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Dual inoculations on Leucaena esculenta plants of either Glomus versiforme and Rhizobium loti NGR 8 or Glomus sp. and R. loti ENCB 31, gave higher growth and phosphorus accumulation compared with treatments with a single micro-symbiont. The above combinations could be used in a re-forestation programme with L. esculenta in the highlands of Oaxaca State, Mexico. The use of endomycorrhized plants is recommended to alleviate the planting shock-phase, particularly in arid zones, and also the risk of root colonization by possibly less-efficient indigenous fungi.