TY - JOUR
T1 - Influence of calcium, magnesium, sodium, potassium and pH on copper toxicity to barley (Hordeum vulgare)
AU - Lock, Koen
AU - Criel, P
AU - De Schamphelaere, K. A. C
AU - Van Eeckhout, Hilde
AU - Janssen, C. R
N1 - Publication Authorstring : Lock, K.; Criel, P.; De Schamphelaere, K.A.C.; Van Eeckhout, H.; Janssen, C.R.
Publication RefStringPartII : <i>Ecotoxicology and Environmental Safety 68(2)</i>: 299-304
PY - 2007
Y1 - 2007
N2 - The extent to which Ca2+, Mg2+, Na+, K+ ions and pH independently influence copper toxicity to barley (Hordeum vulgare) was assessed by measuring root growth in nutrient solutions. Increased Ca2+ activity resulted in a sixfold decrease in EC50Cu2+ values, while a positive relationship between the cation activity and the EC50 was expected. Increased Mg2+ activity resulted in a twofold increase in EC50Cu2+ values. Na+, K+ and H+ activities did not significantly affect Cu2+ toxicity. The obtained results indicated that competition for binding sites between Cu2+ and cations such as Ca2+, Mg2+, Na+, K+ and H+ is not an important factor in determining Cu2+ toxicity to H. vulgare. However, the EC50s could, with one exception, be predicted within a factor three based on the free Cu2+ activity, indicating that the free Cu2+ activity cannot only be used to predict metal toxicity to aquatic, but also to terrestrial organisms.
AB - The extent to which Ca2+, Mg2+, Na+, K+ ions and pH independently influence copper toxicity to barley (Hordeum vulgare) was assessed by measuring root growth in nutrient solutions. Increased Ca2+ activity resulted in a sixfold decrease in EC50Cu2+ values, while a positive relationship between the cation activity and the EC50 was expected. Increased Mg2+ activity resulted in a twofold increase in EC50Cu2+ values. Na+, K+ and H+ activities did not significantly affect Cu2+ toxicity. The obtained results indicated that competition for binding sites between Cu2+ and cations such as Ca2+, Mg2+, Na+, K+ and H+ is not an important factor in determining Cu2+ toxicity to H. vulgare. However, the EC50s could, with one exception, be predicted within a factor three based on the free Cu2+ activity, indicating that the free Cu2+ activity cannot only be used to predict metal toxicity to aquatic, but also to terrestrial organisms.
U2 - 10.1016/j.ecoenv.2006.11.014
DO - 10.1016/j.ecoenv.2006.11.014
M3 - A1: Web of Science-article
VL - 68
SP - 299
EP - 304
JO - Ecotoxicology and Environmental Safety
JF - Ecotoxicology and Environmental Safety
SN - 0147-6513
IS - 2
ER -