Les mycorhizes

For the first time, the numerous publications regarding the anatomy, cytology and cytophysiology of mycorrhizas have not been gathered into a comprehensive treatise. It is made up according to the following pattern: - a short first chapter dealing with the concept of mycorrhizas shows the diversity of the nomenclature and of the structures - the second chapter presents the partners involved in mycorrhizal symbiosis; systematic positions, conditions of culture and of experimental reassociation are stated in a general way - the third and fourth chapters respectively analyse the results which have been collected about the cytology of fungal elements and of root cells - the fifth, sixth and seventh chapters put together the data regarding the cellular integration in ectomycorrhizas, endomycorrhizas and ectendomycorrhizas Nowadays two groups present the most important stakes: ectomycorrhizas for sylviculture and the production of edible mushrooms, vesicular-arbuscular endomycorrhizas for agriculture and horticulture. The creation of new products corresponding to these stakes is limited by several problems. Our team endeavours to remove two of these; (1) the cloning of host-plants; if this cloning is not controlled, in the symbioses created the plant material displays genetic variability; (2) the in vitro culture of the endophytes, a limitating factor, particularly as regards Endogonaceae forming endomycorrhizas.