They were not silent, we just needed to listen carefully. Like humans, plants also make sounds to express their displeasure. An alarming murmur corresponding to the type of stress these plants are subjected to. “One would think that at least a mouth is required for the spread of complaints. But recent studies of the plant kingdom show that a mouth is not necessary.”Write The newspaper “New York Timeswhich retransmits this work published this Thursday, March 30 in the journal Cell. Enough to highlight the amazing sophistication of our plant friends.
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Biologist Lilah Hadani of Tel Aviv University in Israel found that plants that need water or have recently cut stems make up to thirty-five sounds per hour, while well-moistened, unpruned plants are much quieter. producing only about one sound per hour. The scientist speculates that these groans (listen by clicking here) may be due to something called cavitation, where tiny bubbles burst and produce mini-shock waves inside the plant’s vascular system.
Plants were already known to communicate with each other by releasing chemicals known as volatiles. They are also known to interact with other organisms that constantly make sounds, such as the buzzing of bees. However, this is the first case of research into the fact that plants themselves make sounds for the purpose of transmitting information. An artificial intelligence program could determine with 70% accuracy whether a grumpy plant is thirsty or in danger of decapitation, the researcher suggests in his report.
Noise noticeable by some animals
To come to this conclusion, the researcher and her team tapped the plants, placing them in soundproof wooden boxes, pointing two microphones at their stems. Lilah Hadani indicates that she decided to use tomato plants for the purposes of the experiment (Solanum Lycopersicum) and tobacco (Nicotiana tabacum) because they are easy to grow and their genetics are well known. Unfortunately, the sounds made by plants remain inaudible to humans because they are too high pitched, she explains. The team had to transform them so that we could hear them.
On the other hand, these noises are perceived by some animals such as mice and moths. Now the question is whether other plants could listen to the complaints of their neighbors. In 2019, a study by a group of biologists found that some flowers produce more nectar in response to the sound of pollinators. Without going so far as to say that plants are endowed with some form of intelligence, we now know that they are much more talkative than previously thought.
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