Impacts of Fulvic Acid on the Toxicity of the Herbicide Atrazine to Lemna minor.
Bioavailability
Dissolved organic carbon (DOC)
Growth rate
Herbicide
Yield
Journal
Bulletin of environmental contamination and toxicology
ISSN: 1432-0800
Titre abrégé: Bull Environ Contam Toxicol
Pays: United States
ID NLM: 0046021
Informations de publication
Date de publication:
17 May 2024
17 May 2024
Historique:
received:
29
01
2024
accepted:
30
04
2024
medline:
17
5
2024
pubmed:
17
5
2024
entrez:
17
5
2024
Statut:
epublish
Résumé
Fulvic acids (FA) are environmentally prevalent components of dissolved organic carbon. Little research has evaluated their potential influence on the bioavailability of herbicides to non-target aquatic plants. This study evaluated the potential impacts of FA on the bioavailability of atrazine (ATZ) to the aquatic plant Lemna minor. Plants were exposed to 0, 15, 30, 60, 125, and 750 µg/L ATZ in media containing three FA concentrations (0, 5, and 15 mg/L) in a factorial study under static conditions. Fronds were counted after 7- and 14-days exposure and intrinsic growth rates (IGR) and total frond yields were calculated for analysis. Atrazine NOAECs and LOAECs within each FA treatment series (0, 5, or 15 mg/L) were identified and EC50s were estimated. NOAEC/LOAECs for yield and IGR were 60/125 µg/L except for yield in the 0 mg/L-FA series (30/60) and IGR in the 5 mg/L-FA series (30/60). NOAEC/LOAECs were 30/60 µg/L for all treatments and both endpoints after 14 days exposure. EC50s ranged from 88.2 to 106.1 µg/L (frond production 7 DAT), 158.0-186.0 µg/L (IGR, 7 DAT), 74.7-86.3 µg/L (frond production, 14 DAT), and 144.1-151.3 µg/L (IGR, 14 DAT). FA concentrations did not influence the toxicity of ATZ.
Identifiants
pubmed: 38758236
doi: 10.1007/s00128-024-03902-0
pii: 10.1007/s00128-024-03902-0
doi:
Substances chimiques
fulvic acid
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
77Informations de copyright
© 2024. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.
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