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Development and validation of abiotic ligand model for nickel toxicity to wheat (Triticum aestivum).
J Environ Sci (China). 2017 Dec; 62:22-30.JE

Abstract

A terrestrial biotic ligand model (t-BLM) was developed to predict nickel toxicity to wheat (Triticum aestivum) root elongation in hydroponic solutions. The competitive effects of five major cations (Ca2+, Mg2+, Na+, K+ and H+) on Ni toxicity were investigated and Mg2+was found to be a strong competitor, while H+ showed less competing effect. Besides free Ni2+, the toxicity induced by the species NiHCO3+ was non-neglect able at pH>7 because NiHCO3+ occupied a significant fraction of total Ni under such condition. Thus, a t-BLM including Ni2+, NiHCO3+, Mg2+, and H+ could successfully predict the nickel toxicity to wheat root elongation and it performed better prediction than the conventional free ion activity model. In addition, the model was examined with two sets of independent experiments, which contained multiple cations and low-molecular-weight organic acids to mimic the rhizosphere condition. The developed t-BLM well predicted nickel toxicity in both experiments since it can account in both complexation and competition effects, suggesting its potential to be used in a complicated matrix like soil solution. This study provides direct evidence that the t-BLM is a reliable method for the risk assessment of nickel in terrestrial system.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Jiang Y
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China. Electronic address: jiangyang_nju@yeah.net.
Gu X
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China. Electronic address: xygu@nju.edu.cn.
Zhu B
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China.
Gu C
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China.

MeSH

LigandsModels, BiologicalNickelSoilSoil PollutantsToxicity TestsTriticum

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29289288

Citation

Jiang, Yang, et al. "Development and Validation of Abiotic Ligand Model for Nickel Toxicity to Wheat (Triticum Aestivum)." Journal of Environmental Sciences (China), vol. 62, 2017, pp. 22-30.
Jiang Y, Gu X, Zhu B, et al. Development and validation of abiotic ligand model for nickel toxicity to wheat (Triticum aestivum). J Environ Sci (China). 2017;62:22-30.
Jiang, Y., Gu, X., Zhu, B., & Gu, C. (2017). Development and validation of abiotic ligand model for nickel toxicity to wheat (Triticum aestivum). Journal of Environmental Sciences (China), 62, 22-30. https://doi.org/10.1016/j.jes.2017.06.005
Jiang Y, et al. Development and Validation of Abiotic Ligand Model for Nickel Toxicity to Wheat (Triticum Aestivum). J Environ Sci (China). 2017;62:22-30. PubMed PMID: 29289288.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Development and validation of abiotic ligand model for nickel toxicity to wheat (Triticum aestivum). AU - Jiang,Yang, AU - Gu,Xueyuan, AU - Zhu,Bojing, AU - Gu,Cheng, Y1 - 2017/06/23/ PY - 2017/03/12/received PY - 2017/04/25/revised PY - 2017/06/09/accepted PY - 2018/1/1/entrez PY - 2018/1/1/pubmed PY - 2018/1/4/medline KW - Model KW - Nickel KW - Risk assessment KW - Toxicity KW - Wheat SP - 22 EP - 30 JF - Journal of environmental sciences (China) JO - J Environ Sci (China) VL - 62 N2 - A terrestrial biotic ligand model (t-BLM) was developed to predict nickel toxicity to wheat (Triticum aestivum) root elongation in hydroponic solutions. The competitive effects of five major cations (Ca2+, Mg2+, Na+, K+ and H+) on Ni toxicity were investigated and Mg2+was found to be a strong competitor, while H+ showed less competing effect. Besides free Ni2+, the toxicity induced by the species NiHCO3+ was non-neglect able at pH>7 because NiHCO3+ occupied a significant fraction of total Ni under such condition. Thus, a t-BLM including Ni2+, NiHCO3+, Mg2+, and H+ could successfully predict the nickel toxicity to wheat root elongation and it performed better prediction than the conventional free ion activity model. In addition, the model was examined with two sets of independent experiments, which contained multiple cations and low-molecular-weight organic acids to mimic the rhizosphere condition. The developed t-BLM well predicted nickel toxicity in both experiments since it can account in both complexation and competition effects, suggesting its potential to be used in a complicated matrix like soil solution. This study provides direct evidence that the t-BLM is a reliable method for the risk assessment of nickel in terrestrial system. SN - 1001-0742 UR - https://www.unboundmedicine.com/medline/citation/29289288/Development_and_validation_of_abiotic_ligand_model_for_nickel_toxicity_to_wheat__Triticum_aestivum__ DB - PRIME DP - Unbound Medicine ER -