Data set with all the references and variables used as factors in the meta-analyses.

(1) Experimental conditions, (2) Mycorrhizal treatment, (3) Ecosystem, (4) Performance measurement, including plant part (4a) and type of nutrient (4b) and (5) Mycorrhizal type. The species of the nurse and the facilitated plants are presented with the mean, sample size (N) and standard error (SE) of the performance measurement reported for the facilitated plant. Data for the control and treated treatments are presented in different columns. We considered “treated” the treatment in which the mycorrhizal fungi were expected to be reduced. NA stands for not available data