4.3. Comparison of different species of AM with different origin
Although it is clear from the results that M3 and M4 are the most effective AM species on corn nutrient uptake in a compacted soil, M2 showed to be able to efficiently compete with other microorganisms and increased nutrient uptake of P, K, Mn and Zn even at C4 under unsterilized conditions. These data also reverify that the origin of AM may not influence their performance under stressful conditions (Burleigh et al., 2002).