A recent study done by a group of scientists at the Tel Aviv University has discovered that some plants will scream in a high frequency when they are undergoing stress.
The research was carried out on tomato plants and tobacco plants by cutting their stems and depriving them of water. A microphone is placed 10cm away from the setup.
When they started cutting the stems, they found out that the plants started ’screaming’ between 20 and 100 kilohertz and they believe that this scream is probably meant to warn other plants and organisms nearby.
When the tomato plant’s stem was cut, 25 ultrasonic distress sounds were recorded over the course of an hour, and on the other hand, 15 ultrasonic distress sounds were recorded from the tobacco plant.
When they deprived the plants of water, the tomato plants recorded even more distress sounds with 35 distress sounds in an hour while the tobacco plants recorded about 11 distress sounds.
deprive：動詞，剝奪。例句：He claimed that he had been deprived of his freedom.（他宣稱被剝奪自由。）
be meant to︰動詞片語，應該。例句︰You were meant to ask me why I disappointed with the idea.（你該問問我對這想法為何感到失望。）
organism：名詞，生物體；有機體；微生物。例句：Amoebae and bacteria are single-celled organisms. （變形蟲和細菌是單細胞生物。