JERUSALEM
\nThe secret language of plants has been unlocked by a group of Israeli researchers in the George S. Wise Faculty of Life Sciences at Israel\u2019s Tel Aviv University.
\nAccording to an article published in the scientific journal Cell, plants usually emit more sounds when they are under stress. The click-like sounds are imperceptible to human ears, but can probably be heard by other plants and animals.
\nThis is believed the first time that airborne sounds from stressed plants have been classified and recorded at a distance.
\nWalking into the lab, two ultrasonic microphones for gathering the sounds of plants are placed in front of a tomato pot. Lilach Hadany, a leading researcher and professor at the School of Plant Sciences and Food Security, said that this special equipment is mainly implemented in the study of ultrasonic signals of bats.
\nThe microphones, able to record sounds at frequencies of 20-250 kHz, are put 10 cm away from the plant to avoid interference. With the help of the built-in sensors in the microphones, ultrasonic signals can be converted into electrical signals that are easily recognized by humans.
\n\u201cDa…da…da…\u201d It turns out that plants \u201ctalk\u201d in clicks. The popping sounds are emitted at high frequencies of around 60 kHz, according to Hadany, beyond the maximum frequency detected by a human adult, which is 16 kHz.
\nIt is believed that the sounds might be connected to cavitation in the stem, and the process of cavitation is producing vibrations that people can detect with the sensors, Hadany told Xinhua.
\n\u201cWhen a plant is under stress, air bubbles can form, expand and collapse in the xylem,\u201d reported the Times of Israel.
\nThe study focused mainly on tomato and tobacco plants, but wheat, corn, cactus, henbit and other plants were also recorded.
\nA statement released by Tel Aviv University elaborated on the process of the experiments: at the first stage, the researchers placed plants in an acoustic box in a quiet, isolated basement with no background noise. Before placing the plants in the acoustic box researchers subjected them to various treatments — some had not been watered for five days, in some the stem had been cut, and some were untouched.
\nThen the recordings collected were analyzed by specially developed machine learning (AI) algorithms. \u201cThe algorithms learned how to distinguish between different plants and types of sounds, and were ultimately able to identify the plant and determine the type and level of stress from the recordings,\u201d read the statement.
\n\u201cOur recordings indicated that the plants in our experiment emitted sounds at frequencies of 40-80 kHz, and unstressed plants emitted less than one sound per hour on average, while the stressed plants — both dehydrated and injured — emitted dozens of sounds every hour,\u201d she added.
\nResearchers believe plants suffering from different injuries may produce different kinds of informative sounds. Experiments have proved that, according to Hadany, sounds of tomato plants infected with cucumber mosaic virus are also successfully separated. <\/p>\n","protected":false},"excerpt":{"rendered":"
JERUSALEM The secret language of plants has been unlocked by a group of Israeli researchers in the George S. Wise Faculty of Life Sciences at Israel\u2019s Tel Aviv University. According to an article published in the scientific journal Cell, plants usually emit more sounds when they are under stress. The click-like sounds are imperceptible to […]<\/p>\n","protected":false},"author":2,"featured_media":329406,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":{"0":"post-329388","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-world"},"yoast_head":"\n