Table I.

Phosphorus concentration and dry weight of roots and shoots of Holcus lanatus plants of As-tolerant (T) and non-tolerant (NT) clones exposed to different concentrations of As(V) (1.33, 8 or 107 μm) and phosphate (10 or 100 μm)

Data represent the means (se in parentheses). *, includes dead plant material.

As(V) Concentration Phosphorus Concentration H. Ianatus Clone Dry Wt Phosphorus Concentration
Roots Shoots Roots Shoots
μM mg plant-1 mg g-1 dry wt
1.33 10 T 129 (20) 213 (4) 1.8 (0.03) 1.5 (0.07)
NT 104 (20) 171 (2) 2.2 (0.2) 1.5 (0.2)
100 T 423 (80) 234 (20) 3.1 (0.1) 5.4 (0.1)
NT 415 (30) 173 (8) 3.8 (0.2) 6.1 (0.5)
8 10 T 379 (50) 162 (8) 2.0 (0.06) 1.4 (0.1)
NT 123 (50) 85 (8) 3.1 (0.6) 2.4 (0.6)
100 T 430 (80) 238 (4) 3.1 (0.08) 4.9 (0.5)
NT 380 (80) 172 (6) 3.5 (0.2) 6.3 (0.2)
107 10 T 76 (1) 114 (20) 3.0 (0.004) 2.4 (0.04)
NT 5 (0.1)* 28 (7)* 10.1 (0.5)* 4.1 (0.2)*
100 T 414 (30) 198 (3) 2.8 (0.1) 4.0 (0.04)
NT 227 (20) 142 (3) 3.5 (0.4) 4.5 (0.1)