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Biological, physiological, genitical, technical aspects from the mycorrhization between Boletus and forest plant


In forest ecosystems, tress cannot survive without mycorrhizes. This symbiosis is fundamentally essential as well for the tree as for the fungus. For more than 20 years, the mycorrhizal inoculation of forest tree has had a two fold objective: the enhancement of wood production and edible fungi production. Since 1973, truffle sporophores have been used to inoculate oak seedings which are commercially produced. Paradoxically, despite of the frequency of the Boletus species allowed to get mycelium. Mycorrhizal synthesis has been achieved in controlled conditions in a rather too long period of time (sometimes one year). Despite these positive results, the mycorrhizal association with Boletus and forest plant is neither known nor controlled yet. Indeed, no Boletus fruitbody was able to be obtained after being transplanted. For this, several reasons can be quoted: little knowledge of the Boletus biology, bad control of the physico-chemical conditions of the medium, imperfect struggle against contamination by the spores of other fungi -T.terrestris Hebeloma. This project consists of characterizing the genetic diversity of the Boletus, isolating, selecting and testing the Mycorrhization Helper, determining the nature of the trophic exchanges between the fungi and the forest plants and finally, optimising the mycorrhizal synthesis by varying the conditions of the environment and medium. The results of this project will be used by a development study which will consist of finding a cultivation process of Boletus-plants with an idustrial finality.

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Rue de l'école Forestiere
19250 Meymac

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