Publication
Title
Metalaxyl effects on antioxidant defenses in leaves and roots of solanum nigrum L.
Author
Abstract
Overuse of pesticides has resulted in environmental problems, threating public health through accumulation in food chains. Phytoremediation is a powerful technique to clean up contaminated environments. However, it is necessary to unravel the metabolic mechanisms underlying phytoremediation in order to increase the efficiency of this process. Therefore, growth, physiological and biochemical responses in leaves and roots of Solanum nigrum L. exposed to the commonly used fungicide metalaxyl were investigated. This species shows characteristics that make it valuable as a potential tool for the remediation of organic pollutants. We found that once inside the plant, metalaxyl altered carbon metabolism, which resulted in a reduction of growth and lower biomass accumulation due to impairment of carbohydrate production (total soluble sugar, starch, rubisco) and increased photorespiration (glycolate oxidase, Gly/Ser ratio). A significant increase of antioxidant defenses (polyphenols, flavonoids, tocopherols, ascorbate, glutathione, superoxide dismutase, catalase, peroxidases, monodehydroascorbate-and dehydroascorbate reductase, gluthatione reductase) kept reactive oxygen species (ROS) levels under control (superoxide anion) leaving cell membranes undamaged. The results suggest that enhancing carbon assimilation and antioxidant capacity may be target parameters to improve this species' phytoremediation capacities. Highlights Metalaxyl inhibits growth by reducing photosynthesis and inducing photorespiration Elevated antioxidant defenses protect metalaxyl-treated plants from oxidative damage Ascorbate and glutathione are key antioxidants in metalaxyl tolerance.
Language
English
Source (journal)
Frontiers in plant science. - Place of publication unknown
Publication
Place of publication unknown : publisher unknown , 2017
ISSN
1664-462X
DOI
10.3389/FPLS.2017.01967
Volume/pages
8 (2017) , 13 p.
Article Reference
1967
ISI
000416511100001
Medium
E-only publicatie
Full text (Publisher's DOI)
Full text (open access)
UAntwerpen
Faculty/Department
Research group
Project info
Aluminum toxicity in plants, understanding responses to aluminum in sensitive and tolerant rye genotypes
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identifier
Creation 21.12.2017
Last edited 04.03.2024
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