The Hindu
Communication: The role of sound in plants is yet to be fully explored. Photo: Nagara Gopal
It was established that young roots of corn made regular clicking sounds.
When South African botanist Lyall Watson claimed in his 1973 best-seller
“Supernature” that plants had emotions that could register on a lie
detector, scientists scoffed and branded it as hippie nonsense.
But a new Australian research at The University of Western Australia has
claimed to have discovered that plants appear to react to sounds and
may even make clicking noises to communicate with each other.
Monica Gagliano of UWA has teamed with colleagues Daniel Robert at the
University of Bristol (UK) and Stefano Mancuso at the University of
Florence (Italy) to show that the roots of young plants emit and react
to particular sounds.
“Everyone knows that plants react to light, and scientists also know
that plants use volatile chemicals to communicate with each other, for
instance, when danger — such as a herbivore — approaches,” Gagliano said
in an university statement released recently.
Gagliano and fellow researchers established that young roots of corn made regular clicking sounds.
They also found that young corn roots suspended in water leaned toward
the source of a continuous sound emitted in the region of 220Hz, which
is within the frequency range that the same roots emitted themselves.
Their findings, published in the leading international journal Trends in Plant Science,
conclude that the role of sound in plants has yet to be fully explored,
“leaving serious gaps our current understanding of the sensory and
communicatory complexity of these organisms.”
In addition to other forms of sensory response, “it is very likely that
some form of sensitivity to sound and vibrations also plays an important
role in the life of plants”. Gagliano said.
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