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Effects of soil cadmium on growth, oxidative stress and antioxidant system in wheat seedlings (Triticum aestivum L.).
Chemosphere. 2007 Aug; 69(1):89-98.C

Abstract

Effects of different concentrations of soil cadmium (0-33mg kg(-1)) on growth, oxidative stress, and antioxidant response of wheat seedlings (Triticum aestivum L.) were investigated using pot experiments. A slight stimulatory effect on seedling growth was observed, especially at low Cd concentrations (less than 3.3mg kg(-1)). Results of the electron paramagnetic resonance (EPR) determination showed a decrease in unstable free radical level in the leaves, followed by a significant increase with increasing Cd concentrations. Malondialdehyde (MDA) contents were significantly enhanced by a high Cd concentration. Activity levels of some antioxidant enzymes in the leaves, including superoxide dismutase (SOD, EC1.12.1.1), catalase (CAT, EC1.11.1.6), guaiacol peroxidase (GPX, EC1.11.1.7), ascorbate peroxidase (APX, EC1.11.1.11) and glutathione reductase (GR, EC1.6.4.2), did not change much at low Cd concentrations (less than 3.3mg kg(-1)), but fluctuated drastically at high Cd concentrations. GSH contents and GSH/GSSG ratios decreased at low Cd concentrations, then increased at high Cd concentrations. Wheat seedlings might overcompensate at low Cd concentrations, resulting in a low oxidative stress and a positive effect on growth. Changes in biochemical parameters would occur before any visible symptom of toxicity appeared, and the endpoint based on these parameters might be more sensitive or indicative than morphological observations in revealing the eco-toxicity of Cd. Based on the results of this study, we propose that the toxic critical value of soil Cd in inducing oxidative stress to wheat seedlings is between 3.3mg kg(-1) and 10mg kg(-1).

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Authors+Show Affiliations

Lin R
State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210093, China.
Wang X
No affiliation info available
Luo Y
No affiliation info available
Du W
No affiliation info available
Guo H
No affiliation info available
Yin D
No affiliation info available

MeSH

AntioxidantsCadmiumGlutathioneGlutathione DisulfideLipid PeroxidationOxidative StressOxidoreductasesPlant LeavesPlant RootsPlant ShootsSeedlingsSoil PollutantsTriticum

Pub Type(s)

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

Language

eng

PubMed ID

17568654

Citation

Lin, Renzhang, et al. "Effects of Soil Cadmium On Growth, Oxidative Stress and Antioxidant System in Wheat Seedlings (Triticum Aestivum L.)." Chemosphere, vol. 69, no. 1, 2007, pp. 89-98.
Lin R, Wang X, Luo Y, et al. Effects of soil cadmium on growth, oxidative stress and antioxidant system in wheat seedlings (Triticum aestivum L.). Chemosphere. 2007;69(1):89-98.
Lin, R., Wang, X., Luo, Y., Du, W., Guo, H., & Yin, D. (2007). Effects of soil cadmium on growth, oxidative stress and antioxidant system in wheat seedlings (Triticum aestivum L.). Chemosphere, 69(1), 89-98.
Lin R, et al. Effects of Soil Cadmium On Growth, Oxidative Stress and Antioxidant System in Wheat Seedlings (Triticum Aestivum L.). Chemosphere. 2007;69(1):89-98. PubMed PMID: 17568654.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of soil cadmium on growth, oxidative stress and antioxidant system in wheat seedlings (Triticum aestivum L.). AU - Lin,Renzhang, AU - Wang,Xiaorong, AU - Luo,Yi, AU - Du,Wenchao, AU - Guo,Hongyan, AU - Yin,Daqiang, Y1 - 2007/06/12/ PY - 2006/12/06/received PY - 2007/03/15/revised PY - 2007/04/13/accepted PY - 2007/6/15/pubmed PY - 2007/10/31/medline PY - 2007/6/15/entrez SP - 89 EP - 98 JF - Chemosphere JO - Chemosphere VL - 69 IS - 1 N2 - Effects of different concentrations of soil cadmium (0-33mg kg(-1)) on growth, oxidative stress, and antioxidant response of wheat seedlings (Triticum aestivum L.) were investigated using pot experiments. A slight stimulatory effect on seedling growth was observed, especially at low Cd concentrations (less than 3.3mg kg(-1)). Results of the electron paramagnetic resonance (EPR) determination showed a decrease in unstable free radical level in the leaves, followed by a significant increase with increasing Cd concentrations. Malondialdehyde (MDA) contents were significantly enhanced by a high Cd concentration. Activity levels of some antioxidant enzymes in the leaves, including superoxide dismutase (SOD, EC1.12.1.1), catalase (CAT, EC1.11.1.6), guaiacol peroxidase (GPX, EC1.11.1.7), ascorbate peroxidase (APX, EC1.11.1.11) and glutathione reductase (GR, EC1.6.4.2), did not change much at low Cd concentrations (less than 3.3mg kg(-1)), but fluctuated drastically at high Cd concentrations. GSH contents and GSH/GSSG ratios decreased at low Cd concentrations, then increased at high Cd concentrations. Wheat seedlings might overcompensate at low Cd concentrations, resulting in a low oxidative stress and a positive effect on growth. Changes in biochemical parameters would occur before any visible symptom of toxicity appeared, and the endpoint based on these parameters might be more sensitive or indicative than morphological observations in revealing the eco-toxicity of Cd. Based on the results of this study, we propose that the toxic critical value of soil Cd in inducing oxidative stress to wheat seedlings is between 3.3mg kg(-1) and 10mg kg(-1). SN - 0045-6535 UR - https://www.unboundmedicine.com/medline/citation/17568654/Effects_of_soil_cadmium_on_growth_oxidative_stress_and_antioxidant_system_in_wheat_seedlings__Triticum_aestivum_L___ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(07)00565-6 DB - PRIME DP - Unbound Medicine ER -