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Impact of proline application on cadmium accumulation, mineral nutrition and enzymatic antioxidant defense system of Olea europaea L. cv Chemlali exposed to cadmium stress.
Ecotoxicol Environ Saf. 2016 Jun; 128:195-205.EE

Abstract

Proline plays an important role in plant response to various environmental stresses. However, its involvement in mitigation of heavy metal stress in plants remains elusive. In this study, we examined the effectiveness of exogenous proline (10 and 20 mM) in alleviating cadmium induced inhibitory effects in young olive plants (Olea europaea L. cv. Chemlali) exposed to two Cd levels (10 and 30 mg CdCl2 kg(-1) soil). The Cd treatment induced substantial accumulation of Cd in both root and leaf tissues and a decrease in gas exchange, photosynthetic pigments contents, uptake of essential elements (Ca, Mg and K) and plant biomass. Furthermore, an elevation of antioxidant enzymes activities (superoxide dismutase, catalase, glutathione peroxydase) and proline content in association with relatively high amounts of hydrogen peroxide, thiobarbituric acid reactive substances and electrolyte leakage were observed. Interestingly, the application of exogenous proline alleviated the oxidative damage induced by Cd accumulation. In fact, Cd-stressed olive plants treated with proline showed an increase of antioxidant enzymes activities, photosynthetic activity, nutritional status, plant growth and oil content of olive fruit. Generally, it seems that proline supplementation alleviated the deleterious effects of young olive plants exposed to Cd stress.

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Authors+Show Affiliations

Zouari M
Laboratory of Plant Biodiversity and Dynamics of Ecosystems in Arid Area, Faculty of Sciences of Sfax, University of Sfax, Sfax, Tunisia; Laboratory of Improvement of Olive Productivity and Fruit Trees, Olive Tree Institute of Sfax, Sfax, Tunisia; University of Limoges, Laboratory of Botany and Cryptogamy, Faculty of Pharmacy of Limoges, Limoges, France. Electronic address: mohamedzouari2@gmail.com.
Ben Ahmed C
Laboratory of Plant Biodiversity and Dynamics of Ecosystems in Arid Area, Faculty of Sciences of Sfax, University of Sfax, Sfax, Tunisia; Laboratory of Improvement of Olive Productivity and Fruit Trees, Olive Tree Institute of Sfax, Sfax, Tunisia.
Elloumi N
Laboratory of Plant Biodiversity and Dynamics of Ecosystems in Arid Area, Faculty of Sciences of Sfax, University of Sfax, Sfax, Tunisia.
Bellassoued K
Laboratory of Animal Ecophysiology, Faculty of Sciences of Sfax, University of Sfax, Sfax, Tunisia.
Delmail D
Institute of Chemical Sciences of Rennes, University of Rennes 1, Rennes, France.
Labrousse P
University of Limoges, Laboratory of Botany and Cryptogamy, Faculty of Pharmacy of Limoges, Limoges, France.
Ben Abdallah F
Laboratory of Plant Biodiversity and Dynamics of Ecosystems in Arid Area, Faculty of Sciences of Sfax, University of Sfax, Sfax, Tunisia.
Ben Rouina B
Laboratory of Improvement of Olive Productivity and Fruit Trees, Olive Tree Institute of Sfax, Sfax, Tunisia.

MeSH

AntioxidantsBiomassCadmiumCatalaseGlutathioneMineralsOleaOxidation-ReductionOxidative StressPhotosynthesisPlant LeavesPlant RootsProlineSoil PollutantsSuperoxide Dismutase

Pub Type(s)

Journal Article

Language

eng

PubMed ID

26946284

Citation

Zouari, Mohamed, et al. "Impact of Proline Application On Cadmium Accumulation, Mineral Nutrition and Enzymatic Antioxidant Defense System of Olea Europaea L. Cv Chemlali Exposed to Cadmium Stress." Ecotoxicology and Environmental Safety, vol. 128, 2016, pp. 195-205.
Zouari M, Ben Ahmed C, Elloumi N, et al. Impact of proline application on cadmium accumulation, mineral nutrition and enzymatic antioxidant defense system of Olea europaea L. cv Chemlali exposed to cadmium stress. Ecotoxicol Environ Saf. 2016;128:195-205.
Zouari, M., Ben Ahmed, C., Elloumi, N., Bellassoued, K., Delmail, D., Labrousse, P., Ben Abdallah, F., & Ben Rouina, B. (2016). Impact of proline application on cadmium accumulation, mineral nutrition and enzymatic antioxidant defense system of Olea europaea L. cv Chemlali exposed to cadmium stress. Ecotoxicology and Environmental Safety, 128, 195-205. https://doi.org/10.1016/j.ecoenv.2016.02.024
Zouari M, et al. Impact of Proline Application On Cadmium Accumulation, Mineral Nutrition and Enzymatic Antioxidant Defense System of Olea Europaea L. Cv Chemlali Exposed to Cadmium Stress. Ecotoxicol Environ Saf. 2016;128:195-205. PubMed PMID: 26946284.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Impact of proline application on cadmium accumulation, mineral nutrition and enzymatic antioxidant defense system of Olea europaea L. cv Chemlali exposed to cadmium stress. AU - Zouari,Mohamed, AU - Ben Ahmed,Chedlia, AU - Elloumi,Nada, AU - Bellassoued,Khaled, AU - Delmail,David, AU - Labrousse,Pascal, AU - Ben Abdallah,Ferjani, AU - Ben Rouina,Bechir, Y1 - 2016/03/03/ PY - 2015/10/10/received PY - 2016/02/20/revised PY - 2016/02/24/accepted PY - 2016/3/7/entrez PY - 2016/3/8/pubmed PY - 2016/11/5/medline KW - Antioxidant enzymes KW - Cadmium stress KW - Exogenous proline KW - Oil content KW - Olive tree KW - Oxidative stress SP - 195 EP - 205 JF - Ecotoxicology and environmental safety JO - Ecotoxicol Environ Saf VL - 128 N2 - Proline plays an important role in plant response to various environmental stresses. However, its involvement in mitigation of heavy metal stress in plants remains elusive. In this study, we examined the effectiveness of exogenous proline (10 and 20 mM) in alleviating cadmium induced inhibitory effects in young olive plants (Olea europaea L. cv. Chemlali) exposed to two Cd levels (10 and 30 mg CdCl2 kg(-1) soil). The Cd treatment induced substantial accumulation of Cd in both root and leaf tissues and a decrease in gas exchange, photosynthetic pigments contents, uptake of essential elements (Ca, Mg and K) and plant biomass. Furthermore, an elevation of antioxidant enzymes activities (superoxide dismutase, catalase, glutathione peroxydase) and proline content in association with relatively high amounts of hydrogen peroxide, thiobarbituric acid reactive substances and electrolyte leakage were observed. Interestingly, the application of exogenous proline alleviated the oxidative damage induced by Cd accumulation. In fact, Cd-stressed olive plants treated with proline showed an increase of antioxidant enzymes activities, photosynthetic activity, nutritional status, plant growth and oil content of olive fruit. Generally, it seems that proline supplementation alleviated the deleterious effects of young olive plants exposed to Cd stress. SN - 1090-2414 UR - https://www.unboundmedicine.com/medline/citation/26946284/Impact_of_proline_application_on_cadmium_accumulation_mineral_nutrition_and_enzymatic_antioxidant_defense_system_of_Olea_europaea_L__cv_Chemlali_exposed_to_cadmium_stress_ DB - PRIME DP - Unbound Medicine ER -