Table 4 Ionic ratios in young Eucalyptus urophylla plants sprayed with EBR and exposed to Ni toxicity
Ni2+ | EBR | Root | Stem | Leaf | |||
|---|---|---|---|---|---|---|---|
Ca2+/Ni2+ ratio | |||||||
− | − | 5.65b |  | 36.86b |  | 172.48b |  |
− | + | 7.23a | 28% | 40.01a | 9% | 198.39a | 15% |
+ | − | 0.02c |  | 0.14d |  | 0.13d |  |
+ | + | 0.03c | 50% | 19c | 36% | 0.18c | 38% |
Mn2+/Ni2+ ratio | |||||||
− | − | 24.01b |  | 152.84b |  | 1166.96b |  |
− | + | 27.40a | 14% | 173.36a | 13% | 1387.43a | 19% |
+ | − | 0.07d |  | 0.33d |  | 0.98d |  |
+ | + | 0.10c | 43% | 0.46c | 39% | 1.13c | 15% |