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Do you believe a rose plant says "I want some water" or a tree shouts "My arms hurt"? Maybe you will say this could only happen in some stories.
In fact, plants are not always . A recent study has found plants shout when they are in need of water or having their stems cut. "Even in a quiet field, there are
some sounds that carry information. However, the pitch (音高) is too high for people ," said Lilach Hadany, a professor from Tel Aviv University.
The researchers used microphones to record some tomato plants and found that stressed plants send out sounds than unstressed plants. "When tomatoes are not stressed at all, they are very quiet," Professor Hadany said. They also trained a machine in the differences between thirsty plants and cut plants. The result shows that when the causes of stress change, they shout . After the team recorded many kinds of other plants, they found that many plants like corn, wheat and grape plants send out sounds when they are under stress, too.
"There is a that a lot of communication is happening," Professor Hadany said. "Because other plants can probably hear the call of the stressed plants."
Sound recordings of plants could bring humans lots of , especially in farming. For example, people will make sure whether corn is getting enough water or where water is needed most without much .
