<
https://theconversation.com/thirsty-tomatoes-emit-ultrasonic-sounds-and-other-plants-may-be-listening-204637>
"Plants may appear silent, indifferent organisms to us, but recent research has
found they make high-pitched clicking sounds when they are struggling to find
water. In principle, neighbouring plants could pick up on and react to these
noises.
Scientists in Israel record brief pulses of sound coming from tobacco and
tomato plants in a greenhouse. They happened more often when the plants had not
been watered or at times when they were losing large amounts of water from
their leaves.
The sounds were about as loud as a quiet conversation but were mostly between
40,000Hz and 60,000Hz, which is too high pitched for human hearing which only
goes up to about 20,000Hz. However, they should be audible by dogs, who can
hear up to 45,000Hz, or cats, whose hearing goes all the way up to 64,000Hz.
Although it’s nice to think plants were sending each other messages about a
water shortage through sound, this may not have been the case. Instead, the
sounds may be due to bubbles forming in the plants’ stems in a simple physical
process."
Cheers,
*** Xanni ***
--
mailto:xanni@xanadu.net Andrew Pam
http://xanadu.com.au/ Chief Scientist, Xanadu
https://glasswings.com.au/ Partner, Glass Wings
https://sericyb.com.au/ Manager, Serious Cybernetics
