Comparison of vascular and non-vascular aquatic plant as indicators of cadmium toxicity
Language English Country England, Great Britain Media print-electronic
Document type Journal Article
PubMed
28391156
DOI
10.1016/j.chemosphere.2017.04.002
PII: S0045-6535(17)30525-8
Knihovny.cz E-resources
- Keywords
- Antioxidants, Aquatic macrophyte, Heavy metals, Mosses, Oxidative stress,
- MeSH
- Antioxidants MeSH
- Cadmium toxicity MeSH
- Plant Roots metabolism MeSH
- Ascorbic Acid MeSH
- Magnoliopsida metabolism MeSH
- Environmental Monitoring methods MeSH
- Oxidative Stress drug effects MeSH
- Hydrogen Peroxide MeSH
- Sulfhydryl Compounds MeSH
- Superoxide Dismutase metabolism MeSH
- Toxicity Tests MeSH
- Publication type
- Journal Article MeSH
- Names of Substances
- Antioxidants MeSH
- Cadmium MeSH
- Ascorbic Acid MeSH
- Hydrogen Peroxide MeSH
- Sulfhydryl Compounds MeSH
- Superoxide Dismutase MeSH
Antioxidative and microscopic responses in non-vascular (moss Taxiphyllum barbieri) and vascular (Ceratophyllum demersum) aquatic plants exposed to short-term (24 h) cadmium (Cd) excess (10 and 100 μM) were compared. Ceratophyllum considerably accumulated Cd but less pronounced symptoms of oxidative stress were detected by confocal microscopy (at the level of general ROS, hydrogen peroxide, hydroxyl radical/peroxynitrite and superoxide) that could be related to enhanced activities of antioxidative enzymes (SOD, CAT, APX). Amounts of ascorbic acid and non-protein thiols were higher in Ceratophyllum than in Taxiphyllum and increased with increasing Cd dose, which may help to better regulate circulation of free metal ions in Ceratophyllum mainly. Besides, it was observed that citric acid increased in Ceratophyllum while malic acid in Taxiphyllum in response to Cd which may also contribute to Cd chelation. Our data indicate that Ceratophyllum is a suitable species for Cd bioaccumulation while Taxiphyllum is more sensitive to Cd excess and thus suitable as indicator species. It was also proven that sensitive microscopic techniques allow the visualization of Cd-induced changes in aquatic plants even after short-term exposure when no morphological signs of damage are visible.
References provided by Crossref.org
Metabolic and Oxidative Changes in the Fern Adiantum raddianum upon Foliar Application of Metals
Nitrogen nutrition modulates oxidative stress and metabolite production in Hypericum perforatum
