Antioxidant enzymes levels. (a) Ascorbate peroxidase, (b) catalase, (c) guaiacol peroxidase, and (d) superoxide dismutase activities in the leaves and roots of M. sativa after 60 days under greenhouse conditions with a nutrient-poor soil as a substrate. Values are means ± S.D. (n = 16). Different letters indicate means that are significantly different from each other (one-way ANOVA; LSD test p < 0.0001). C–: non inoculation; MA11: inoculation with E. medicae MA11; Vg: inoculation with V. gossypii JM-310T; Vp: inoculation with V. paradoxus S110T; Vg + MA11: co-inoculation with V. gossypii JM-310T and E. medicae MA11; Vp + MA11: co-inoculation with V. paradoxus S110T and E. medicae MA11; CSV: inoculation with V. gossypii JM-310T, V. paradoxus S110T, and E. medicae MA11.