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Publication Type J
Authors Bouslimi, H., R. Ferreira, N. Dridi, P. Brito, S. Martins-Dias, I. Cacador and N. Sleimi
Title Effects of Barium Stress in Brassica juncea and Cakile maritima: The Indicator Role of Some Antioxidant Enzymes and Secondary Metabolites
Source Phyton-International Journal of Experimental Botany
Author Keywords Brassica juncea Cakile maritima antioxidant enzymes barium stress oxidative stress secondary metabolites phenolic-compounds oxidative stress photosynthetic attributes heavy-metals ho 1 cadmium l. accumulation tolerance defense
Abstract Soil contamination by toxic trace metal elements, like barium (Ba), may stimulate various undesirable changes in the metabolic activity of plants. The plant responses are fast and with, direct or indirect, generation of reactive oxygen species (ROS). To cope with the stress imposed by the ROS production, plants developed a dual cellular system composed of enzymatic and non-enzymatic players that convert ROS, and their by-products, into stable nontoxic molecules. To assess the Ba stress response of two Brassicaceae species (Brassica juncea, a glycophyte, and Cakile maritime, a halophyte), plants were exposure to different Ba concentrations (0, 100, 200, 300 and 500 mu M). The plants response was evaluated through their morphology and development, the determination of plant leaves antioxidant enzymatic activities and by the production of plants secondary metabolites. Results indicated that the two Brassicaceae species have the ability to survive in an environment containing Ba (even at 500 mu M). The biomass production of C. maritima was slightly affected whereas an increase in biomass B. juncea was noticed. The stress imposed by Ba activated the antioxidant defense system in the two species, noticed by the changes in the leaves activity of catalase (CAT), ascorbate peroxidase (APX) and guaicol peroxidase (GPX), and of the secondary metabolites, through the production of total phenols and flavonoids. The enzymatic response was not similar within the two plant species: CAT and APX seem to have a more important role against the oxidative stress in C. maritima while in B. juncea is GPX. Overall, total phenols and flavonoids production was more significant in the plants aerial part than in the roots, of the both species. Although the two Brassicaceae species response was different, in both plants catalytic and non-catalytic transformation of ROS occurs, and both were able to overcome the Ba toxicity and prevent the cell damage.
Author Address [Bouslimi, Houda; Dridi, Nesrine; Sleimi, Noomene] Univ Carthage, Fac Sci Bizerte, Lab Resources Mat & Ecosyst, Jarzouna 7021, Bizerte, Tunisia. [Ferreira, Renata] Univ Lisbon, Ctr Recursos Nat & Ambiente, Inst Super Tecn, P-1049001 Lisbon, Portugal. [Brito, Pedro] Inst Portugues Mare Atmosfera, Rua Dr Alfredo Magalhaes Ramatho, P-1495006 Lisbon, Portugal. [Martins-Dias, Susete] Univ Lisbon, Ctr Recursos Nat & Ambiente, Inst Super Tecn, DBE, P-1049001 Lisbon, Portugal. [Cacador, Isabel] Univ Lisbon, Fac Ciencias, Marine & Environm Sci Ctr, P-1749016 Lisbon, Portugal. Sleimi, N (corresponding author), Univ Carthage, Fac Sci Bizerte, Lab Resources Mat & Ecosyst, Jarzouna 7021, Bizerte, Tunisia. noomene.sleimi@gmail.com
ISSN 0031-9457
ISBN 0031-9457
29-Character Source Abbreviation Phyton-Int. J. Exp. Bot.
Year Published 2021
Volume 90
Issue 1
Beginning Page 145-158
Digital Object Identifier (DOI) 10.32604/phyton.2020.011752
Unique Article Identifier WOS:000592688600011

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