Early-warning biomarkers to assess the exposure to atrazine in sea lamprey downstream migrants. (December 2018)

• Record Type: Journal Article
• Authors: Lança, Maria João; Machado, Maria; Ferreira, Ana Filipa; Carrola, João S.; Quintella, Bernardo R.; Moore, Andrew; Almeida, Pedro R.
• Is Part Of: Ecological indicators. Volume 95(2018)Part 2
• Page Start: 1108
• Page End: 1117
• Publication Date: 2018-12
• Subjects: Petromyzon marinus -- Early-warning biomarkers -- Atrazine -- Fatty acids -- Diadromous species -- Gill cells; Environmental monitoring -- Periodicals; Environmental management -- Periodicals; Environmental impact analysis -- Periodicals; Environmental risk assessment -- Periodicals; Sustainable development -- Periodicals; 333.71405
• DOI: 10.1016/j.ecolind.2017.08.063
• Languages: English
• ISSNs: 1470-160X

Abstract

Highlights: Gills cells characteristics used as early-warning biomarkers. ATZ exposure changed gill cellś BLM phospholipids fatty acid signature. Response induced by ATZ is identical to the one resulting from salinity increase. Abstract: For decades in Portugal, atrazine (2-chloro-4-ethylamino-6-isopropylamino- s -triazine) was one of the most applied herbicide in several crops growth/production and despite being ban in 2007 it is still detected in surface and groundwater. The juvenile sea lamprey may be particularly vulnerable to contaminants such as atrazine as well as others of the group of chloro-s-triazines as it migrates from fresh to the marine environment to start the parasitic phase of the life cycle. This study was carried out to assess if cellular alterations of gill chloride cells and the fatty acid profile of basolateral membrane could be considered as early-warning signals of atrazine presence in the environment. Lampreys were exposed to atrazine at concentrations of 50 and 100 μg/L during acclimation (0–35 PSU) and changes in the structure of gill cells, gill Na + K + ATPase activity and phospholipid fatty acid composition of the basolateral membrane system were monitored. The results shown that observed cellular alterations as well as gill cellś BLM phospholipids fatty acid signature are sensitive to ATZ exposure and could be considered early-warning biomarkers in sea lampreýs juveniles.