Fig. 1

Biometric traits of seedlings of Q. suber inoculated with S. granulatus + Mesorhizobium sp., commercial Mix and non-inoculated. Each bar represents the mean with 95% confidence interval. For each nursery, different letters indicate significant differences according to Tukey’s multiple range test at P < 0.05. Asterisks mean differences between nurseries for a given inoculation treatment by Student’s t test at P < 0.05. N = 120