Table 3.
Total, arbuscular, and vesicular mycorrhizal colonization of alfalfa in response to different conditions. Conditions consisted of non-inoculated alfalfa (A), combined with F. mosseae (A+Fm), plus S. wittichii RW1 (A+Fm+RW1), plus rhamnolipids Rh (A+Fm+RW1+Rh), plus microbiota µb (A+Fm+RW1+Rh+µb). Shoots and roots dry weight of alfalfa (A), combined with F. mosseae (A+Fm), plus S. wittichii RW1 (A+Fm+RW1), plus rhamnolipids Rh (A+Fm+RW1+Rh), plus microbiota µb (A+Fm+RW1+Rh+µb) grown in microcosms for six months on the aged polluted soil. Different letters indicate significant differences between conditions according to the ANOVA one-way test (p ≤ 0.05). Values are means ± s.d. (n = 5).
| A | A+Fm | A+Fm+RW1 | A+Fm+RW1+Rh | A+Fm+RW1+Rh+µb | ||
|---|---|---|---|---|---|---|
| Mycorrhizal rate (%) | Total | 0 | 47 ± 2 a | 39 ± 4 ab | 30 ± 8 b | 40 ± 6 ab |
| Arbuscular | 0 | 12 ± 2 b | 7 ± 1 b | 7 ± 3 ab | 10 ± 1 b | |
| Vesicular | 0 | 31 ± 3 a | 25 ± 8 ab | 20 ± 6 b | 23 ± 2 ab | |
| Plant dry weight (mg plant−1) | Shoot dry weight | 97 ± 1 a | 279 ± 1.6 d | 171 ± 30 b | 191 ± 15 b | 207 ± 18 bc |
| Root dry weight | 60 ± 12 ab | 67 ± 19 b | 76 ± 3 bc | 39 ± 8 a | 55 ± 2 ab |