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@article{1406195,
author = {Modlitbová, Pavlína and Pořízka, Pavel and Novotný, Karel and Drbohlavová, Jana and Chamradová, Ivana and Farka, Zdeněk and ZlámalováandGargošová, Helena and Romih, Tea and Kaiser, Jozef},
article_number = {MAY},
doi = {http://dx.doi.org/10.1016/j.ecoenv.2018.01.044},
keywords = {Allium cepa L.; Bioaccumulation; Cadmium; Differential pulse voltammetry; Fluorescence microscopy; Phytotoxicity; Quantum dots},
language = {eng},
issn = {0147-6513},
journal = {Ecotoxicology and Environmental Safety},
title = {Short-term assessment of cadmium toxicity and uptake from different types of Cd-based Quantum Dots in the model plant Allium cepa L.},
url = {https://www.sciencedirect.com/science/article/pii/S0147651318300538},
volume = {153},
year = {2018}
}
TY - JOUR
ID - 1406195
AU - Modlitbová, Pavlína - Pořízka, Pavel - Novotný, Karel - Drbohlavová, Jana - Chamradová, Ivana - Farka, Zdeněk - Zlámalová-Gargošová, Helena - Romih, Tea - Kaiser, Jozef
PY - 2018
TI - Short-term assessment of cadmium toxicity and uptake from different types of Cd-based Quantum Dots in the model plant Allium cepa L.
JF - Ecotoxicology and Environmental Safety
VL - 153
IS - MAY
SP - 23-31
EP - 23-31
PB - Elsevier
SN - 01476513
KW - Allium cepa L.
KW - Bioaccumulation
KW - Cadmium
KW - Differential pulse voltammetry
KW - Fluorescence microscopy
KW - Phytotoxicity
KW - Quantum dots
UR - https://www.sciencedirect.com/science/article/pii/S0147651318300538
N2 - We report on the toxicity and bioaccumulation of three different types of Cd-based quantum dots (QDs), dispersed in aqueous medium, for a model plant Allium cepa L. It is believed that encapsulation of nanoparticles should reduce their toxicity and increase their stability in different environments; in this work we studied how QD encapsulation affects their phytotoxicity. Core, core/shell, and core/shell/shell QDs (CdTe, CdTe/ZnS, and CdTe/CdS/ZnS QDs capped by 2-mercaptopropionic acid) were tested and CdCl2 was used as a positive control. After 24-h and 72-h exposure, total Cd content (MCd) and bioaccumulation factors (BAFs) were determined in all parts of A. cepa plants (roots, bulb, shoot), and the total length of the root system was monitored as a toxicity end-point. Measurements of total Cd content versus free Cd2+ content (with Differential Pulse Voltammetry, DPV) in exposure media showed differences in chemical stability of the three QD types. Correspondingly, selected QDs showed different toxicity for A. cepa and different Cd bioaccumulation patterns. CdTe QDs were the most toxic; their effect was similar to CdCl2 due to the release of free Cd2+, which was confirmed by the DPV measurements. Plants exposed to CdTe QDs also bioaccumulated the most Cd among all QD exposure groups. CdTe/ZnS QDs showed no toxicity and very low bioaccumulation of Cd in A. cepa; the main source of measured Cd in the plants were QDs adsorbed on their roots, which was confirmed by fluorescence microscopy. On the contrary, CdTe/CdS/ZnS QD toxicity and bioaccumulation patterns were similar to those of CdTe QDs and pointed to unstable CdS/ZnS shells.
ER -
MODLITBOVÁ, Pavlína, Pavel POŘÍZKA, Karel NOVOTNÝ, Jana DRBOHLAVOVÁ, Ivana CHAMRADOVÁ, Zdeněk FARKA, Helena ZLÁMALOVÁ-GARGOŠOVÁ, Tea ROMIH and Jozef KAISER. Short-term assessment of cadmium toxicity and uptake from different types of Cd-based Quantum Dots in the model plant Allium cepa L. \textit{Ecotoxicology and Environmental Safety}. Elsevier, 2018, vol.~153, MAY, p.~23-31. ISSN~0147-6513. Available from: https://dx.doi.org/10.1016/j.ecoenv.2018.01.044.
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