article paru sur Australian Geographic: "plants can talk to each other" 4 april 2012.

http://www.australiangeographic.com.au/journal/plants-can-talk-to-each-other.htm?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+ag-all+%28Australian+Geographic+-+All+Content%29&utm_content=Google+Reader#.T31wyJ8PV9o.facebook

"Plants are known to respond to light, but they can respond - and produce - sounds as well, new research says.

PLANTS THAT RESPOND to sound and 'click' to communicate with each other is surely the realm of science fiction. No anymore, according to research released this week  by the University of Western Australia.

"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," evolutionary ecologist Monica Gagliano from the University of Western Australia said.

"I was working one day in my herb garden and started to wonder if maybe plants were also sensitive to sounds - why not?  So I decided as a scientist to find out," Monica said.

Plants react and make sounds

Monica, along with Professor Daniel Robert at the University of Bristol in the UK and professor Stefano Mancuso at the University of Florence in Italy, found that the roots of young plants emitted and reacted to particular sounds.

They established that young roots of corn made regular clicking sounds.

They also found that when the roots were suspended in water, they leaned toward the source of a continuous sound emitted in the region of 220Hz, which was within the frequency range that the same roots emitted themselves.

Their research concluded that 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".

The researchers' findings have been published in the international journal Trends in Plant Science.

Monica said she hoped her work would attract further funding for more research into how plants made and reacted to sounds."

références: Monica Gagliano, Stefano Mancuso, Daniel Robert:
études: "Toward understanding plant bioacoustics"/ Magazine scientifique Trends in PLants Science.
http://www.cell.com/trends/plant-science/abstract/S1360-1385(12)00054-4

vidéos sur le sujet:

l'esprit des plantes /ARTE:

 

la force cachée des plantes partie1:

la force cachée des plantes partie 2:

 

étude sur la phytosociologie:
http://fr.wikipedia.org/wiki/Phytosociologie 

"La phytosociologie est la discipline botanique qui étudie les communautés végétales, en se basant sur des listes floristiques les plus exhaustives possibles. Elle est l'une des branches de l'étude de la végétation, laquelle peut s'appuyer sur d'autres types d'approches (physionomiques, climatiques, écomorphologiques, agricoles, sylvicoles, etc.)

L'analyse comparative des groupements végétaux permet de définir des catégories abstraites (par exemple des associations végétales et des phytotypes).

La phytosociologie décrit les relations spatio-temporelles entre végétaux. Elle s'intéresse aussi au fonctionnement écologique et botanique des végétations, à différentes échelles (des synusies aux biomes zonaux), c'est-à-dire aux relations des plantes entre elles et avec leur milieu de vie (climatsol), ainsi que leur répartition géographique. Ses méthodes et concepts sont transposables à tous les types d'organismes. Elle est donc une discipline écologique et géographique à part entière."