For the first time, plants such as tomatoes and tobacco are shown to make sounds under pressure.

Since Darwin's time, people have studied plants' ability to perceive the outside world as a vehicle, and have recognized that plants, while not moving, are by no means dull.
however, previous studies have focused on perception and the transmission of organic compounds and photoelectric signals, and the study of plants transmitting information through sound waves has been rarely reported, and it is generally accepted that the plant kingdom is almost silent.
However, a recent study by the likes of Ay Kait and Owen Lewin Epstein of Tel Aviv University in Israel has for the first time demonstrated that plants make remotely detectable and informative sounds under pressure, a finding that could change traditional perceptions of the "silent" plant kingdom.
has not previously detected that the sound sound of plants is essentially a wave, transmitted through the air, to the human ear to trigger the eardrum vibration.
the size of the sound is actually a reflection of this vibrational intensity.
the lowest frequency that a human ear can hear is about 20 Hz and the highest frequency is about 20,000 Hz, a common and more accepted theoretical value that can only be used by a few tools beyond this range.
and some animals, such as dogs and cats, can hear subtle sounds that humans can't hear.
previous studies have shown that when plants are exposed to arid or harmful insects and herbivores, they exhibit phenotype changes, such as changes in color, smell and shape.
the volatile organic compounds (VOCs) they emit also affect nearby plants, resulting in increased resistance.
in general, plants have been shown to produce visual, chemical and tactile signals that other plants and animals can sometimes respond to.
However, the situation in which plants make sounds under stress has not been fully studied.
in the face of different pressure plants "call" also different long-term plant science and food security research, E. Kait and Owen Levin Eiperfstein and others, both tomato and tobacco plants are placed in a sound proof box, 10 cm away from the plant placed to receive 20 to 100 kHz of ultrasonic microphones, and recorded tomatoes and tobacco in drought, cutting leaves, cutting stems and irrigation and other different conditions of the sound.
found that plants made significantly more sounds under drought stress and cut and violated than plants in normal control groups.
the sound of plants when irrigation is scarce, and over the next four to six days, as the drought increases, the number of sounds per day increases, and then decreases as the plants wither and dry.
researchers found that these plants make different intensity sounds when exposed to different stressors.
when tobacco plants are squeezed to dry water, they make a louder sound than when the stem is cut off.
, in the absence of direct environmental threats or damage, plants emit ultrasounds, but less. According to the results of the
, when cutting off the stem of the plant, the tomato will make 25 ultrasonic "rescue" sounds in an hour, and tobacco will make 15 sounds that may symbolize "pain".
and drained, tomatoes make more noise, 35 times an hour, while tobacco makes 11 sounds.
research project also reported for the first time that plant sounds in the 20 to 100 kHz ultrasound range can be felt by hearing-sharp animals such as mice and moths within a distance of 3 to 5 meters.
some organisms can hear and react to plants, the study is currently published in bioRxiv, a bio-preprinted website, and although it has not yet been published in the journal and has been reviewed and certified by peers, the researchers believe the study will promote a scientific understanding of plant evolution and ecology around the world.
in a preliminary study, they also successfully recorded sounds from different groups of plants, such as hedgehogs and phoenix saffrons.
they expect many plants to have the ability to make sounds, but the exact characteristics of these sounds and similarities between groups have yet to be determined.
future studies could explore the sounds of plants in different states, including disease, cold, herbivorous attacks, or other stresses such as extreme ultraviolet radiation, as well as flowering, resulting and other stages of life. once
has built a large plant sound library, it can be analyzed with modern tools to gain more awareness.
E. Kait et al. also suggest that the mechanism produced by plant sounds may be cavitation, the formation and explosion of bubbles in the wood.
regardless of the mechanism by which they are produced, these sounds carry information and can be detected by other organisms.
" research has shown that machine learning algorithms can effectively classify plant sounds.
, other organisms may have evolved the ability to classify and react to these sounds.
" E. Kait et al. for example, tomatoes and tobacco are the hosts of moth larvae, moths that can hear and respond to the frequency and intensity recorded in the experiment, and that these tweezers avoid laying eggs on plants that make pressure sounds.
they hypothesize that other predators may also use the state of the plant son itself for their own benefit, for example, if the plant makes a sound about the caterpillar attack, and the bat and other predators can use these sounds to detect the attacked plant and prey on the caterpillar to help the plant, while nearby plants may also hear information about other plants being stressed or injured by drought and react to reduced evaporation.
perhaps, in the future, after further study, a new way of plant signal transmission may be white, by which time, people and plants to achieve "dialogue" or may not be a dream.
Source: Science and Technology Daily Zhao Hanbin.