plants we could build a chain reaction garden defense system!