EMAIL ALERTS FROM PLANTS. “MIT engineers recently accomplished this, allowing a spinach plant to send an email to a smartphone when it encountered nitroaromatics—chemical compounds found in many types of explosives. The plants roots picked up this compound, which was sent to the leaves, where nanotube sensors triggered a signal.”
http://bigthink.com/philip-perry/we-have-overcome-the-plant-animal-communication-barrier-mit-professor-claims