2018
Short-term assessment of cadmium toxicity and uptake from different types of Cd-based Quantum Dots in the model plant Allium cepa L.
MODLITBOVÁ, Pavlína, Pavel POŘÍZKA, Karel NOVOTNÝ, Jana DRBOHLAVOVÁ, Ivana CHAMRADOVÁ et. al.Základní údaje
Originální název
Short-term assessment of cadmium toxicity and uptake from different types of Cd-based Quantum Dots in the model plant Allium cepa L.
Autoři
MODLITBOVÁ, Pavlína (203 Česká republika), Pavel POŘÍZKA (203 Česká republika), Karel NOVOTNÝ (203 Česká republika, domácí), Jana DRBOHLAVOVÁ (203 Česká republika), Ivana CHAMRADOVÁ (203 Česká republika), Zdeněk FARKA (203 Česká republika, garant, domácí), Helena ZLÁMALOVÁ-GARGOŠOVÁ (203 Česká republika), Tea ROMIH (705 Slovinsko) a Jozef KAISER (203 Česká republika)
Vydání
Ecotoxicology and Environmental Safety, Elsevier, 2018, 0147-6513
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10406 Analytical chemistry
Stát vydavatele
Nizozemské království
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 4.527
Kód RIV
RIV/00216224:14740/18:00102255
Organizační jednotka
Středoevropský technologický institut
UT WoS
000427808700004
Klíčová slova anglicky
Allium cepa L.; Bioaccumulation; Cadmium; Differential pulse voltammetry; Fluorescence microscopy; Phytotoxicity; Quantum dots
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 19. 3. 2019 09:08, Mgr. Pavla Foltynová, Ph.D.
Anotace
V originále
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.
Návaznosti
LM2015043, projekt VaV |
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LQ1601, projekt VaV |
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