Effects of Atrazine on Photosynthesis and Defense Response and the Underlying Mechanisms in Phaeodactylum Tricornutum

Overview

Journal Environ Sci Pollut Res Int

Publisher Springer

Specialties Environmental Health
Toxicology

Date 2015 Jul 4

PMID 26139402

Citations 9

Authors

Xiaocui Bai

Chongchong Sun

Jun Xie

Hao Song

Qianqian Zhu

Yiyuan Su

Haifeng Qian

Zhengwei Fu

Affiliations

Soon will be listed here.

Abstract

Atrazine (ATZ) is a commonly used herbicide that has recently come under scrutiny due to potential environmental toxicity and contamination. In this study, we found that the administration of ATZ indeed leads to reduction of photosynthesis and oxidative stress in Phaeodactylum tricornutum at the treated doses higher than 100 μg L(-1) after 48 h. We further explored the effect of ATZ on photosystem II (PSII) and gene expression of electron transport chain. Collectively, our results may suggest that ATZ entered the chloroplasts in alga depending on ATZ's liposolubility and directly attacked on the electron transport chain, especially PSII, contributing to reactive oxygen species (ROS) burst. The increasing ROS could act as signals to induce or disturb the expression of photosynthesis-related genes, resulting in the imbalance of antioxidation and pro-oxidation in the alga.

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