The research team used microphones to record the sounds of healthy and stressed tomato and tobacco plants in a soundproof room and a noisy greenhouse environment. They found that stressed plants made more sounds than unstressed plants, and the frequency of the sounds varied depending on the cause of the stress. Voices could be heard from more than a meter away.
Researchers think these sounds may be caused by the formation and bursting of air bubbles in the plant’s vascular system. The study also showed that plants under “water” stress began making noises even before they were visibly dehydrated.
The findings could have implications for agriculture, as farmers can use sound to detect stress in plants before visible symptoms appear.
Source: Ferra
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