Wonder of adaptation, a mycorhizien mushroom is able to colonize at the same time a leek and a tomato, for example, by weaving between them a network of filaments. But how does it fact ? For Ian Sanders and Mohamed Hijri, university of Lausanne, in Switzerland, this organization has recourse to a single process in the alive reign : multigenomy.
The two researchers indeed showed that Glomus etunicatum, a mycorhizien mushroom, is equipped with several genomes. At least a dozen according to first results. It is the diversity of its genetic arsenal which would make it possible for this organization to colonize innumerable plants. A result which goes against all that one since knows : normally, an individual inherits, either of a half-genome of each one of its parents (it is the sexual reproduction), or of the genome of sound only relative in the case of a reproduction without sex.
In the case of Glomus etunicatum, the whole of the Mendel's genetics and the theories of Darwin are to be re-examined. For Mohamed Hijri, this evolutionary characteristic should not have been of primary importance for the only survival of the mycorhiziens mushrooms. « They are very old organizations, appeared at least 450 million years ago. This date coincides with the passage of the watery life to the terrestrial life. It is thus probable that the mycorhiziens mushrooms helped the plants to colonize the firm ground. »

(according to Sciences et avenir number 696, February 2005, page 33)