Arsenic-induced oxidative stress in Brassica oleracea: Multivariate and literature data analyses of physiological parameters, applied levels and plant organ type.

Autor: Natasha; Department of Environmental Sciences, COMSATS University Islamabad, Vehari, Campus-61100, Pakistan., Shahid M; Department of Environmental Sciences, COMSATS University Islamabad, Vehari, Campus-61100, Pakistan. muhammadshahid@ciitvehari.edu.pk., Khalid S; Department of Environmental Sciences, COMSATS University Islamabad, Vehari, Campus-61100, Pakistan., Bibi I; Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad, Faisalabad, 38040, Pakistan., Khalid S; Department of Environmental Sciences, COMSATS University Islamabad, Vehari, Campus-61100, Pakistan., Masood N; Department of Environmental Sciences, COMSATS University Islamabad, Vehari, Campus-61100, Pakistan., Qaisrani SA; Department of Environmental Sciences, COMSATS University Islamabad, Vehari, Campus-61100, Pakistan., Niazi NK; Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad, Faisalabad, 38040, Pakistan.; School of Civil Engineering and Surveying, University of Southern Queensland, Toowoomba, Queensland, 4350, Australia., Dumat C; Centre d'Etude et de Recherche Travail Organisation Pouvoir (CERTOP), UMR5044, Université J. Jaurès - Toulouse II, 5 allée Machado A, 31058cedex 9, Toulouse, France.; Université de Toulouse, INP-ENSAT, Avenue de l'Agrobiopole, 31326, Auzeville-Tolosane, France.
Jazyk: angličtina
Zdroj: Environmental geochemistry and health [Environ Geochem Health] 2022 Jun; Vol. 44 (6), pp. 1827-1839. Date of Electronic Publication: 2021 Sep 15.
DOI: 10.1007/s10653-021-01093-9
Abstrakt: Plant redox homeostasis governs the uptake, toxicity and tolerance mechanism of toxic trace elements and thereby elucidates the remediation potential of a plant. Moreover, plant toxicity/tolerance mechanisms control the trace element compartmentation in edible and non-edible plant organs as well as the associated health hazards. Therefore, it is imperative to unravel the cellular mechanism involved in trace element toxicity and tolerance. The present study investigated the toxicity and tolerance/detoxification mechanisms of four levels of arsenic (As(III): 0, 5, 25 and 125 µM) in Brassica oleracea under hydroponic cultivation. Increasing As levels significantly decreased the pigment contents (up to 68%) of B. oleracea. Plants under As stress showed an increase in H 2 O 2 contents (up to 32%) in roots while a decrease (up to 72%) in leaves because As is mostly retained in plant roots, while less is translocated toward the shoot, as evident from the literature. Arsenic treatments caused lipid peroxidation both in the root and leaf cells. Against As-induced oxidative stress, B. oleracea plants mediated an increase in the activities of peroxidase and catalase. Contradictory, the ascorbate peroxidase and superoxide dismutase activities slightly decreased in the As-stressed plants. In conclusion and as evident from the literature data analysis, As exposure (especially high level, 125 µM) caused pigment toxicity and oxidative burst in B. oleracea. The ability of B. oleracea to tolerate As-induced toxicity greatly varied with applied treatment levels (As-125 being more toxic than lower levels), plant organ type (more toxicity in leaves than roots) and physiological response parameter (pigment contents more sensitive than other response variables). Moreover, the multivariate statistical analysis appeared to be a useful method to estimate plant response under stress and trace significant trends in the data set.
(© 2021. The Author(s), under exclusive licence to Springer Nature B.V.)
Databáze: MEDLINE
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