Journal
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 22, Issue 22, Pages 17499-17507Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-015-4923-7
Keywords
Phaeodactylum tricornutum; ATZ; Real-time PCR; Electron transport
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Funding
- Program for Natural Science Foundation of China [21277125]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT13096]
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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 mu g 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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