Comparison of vascular and non-vascular aquatic plant as indicators of cadmium toxicity
Jazyk angličtina Země Anglie, Velká Británie Médium print-electronic
Typ dokumentu časopisecké články
PubMed
28391156
DOI
10.1016/j.chemosphere.2017.04.002
PII: S0045-6535(17)30525-8
Knihovny.cz E-zdroje
- Klíčová slova
- Antioxidants, Aquatic macrophyte, Heavy metals, Mosses, Oxidative stress,
- MeSH
- antioxidancia MeSH
- kadmium toxicita MeSH
- kořeny rostlin metabolismus MeSH
- kyselina askorbová MeSH
- Magnoliopsida metabolismus MeSH
- monitorování životního prostředí metody MeSH
- oxidační stres účinky léků MeSH
- peroxid vodíku MeSH
- sulfhydrylové sloučeniny MeSH
- superoxiddismutasa metabolismus MeSH
- testy toxicity MeSH
- Publikační typ
- časopisecké články MeSH
- Názvy látek
- antioxidancia MeSH
- kadmium MeSH
- kyselina askorbová MeSH
- peroxid vodíku MeSH
- sulfhydrylové sloučeniny MeSH
- superoxiddismutasa 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.
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