Development of a biotic ligand model for acute zinc toxicity to barley root elongation

Modeling toxicity of binary metal mixtures (Cu2+–Ag+, Cu2+–Zn2+) to lettuce, Lactuca sativa, with the biotic ligand model

“…On the basis of the estimations of EA50 M , L. sativa had higher tolerance to Zn 2þ and Ag þ but was more sensitive to Cu 2þ than V. unguiculata. Moreover, the BLM parameters reflecting the toxicity of Cu 2þ and Zn 2þ individually obtained in the present study on L. sativa were, in general, within the ranges reported from other studies on barley, Hordeum vulgare [18][19][20] ( Table 1). This indicates negligible differences in the sensitivities of L. sativa and H. vulgare to Cu 2þ and Zn 2þ based on the BLM parameters.…”

Development of a Multi-Species Biotic Ligand Model Predicting the Toxicity of Trivalent Chromium to Barley Root Elongation in Solution Culture

“…The binding constants log K HBL (4.74) in the present study was found to be lower than that (log K HBL  = 6.48) reported by Thakali et al [18], [19] in a terrestrial BLM for Cu toxicity to barley root elongation bioassay in soil solutions, whereas it was higher than (log K HBL  = 4.29) reported by Li et al [9] in the BLM for acute Ni toxicity to barley root elongation and that (log K HBL  = 4.27) reported by Wang et al [28] in a BLM for acute Zn toxicity to barley root elongation in culture solutions. The value of log K CaBL (2.64) in the present study was similar with the result of acute Cu-BLM for root growth of T. aestivum developed by Luo et al [29] (log K CaBL  = 2.43), but higher than that (log K CaBL  = 1.60) reported by Wang et al [28]. The value of log K MgBL (2.98) in the present study was similar with the result of acute Cu-BLM for root growth of T. aestivum developed by Wang et al [20] (log K MgBL  = 2.92), whereas it was lower than that (log K MgBL  = 4.01) reported by Li et al [9] and that (log K MgBL  = 3.72) reported by Wang et al [28].…”

“…In the case of Zn toxicity, it appeared that the increase of Mg 2+ and K + activity could alleviate Zn toxicity to wheat ( T. aestivum ) and radish ( Raphanus sativus ) [28]. The protective effects of Mg 2+ , Ca 2+ , K + and H + on Zn 2+ toxicity to barley were also found by Wang et al [29]. The alleviating effects of cations such as Ca 2+ , Mg 2+ , K + and H + on metal toxicity can also be interpreted in terms of membrane-surface electrical potentials [30], [31].…”

Site-specific water quality criteria for lethal/sublethal protection of freshwater fish exposed to zinc in southern Taiwan

“…The stability constant of Mg 2þ shows the higher strength of binding to biotic ligand site in plant, fish, water flea, and microalga, ranging from 3.1 to 4.4 L mol À1 of logK (Heijerick et al, 2002;De Schamphelaere and Janssenm, 2004;Clifford and McGeer, 2010;Wang et al, 2010). De Schamphelaere and Janssen (2004) found that the acute and chronic Zn toxicities decreased approximately 3-and 4-folds, respectively, when 0.05e3 mM of Mg 2þ were added to the test solution.…”