On guard: Sentinel plants could warn of bioterror
U.S. soldiers walk down a trail in a war zone. One of them pulls out a hand-held electronic device and points it at a native plant. The readings on the device indicate the plant was exposed to nerve gas sometime in the last 48 hours, allowing the soldiers to don protective gear before they suffer a lethal dose. Although such a device does not exist, it’s not as far-fetched as it may sound. As concerns grow over the threat of bioterrorism and weapons of mass destruction, university researchers are working on an early warning system — the figurative canary in the mineshaft — that could be as unobtrusive and ubiquitous as plants in a landscape.