Plants can now tell you when they're stressed out

Anyone who has tried to keep porch plants or a home garden alive through seasonal changes knows it's a task easier said than done. Abrupt temperature changes--like cold snaps--and prolonged periods of drought can stress plants, disrupting their normal biochemistry. If not addressed quickly enough, those stresses can eventually kill the plant. Disappointed growers often only see the tell-tale signs (like shriveling or browning leaves) after it's too late. But a new plant-wearable device developed by researchers at the American Chemical Society could offer an early warning system. The wearable, detailed this week in the journal ACS Sensors, comes in the form of an electromagnetic sensor attached directly to plant leaves.