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Study reveals plants 'listen' to find sources of water
Key Excerpts from Article on Website of Phys Org


Phys Org, April 11, 2017
Posted: April 16th, 2017
https://phys.org/news/2017-04-reveals-sources.html

A study led by The University of Western Australia has found plants have far more complex and developed senses than we thought with the ability to detect and respond to sounds to find water, and ultimately survive. In the study "Tuned in: plant roots use sound to locate water" ... UWA researchers found that plants can sense sound vibrations from running water moving through pipes or in the soil, to help their roots move towards the source of water. The study also revealed that plants do not like certain noises and will move away from particular sounds. Lead researcher Dr Monica Gagliano ... said water was a basic need for a plant's survival, and the study showed that sound plays a significant role in helping plants cater to this need. "We used the common garden pea plant ... as the model for our study and [gave] it a choice of two directions for the growth of its roots. "We then exposed the plant to a series of sounds, including white noise, running water and then a recording of running water under each tube, and observed its behaviour. The plants could tell where the source of the water was and their root systems grew towards that source. "The plant could actually tell when the sound of running water was a recording and when it was real and that the plant did not like the recorded sound." When moisture was readily available in the soil, the plant did not respond to the sound of running water. "From this we begin to see the complexity of plant interactions with sound in using it to make behavioural decisions," Dr Gagliano said.

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