In the future, farmers might use ultrasound to listen to stressed plants vent.
Hadany and colleagues’ work is part of a niche but budding field called “plant bioacoustics.” While scientists know plants aren’t just inert decorations in the ecological backdrop— they interact with their surroundings, likeas a defense mechanism—researchers don’t exactly know how plants respond to and produce sounds. Not only could solving this mystery give farmers a new way of tending to their plants, but it might also unlock something wondrous: Plants have senses in a way we never realized.
Plants under idyllic conditions seemed to thrive. But the damaged and dehydrated plants did something peculiar: They emitted clicking sounds once every few minutes. “Not everybody has the equipment to do ultrasound [or] has the mind to look into these broader frequencies,” says ecologistThree tomato plants’ sounds were recorded in a greenhouse.The researchers were able to record similar sounds in other plants deprived of water, including wheat, maize, wine grapes, pincushion cactus, and henbit .
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