Genotoxicity effects of silver nanoparticles on wheat (Triticum aestivum L.) root tip cells.
Ecotoxicol Environ Saf
; 155: 76-85, 2018 Jul 15.
Article
en En
| MEDLINE
| ID: mdl-29510312
ABSTRACT
The distribution and use of nanoparticles have rapidly increased over recent years, but the available knowledge regarding their mode of action, ecological tolerance and biodegradability remains insufficient. Wheat (Triticum aestivum L.) is the most important crop worldwide. In the current study, the effects of silver nanoparticles (AgNPs) obtained from two different sources, namely, green and chemical syntheses, on chromosomal aberrations and cell division were investigated. Wheat root tips were treated with four different AgNP concentrations (10, 20, 40 and 50â¯ppm) for three different exposure durations (8, 16 and 24â¯h), and the different concentrations of the nanoparticles were added to the tested grains until the root lengths reached 1.5-2â¯cm. For each concentration, the mitotic indexes (%) were obtained from an analysis of ~ 2000 cells. The treated root-tip cells exhibited various types of chromosomal aberrations, such as incorrect orientation at metaphase, chromosomal breakage, metaphasic plate distortion, spindle dysfunction, stickiness, aberrant movement at metaphase, fragmentation, scattering, unequal separation, scattering, chromosomal gaps, multipolar anaphase, erosion, and distributed and lagging chromosomes. These results demonstrate that the root tip cells of wheat can readily internalize the AgNPs and that the internalized AgNPs can interfere with the cells' normal function.
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Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Plata
/
Triticum
/
Cromosomas de las Plantas
/
Nanopartículas del Metal
Idioma:
En
Revista:
Ecotoxicol Environ Saf
Año:
2018
Tipo del documento:
Article
País de afiliación:
Egipto