Plants "Talk"
Scientists have known for years that plants respond to sounds around them. But now scientists in Israel have shown that plants also seem to be doing some "talking".
Professor Hadany and her team at Aviv University set up microphones to r tomato plants under different situations. The result showed that the plants made ultrasonic sounds(超声波). When the researchers changed the sounds into ones that humans could hear, they heard sharp clicking noises (咔哒声).
As the scientists studied the sounds, they notice the regularity. Plants h clicked when they had enough water. But as their soil(土壤)got drier, they began to click.
When scientists cut off a stem from the plants, the plants also clicked more. But the clicking wasn't the same as when the plants needed water. The result suggests that researchers may one day be able to use a plant's sounds to find out when it is having trouble, and what trouble it is having. That could be very helpful to f .
The other research has shown that plants also make sounds to communicate in some ways. When insects a a plant, it will give a warning to its neighbours. Soon, nearby plants start to make chemicals that don't taste good to insects. It's an effective way for plants to pthemselves.
Then here is a question: Is anything listening to the plants? Dr. Hadany points out that mice who live on plants can hear the sounds. The clicks may tell them whether a plant has problems. If the plant isn't h, they will avoid it.
As Dr. Hadany says, "Even in a quiet field, there are actually sounds that we don't hear, and those sounds carry i . The team's research has already changed our ideas about plants. "
