A different sequence of events than previously reported leads to arsenic-induced damage in Ceratophyllum demersum L.
نویسندگان
چکیده
منابع مشابه
A different sequence of events than previously reported leads to arsenic-induced damage in Ceratophyllum demersum L.
Arsenic (As) is a common pollutant, and still many questions remain concerning As toxicity mechanisms under environmentally relevant conditions in plants. Here we investigated thresholds and interactions of various proposed As toxicity mechanisms. Experiments were done under environmentally pertinent conditions in the rootless aquatic macrophyte Ceratophyllum demersum L., a model for plant shoo...
متن کاملArsenic accumulation and speciation in the submerged macrophyte Ceratophyllum demersum L.
INTRODUCTION Ceratophyllum demersum L. is a widespread submerged macrophyte in aquatic environments. METHODS Simulation experiments were conducted in the laboratory to investigate arsenic (As) accumulation, speciation, and efflux of C. demersum exposed to arsenate and arsenite solutions. RESULTS Plant shoots showed a significant accumulation of As with a maximum of 862 and 963 μg As g(-1) d...
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Recent studies have identified rice (Oryza sativa) as a major dietary source of inorganic arsenic (As) and poses a significant human health risk. The predominant model for plant detoxification of heavy metals is complexation of heavy metals with phytochelatins (PCs), synthesized non-translationally by PC synthase (PCS) and compartmentalized in vacuoles. In this study, in order to restrict As in...
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The heavy metal cadmium (Cd) is highly toxic to plants. To understand the mechanisms of tolerance and resistance to Cd, we treated the rootless, submerged macrophyte Ceratophyllum demersum L. with sub-micromolar concentrations of Cd under environmentally relevant conditions. X-ray fluorescence measurements revealed changing distribution patterns of Cd and Zn at non-toxic (0.2 nM, 2 nM), moderat...
متن کاملAnalysis of sublethal arsenic toxicity to Ceratophyllum demersum: subcellular distribution of arsenic and inhibition of chlorophyll biosynthesis
Arsenic (As) pollution is a serious concern worldwide. Recent studies under environmentally relevant conditions revealed that, in the aquatic plant Ceratophyllum demersum, pigments are the first observable target of toxicity, prior to any effect on photosynthetic parameters or to oxidative stress. Lethal toxicity was initiated by a change of As species and their distribution pattern in various ...
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ژورنال
عنوان ژورنال: Metallomics
سال: 2014
ISSN: 1756-5901,1756-591X
DOI: 10.1039/c3mt00317e