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Combined toxicity of cadmium and arsenate to wheat seedlings and plant uptake and antioxidative enzyme responses to cadmium and arsenate co-contamination.
Ecotoxicol Environ Saf. 2007 Oct; 68(2):305-13.EE

Abstract

To demonstrate the combined toxicity of cadmium (Cd) and arsenate (As) to early developmental stages of six wheat varieties, young seedlings were exposed to solutions containing both contaminants and seed germination frequency and seedling biomass, root length and shoot height, Cd and As uptake, amylase activity, superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), soluble protein and malondialdehyde (MDA) concentrations in the seedlings were investigated. Seed germination and seedling biomass and root and shoot elongation decreased significantly (P<0.01) with increasing concentrations of Cd and As and root length appeared to be the most sensitive parameter. Uptake of Cd and As by seedlings increased with increasing Cd and As concentrations in the test solutions and obeyed Michaelis-Menten kinetics. Average total amylolytic, alpha-amylase and beta-amylase activities seemed to decrease with Cd concentrations >4mgL(-1) and As > or = 4mgL(-1). Seedling contents of soluble protein, MDA and POD increased and the activities of SOD and CAT decreased with increasing concentrations of Cd and As following an initial increase. The MDA content was linearly and positively correlated with seed germination frequency, biomass increment, root length and shoot height elongation (P<0.01), suggesting that MDA may be useful as a biological indicator of Cd and As toxicity in wheat. Combined exposure to Cd and As produced greater toxicity to wheat than single exposure to each metal separately, and Cd and As in combination had an additive effect on seed germination frequency and antagonistic effects on seedling biomass and shoot and root elongation.

Authors+Show Affiliations

Liu X
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China.
Zhang S
No affiliation info available
Shan XQ
No affiliation info available
Christie P
No affiliation info available

MeSH

AntioxidantsArsenatesBiomarkersBiomassCadmium ChlorideCatalaseDose-Response Relationship, DrugDrug InteractionsEnzymesGerminationHydroponicsMalondialdehydePeroxidasePlant ProteinsSeedlingsSoil PollutantsSuperoxide DismutaseTriticumalpha-Amylasesbeta-Amylase

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17239437

Citation

Liu, Xiaoli, et al. "Combined Toxicity of Cadmium and Arsenate to Wheat Seedlings and Plant Uptake and Antioxidative Enzyme Responses to Cadmium and Arsenate Co-contamination." Ecotoxicology and Environmental Safety, vol. 68, no. 2, 2007, pp. 305-13.
Liu X, Zhang S, Shan XQ, et al. Combined toxicity of cadmium and arsenate to wheat seedlings and plant uptake and antioxidative enzyme responses to cadmium and arsenate co-contamination. Ecotoxicol Environ Saf. 2007;68(2):305-13.
Liu, X., Zhang, S., Shan, X. Q., & Christie, P. (2007). Combined toxicity of cadmium and arsenate to wheat seedlings and plant uptake and antioxidative enzyme responses to cadmium and arsenate co-contamination. Ecotoxicology and Environmental Safety, 68(2), 305-13.
Liu X, et al. Combined Toxicity of Cadmium and Arsenate to Wheat Seedlings and Plant Uptake and Antioxidative Enzyme Responses to Cadmium and Arsenate Co-contamination. Ecotoxicol Environ Saf. 2007;68(2):305-13. PubMed PMID: 17239437.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Combined toxicity of cadmium and arsenate to wheat seedlings and plant uptake and antioxidative enzyme responses to cadmium and arsenate co-contamination. AU - Liu,Xiaoli, AU - Zhang,Shuzhen, AU - Shan,Xiao-Quan, AU - Christie,Peter, Y1 - 2007/01/18/ PY - 2006/04/17/received PY - 2006/10/12/revised PY - 2006/11/03/accepted PY - 2007/1/24/pubmed PY - 2008/1/9/medline PY - 2007/1/24/entrez SP - 305 EP - 13 JF - Ecotoxicology and environmental safety JO - Ecotoxicol Environ Saf VL - 68 IS - 2 N2 - To demonstrate the combined toxicity of cadmium (Cd) and arsenate (As) to early developmental stages of six wheat varieties, young seedlings were exposed to solutions containing both contaminants and seed germination frequency and seedling biomass, root length and shoot height, Cd and As uptake, amylase activity, superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), soluble protein and malondialdehyde (MDA) concentrations in the seedlings were investigated. Seed germination and seedling biomass and root and shoot elongation decreased significantly (P<0.01) with increasing concentrations of Cd and As and root length appeared to be the most sensitive parameter. Uptake of Cd and As by seedlings increased with increasing Cd and As concentrations in the test solutions and obeyed Michaelis-Menten kinetics. Average total amylolytic, alpha-amylase and beta-amylase activities seemed to decrease with Cd concentrations >4mgL(-1) and As > or = 4mgL(-1). Seedling contents of soluble protein, MDA and POD increased and the activities of SOD and CAT decreased with increasing concentrations of Cd and As following an initial increase. The MDA content was linearly and positively correlated with seed germination frequency, biomass increment, root length and shoot height elongation (P<0.01), suggesting that MDA may be useful as a biological indicator of Cd and As toxicity in wheat. Combined exposure to Cd and As produced greater toxicity to wheat than single exposure to each metal separately, and Cd and As in combination had an additive effect on seed germination frequency and antagonistic effects on seedling biomass and shoot and root elongation. SN - 0147-6513 UR - https://www.unboundmedicine.com/medline/citation/17239437/Combined_toxicity_of_cadmium_and_arsenate_to_wheat_seedlings_and_plant_uptake_and_antioxidative_enzyme_responses_to_cadmium_and_arsenate_co_contamination_ DB - PRIME DP - Unbound Medicine ER -