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Up-regulation of chloroplastic antioxidant capacity is involved in alleviation of nickel toxicity of Zea mays L. by exogenous salicylic acid.
Ecotoxicol Environ Saf. 2009 Jul; 72(5):1354-62.EE

Abstract

A pot experiment was carried out to investigate the effect of exogenous salicylic acid (SA) on the growth, photosynthesis, oxidative stress and responses of chloroplastic antioxidant defense system of maize (Zea mays L.) plants grown in a nickel (Ni)-contaminated soil. The results indicate that exogenous SA significantly decreased the reduction in dry weight, chlorophyll and beta-carotene contents, and net photosynthetic rate of the Ni-stressed maize, demonstrating an alleviating effect of SA on Ni toxicity of plants. Superoxide anion generation rate, H(2)O(2) and malondialdehyde (MDA) contents, and lipoxygenase (LOX, EC 1.13.11.12) activity significantly increased in the chloroplasts of maize exposed to Ni stress, revealing an oxidative damage occurred in maize chloroplasts, whereas, the values of these parameters were markedly lowered in the SA-treated plants under Ni stress. Application of SA significantly enhanced the activities of superoxide dismutase (SOD, EC 1.15.1.1), ascorbate peroxidase (APX, EC 1.11.1.11), monodehydroascorbate reductase (MDHAR, EC 1.6.5.4), dehydroascorbate reductase (DHAR, EC 1.8.5.1) and glutathione reductase (GR, EC 1.6.4.2), and the poll of reduced ascorbate and glutathione in chloroplasts of the Ni-stressed maize. Accordingly, the fact that SA up-regulates the capacity of antioxidant defense system in chloroplasts, thus reducing the oxidative damage, is involved in the SA-induced alleviation of Ni toxicity in maize.

Authors+Show Affiliations

School of Life Sciences, Hunan University of Science and Technology, Xiangtan, Hunan, China. haihuawxt@163.comNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

19375798

Citation

Wang, Haihua, et al. "Up-regulation of Chloroplastic Antioxidant Capacity Is Involved in Alleviation of Nickel Toxicity of Zea Mays L. By Exogenous Salicylic Acid." Ecotoxicology and Environmental Safety, vol. 72, no. 5, 2009, pp. 1354-62.
Wang H, Feng T, Peng X, et al. Up-regulation of chloroplastic antioxidant capacity is involved in alleviation of nickel toxicity of Zea mays L. by exogenous salicylic acid. Ecotoxicol Environ Saf. 2009;72(5):1354-62.
Wang, H., Feng, T., Peng, X., Yan, M., & Tang, X. (2009). Up-regulation of chloroplastic antioxidant capacity is involved in alleviation of nickel toxicity of Zea mays L. by exogenous salicylic acid. Ecotoxicology and Environmental Safety, 72(5), 1354-62. https://doi.org/10.1016/j.ecoenv.2009.03.008
Wang H, et al. Up-regulation of Chloroplastic Antioxidant Capacity Is Involved in Alleviation of Nickel Toxicity of Zea Mays L. By Exogenous Salicylic Acid. Ecotoxicol Environ Saf. 2009;72(5):1354-62. PubMed PMID: 19375798.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Up-regulation of chloroplastic antioxidant capacity is involved in alleviation of nickel toxicity of Zea mays L. by exogenous salicylic acid. AU - Wang,Haihua, AU - Feng,Tao, AU - Peng,Xixu, AU - Yan,Mingli, AU - Tang,Xinke, Y1 - 2009/04/17/ PY - 2008/10/18/received PY - 2009/03/09/revised PY - 2009/03/15/accepted PY - 2009/4/21/entrez PY - 2009/4/21/pubmed PY - 2009/8/26/medline SP - 1354 EP - 62 JF - Ecotoxicology and environmental safety JO - Ecotoxicol Environ Saf VL - 72 IS - 5 N2 - A pot experiment was carried out to investigate the effect of exogenous salicylic acid (SA) on the growth, photosynthesis, oxidative stress and responses of chloroplastic antioxidant defense system of maize (Zea mays L.) plants grown in a nickel (Ni)-contaminated soil. The results indicate that exogenous SA significantly decreased the reduction in dry weight, chlorophyll and beta-carotene contents, and net photosynthetic rate of the Ni-stressed maize, demonstrating an alleviating effect of SA on Ni toxicity of plants. Superoxide anion generation rate, H(2)O(2) and malondialdehyde (MDA) contents, and lipoxygenase (LOX, EC 1.13.11.12) activity significantly increased in the chloroplasts of maize exposed to Ni stress, revealing an oxidative damage occurred in maize chloroplasts, whereas, the values of these parameters were markedly lowered in the SA-treated plants under Ni stress. Application of SA significantly enhanced the activities of superoxide dismutase (SOD, EC 1.15.1.1), ascorbate peroxidase (APX, EC 1.11.1.11), monodehydroascorbate reductase (MDHAR, EC 1.6.5.4), dehydroascorbate reductase (DHAR, EC 1.8.5.1) and glutathione reductase (GR, EC 1.6.4.2), and the poll of reduced ascorbate and glutathione in chloroplasts of the Ni-stressed maize. Accordingly, the fact that SA up-regulates the capacity of antioxidant defense system in chloroplasts, thus reducing the oxidative damage, is involved in the SA-induced alleviation of Ni toxicity in maize. SN - 1090-2414 UR - https://www.unboundmedicine.com/medline/citation/19375798/Up_regulation_of_chloroplastic_antioxidant_capacity_is_involved_in_alleviation_of_nickel_toxicity_of_Zea_mays_L__by_exogenous_salicylic_acid_ DB - PRIME DP - Unbound Medicine ER -