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Title: | Short-term phytotoxicity in Brassica napus (L.) in response to pre-emergently applied metazachlor: A microcosm study | Authors: | VERCAMPT, Hanne Koleva, Lyubka Vassilev, Andon VANGRONSVELD, Jaco CUYPERS, Ann |
Issue Date: | 2017 | Publisher: | WILEY-BLACKWELL | Source: | ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY, 36(1), p. 59-70 | Abstract: | In accordance with realistic application approaches, a short-term 1-factorial experiment was set up to investigate the phytotoxic impact of pre-emergent application of the chloroacetamide herbicide metazachlor on Brassica napus. In addition to morphological parameters, the underlying processes that ultimately determine the extent of herbicide-induced phytotoxicity (i.e., herbicide metabolization and cellular antioxidant defense) were examined. The present study demonstrated that metazachlor provoked fasciation of the leaves closely after emergence, which might be linked to its mode of action whereby cell division is impaired through the inhibition of very long chain fatty acid synthesis. The increased activities of antioxidative enzymes and metabolites in leaf tissue indicated the presence of reactive oxygen species under the influence of metazachlor. This resulted in oxidative damage in the form of membrane lipid peroxidation. Simultaneously, the increased activity of glutathione S-transferase and the shift in glutathione redox state suggested activation of the detoxification metabolism. This occurred, however, at the expense of growth, with a temporary reduction in plant height and weight after application. The results indicated that metazachlor disappeared within 3 mo to 4 mo after application, which resulted in the recovery of the crop. In conclusion, metazachlor induces phytotoxicity in the short term, either directly through its mode of action or indirectly through the induction of oxidative stress, which resulted in a temporary reduction in growth. Environ Toxicol Chem 2017;36:59-70. (c) 2016 SETAC | Notes: | [Vercampt, Hanne; Vangronsveld, Jaco; Cuypers, Ann] Hasselt Univ, Ctr Environm Sci, Diepenbeek, Belgium. [Koleva, Lyubka; Vassilev, Andon] Agr Univ Plovdiv, Dept Plant Physiol & Biochem, Plovdiv, Bulgaria. | Keywords: | brassica napus; metazachlor; phytotoxicity; stress response; toxic effect;Brassica napus; Metazachlor; Phytotoxicity; Stress response; Toxic effect | Document URI: | http://hdl.handle.net/1942/23281 | ISSN: | 0730-7268 | e-ISSN: | 1552-8618 | DOI: | 10.1002/etc.3538 | ISI #: | 000391029800010 | Rights: | (c) 2016 SETAC | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2018 |
Appears in Collections: | Research publications |
Files in This Item:
File | Description | Size | Format | |
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Vercamptetal2017EnvironmentalToxicologyandChemistry.pdf Restricted Access | Published version | 2.15 MB | Adobe PDF | View/Open Request a copy |
ET&C_Vercampt_et_al_Tables_25_5_16.pdf | Supplementary material | 404.14 kB | Adobe PDF | View/Open |
ET&C_Vercampt_et_al_Figures_25_5_16.pdf | Supplementary material | 988.68 kB | Adobe PDF | View/Open |
ET_C_Vercampt_et_al_MANUSCRIPT_25_5_16.pdf | Peer-reviewed author version | 597.96 kB | Adobe PDF | View/Open |
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