IT COVERS PLANT COMMUNICATION AND TRACES DEVELOPMENTS FROM SIR JCBOSE ONWARDS TILL DATE AND PRESENTS PLANT TALK IN A STYLE DIFFERENT FROM THE USUAL ONE SITING EXAMPLES AND POSING QUESTIONS .

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Plant Communication
ncbi.nlm.nih.gov
Plantscientist.wordpress.com

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The other day
When I chanced to read about Plant talk !
Wow!
I could not believe my eyes
But right there the words were staring at me
In black and white
Some said
they whisper ,some said they chatter
others said they gossip !
Yet others
were sure they indulge in serious communication
with each other ,with neighbors ,with kins & others
My curiosity
new no bounds and impelled me to enquire
after all how they do so ,why they do so?
And found
Surprisingly they use more than one ways
talking mainly , in the language of chemistry
using each compound as a word
and joining such ‘words’ to make sentences !

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as per Jarmo H of finland .
But
from time to time ? or always ?
by catching cues? or signaling ways?
They say
Plants do so
by spreading aroma
of Volatile Organic Compounds
as signals! through air
By exchanging materials
through Common mycelial net work
of arbuscular mycorrhizal fungi
or via roots through soil pathways
By transmitting messages
via signals sent through
Common Mycelial Net work
For
It was observed that

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when one plant is wounded
by herbivore aphids
it emits VOC’s which act as signals
alerting neighbours
who respond immediately
by tightening defenses,
emitting VOC’s which repel aphids
and attract their enemy wasps.
Z. Babikova, of Scotland observed
it in Broad beans
and found aerial as well as underground
mycorrhizal Routes are used by them to
warn neighbours.
But
Is it deliberate ! if so ,social sense !Yaw !
What a strategy ! awesome –yes!
It was
Experimentally seen that
Nutrients and other compounds
actually move between trees

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through underground channels
including CMN and soil pathways
as observed by Philip et al .
It was
Also observed by Ariel N of Israel
that drought stressed garden peas
closing their stomata send signals
via roots to neighbours
who immediately respond by
similarly closing their stomata.
Not only that
The information is relayed
to plants farther away
which also take promptly
precautionary measures.
To some
It appeared to be a case of
eaves dropping rather than
intentional relay
It was

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Also seen that plants recognize
kith & kin and distinguish them
from others via chemicals
emitted or received .
and adjust suitably their behavior
R.Karban etal of California actually found
Airborn communication more effective
interse amongst Sagebush kins
In
Case of Tomato plants
suffering from leaf blight
also ,the warning issued
through MCN prompts
healthy neighbours to become
more disease resistant .
as reported by china’s scientists
In case
Of carnivores like Venus fly trap
they even target their emissions

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to attract their prey .
Ofcourse
Many flowers spread VOC’s
as scent like aroma to attract pollinators .
It is
Also well known
that legume roots emit chemicals
as signals to invite rhizobia
for symbiotic Nitrogen fixation in nodules.
Some
Parasites like Cuscuta elicit VOC’s
to interact with hosts like tomatoes
and know their location,
Their seedlings grow towards hosts
and distinguishing between
tomato and wheat VOC’s grow towards.
preferred Tomato as per Runyon et al.
Monika G
Of Australia observed that roots of Corn
in water make clicking sounds

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and when sound of same frequency
are played back they respond by
moving towards the source ,
showing plants produce & respond to sound.
And Red chilli plants seem to know their
neighbours !– as those sown next to fennel
germinate more quickly ;and this is so
even when all known channels are blocked !
How ? Via acoustics?
It is still an open question .
In India
Sir JC Bose had observed plant responses
to stimuli a hundred years ago; He had
observed that in Mimosa & Desmodium
these are electro mechanical in nature,;
The stimulus transmitted electrically
cause changes in turgor pressure
and spontaneous movement accordingly.;
the pulvinus acting as motor organ and the
phloem as the transmitting channel in the process.

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And now
Calvo et al has confirmed
plant communication via electric signals
transmitted through phloem pathway
with cytosolic Ca ++
ions mediating it inside cells.
Hats off
To scientists .; Hats off to Plants.
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Post script
It has been found that that the VOC’s
include Terpenoids , Oxylipins
and others like Ethylene etc;
Root secretions include lactins
and Abscisic acid etc.