CaltechAUTHORS
  A Caltech Library Service

Enantiomeric environmental behavior, oxidative stress and toxin release of harmful cyanobacteria Microcystis aeruginosa in response to napropamide and acetochlor

Xie, Jingqian and Zhao, Lu and Liu, Kai and Liu, Weiping (2019) Enantiomeric environmental behavior, oxidative stress and toxin release of harmful cyanobacteria Microcystis aeruginosa in response to napropamide and acetochlor. Environmental Pollution, 246 . pp. 728-733. ISSN 0269-7491. https://resolver.caltech.edu/CaltechAUTHORS:20181218-133506009

Full text is not posted in this repository. Consult Related URLs below.

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20181218-133506009

Abstract

Harmful algal blooms have emerged as a worldwide issue. After concentrations of herbicides entering water, herbicides in water may pose ecological effects on them. The present study investigates the toxicity and environmental behavior of the herbicides, napropamide and acetochlor as enantiomers and as racemates on Microcystis aeruginosa which is the main specie known to produce hepatotoxins. S-napropamide/acetochlor are degraded faster than their corresponding isomer R-napropamide/acetochlor, with the latter more prone to accumulate in algal cells. Moreover, all the enantiomers did not undergo measurable racemization in the medium and algal cells. S-napropamide/acetochlor exhibited much higher toxicity than R-napropamide/acetochlor, with the S-enantiomer inducing a much greater production of antioxidant defense enzymes (superoxide dismutase (SOD) and malondialdehyde (MDA)) and microcystins (MC). SOD and MC increased after treatment with the herbicides and these increases were dependent on the exposure time, whereas MDA showed no apparent change. The information provided in this work will be useful for understanding the toxicity mechanism and environmental behaviors of different amide herbicides (napropamide and acetochlor) in aquatic environments at the enantiomeric level. Additionally, analysis of chiral herbicides in aquatic system needs more attention to aide in the environmental assessment of chiral herbicides.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1016/j.envpol.2018.12.056DOIArticle
ORCID:
AuthorORCID
Liu, Kai0000-0002-2109-8196
Liu, Weiping0000-0002-1173-892X
Additional Information:© 2018 Elsevier Ltd. Received 22 October 2018, Revised 28 November 2018, Accepted 17 December 2018, Available online 18 December 2018. This paper has been recommended for acceptance by Dr. Sarah Harmon.
Funders:
Funding AgencyGrant Number
National Natural Science Foundation of China21320102007
Shanghai Ocean UniversityA2-0203-00-100227
Shanghai Ocean UniversityA2-0203-00-100351
Subject Keywords:napropamide; acetochlor; enantioselectivity; Microcystis aeruginosa; environmental behavior; toxicity mechanism
Record Number:CaltechAUTHORS:20181218-133506009
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20181218-133506009
Official Citation:Jingqian Xie, Lu Zhao, Kai Liu, Weiping Liu, Enantiomeric environmental behavior, oxidative stress and toxin release of harmful cyanobacteria Microcystis aeruginosa in response to napropamide and acetochlor, Environmental Pollution, Volume 246, 2019, Pages 728-733, ISSN 0269-7491, https://doi.org/10.1016/j.envpol.2018.12.056. (http://www.sciencedirect.com/science/article/pii/S026974911834750X)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:91896
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:18 Dec 2018 23:05
Last Modified:03 Oct 2019 20:39

Repository Staff Only: item control page