Involvement of an antioxidant defense system in the adaptive response to cadmium in maize seedlings (Zea mays L.)

Xianghua XU, Cuiying LIU, Xiaoyan ZHAO, Renying LI, Wenjing DENG

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17 Citations (Scopus)

Abstract

Chemical and biological analyses were used to investigate the growth response and antioxidant defense mechanism of maize seedlings (Zea mays L.) grown in soils with 0–100 mg kg¯¹ Cd. Results showed that maize seedlings have strong abilities to accumulate and tolerate high concentrations of Cd. For soil with 50 mg kg¯¹ Cd, the Cd contents in roots and shoots of maize seedlings are as large as 295.6 and 153.0 mg kg¯¹ DW, respectively, without visible symptoms of toxicity. Lower soil Cd concentrations lead to a decrease in reduced glutathione (GSH) content in leaves of maize seedlings, whereas higher soil Cd concentrations resulted in an increase in the activities of superoxide dismutase, guaiacol peroxidase, catalase, and ascorbate peroxidase. Maize seedlings have strong capacities to adapt to low concentrations of Cd by consuming GSH and to develop an antioxidative enzyme system to defend against high-Cd stress. Copyright © 2014 Springer Science+Business Media New York.
Original languageEnglish
Pages (from-to)618-624
JournalBulletin of Environmental Contamination and Toxicology
Volume93
Issue number5
DOIs
Publication statusPublished - Nov 2014

Fingerprint

Antioxidants
Cadmium
Seedlings
Zea mays
Soils
Soil
Ascorbate Peroxidases
Catalase
Superoxide Dismutase
Glutathione
Toxicity
Enzymes
Industry
Growth

Citation

Xu, X., Liu, C., Zhao, X., Li, R., & Deng, W. (2014). Involvement of an antioxidant defense system in the adaptive response to cadmium in maize seedlings (Zea mays L.). Bulletin of Environmental Contamination and Toxicology, 93(5), 618-624.

Keywords

  • Cadmium
  • Oxidative stress
  • Antioxidant enzymes
  • Glutathione
  • Maize seedlings