Abstract: The interactions between arbuscular mycorrhizal (AM) fungi Glomus versiforme Berch , Gigaspora margarita Becker & Hall , Glomus mosseae Nicolson & Gedermann and Meloidogyne incognita on grape ‘Kyoho’
were studied under the condition of pot culture in a greenhouse. The results showed that the tested AMfungi were able to inhibit the generation and development of M. incognita , decrease the number of the second2stage juveniles in the soil of root zone , the diameter of egg mass , the number of eggs in per egg mass and on per gram root ; In addition , the treatment of pre2inoculating AM fungi and post2inoculating M. incognita performed more effectively on grape’s resistance to M. incognita than that inoculating AM fungi and M. incognita concurrently ; Inoculating AMfungi promoted plant’s photosynthesis , increased plant hight , stem diameter , leaf area , dry mass of tops or roots , which compensated the damage produced by M. incognita ; Inoculating M. incognita decreased the number of vesiculars and entry points number of G. mosseae , as well as the colonization percent of G. versiforme and Gi. margarita , while increased the number of vesiculars and entry points of G. versiforme and Gi . margarita. Therefore , we can not give a common conclusion to the every association of AMfungi-plant-nematode.

Key words: AMfungi, Grape, Meloidogyne incognita, Interation