Related Experiment Video
Updated: Jul 11, 2026

Vegetated Treatment Systems for Removing Contaminants Associated with Surface Water Toxicity in Agriculture and Urban Runoff
Published on: May 15, 2017
[Bio-toxic effect of pyrene on Vallisneria spiralis]
Ying Yin1, Yuan-Yuan Sun, Hong-Yan Guo
1State Key Laboratory of Pollution Control and Resources Reuse, School of Environment, Nanjing University, Nanjing 210093, China. yinying1978@sohu.com
Abstract:
With indoor static stimulation test, this paper studied the effects of different concentrations (0.01, 0.02, 0.05, 0.07 and 0.1 mg x L(-1)) pyrene on the pyrene accumulation, free radical, antioxidant defenses, and the contents of chlorophyll and soluble sugar in Vallisneria spiralis. The results showed that after 10 days exposure to pyrene, V. spiralis leaf could accumulate large amount of pyrene. The free radical generation, peroxidase (POD) activity and malondialdehyde (MDA) content had a persistent increase, but the increment decreased when exposed to higher concentrations (> 0.05 mg x L(-1) pyrene. Glutathione S-transferase (GST) activity and oxidized glutathione (GSSG) and soluble sugar contents increased with increasing concentration of pyrene, while reduced glutathione (GSH) and chlorophyll contents were in adverse. It was concluded that V. spiralis was sensitive to pyrene, and the stress effect would happen at 0.01 mg x L(-1) of pyrene.
Related Concept Videos
Toxic Reactions: Overview
Toxicity falls into two primary categories: local and systemic.
Local toxicity appears at the exposure site, such as protein denaturation caused by caustic substances.
In contrast, systemic toxicity requires the toxic agent's absorption and distribution,...
Types of Toxins
Air pollutants, primarily gases, pose significant threats to respiratory health, leading to conditions like hypoxia, lung cancer, and in extreme cases, death.
Environmental pollutants like...
Physical Properties of Amines
Anticholinesterase Agents: Poisoning and Treatment
Irreversible agents form a strong bond with the cholinesterase enzyme, making it inactive. The breakdown of the phosphorylated enzyme is slower than the...
Toxicity Testing in Animals

