Consulta: creatorFacets:"Liu,DH"
Registros recuperados: 3
Data/hora: 06/06/2024 00:33:31

Effects of cadmium on root growth, cell division and micronuclei formation in root tip cells of Allium cepa var. agrogarum L
Provedor de dados: 85
Autores: Wang,QL; Zhang,LT; Zou,JH; Liu,DH; Yue,JY.
The effects of various cadmium (Cd) concentrations (10, 50 and 100 &amp;#956;M) on root growth, cell division and micronuclei formation in root tip cells of Allium cepa var. agrogarum L. were investigated to better understand the processes of Cd-induced apoptosis. The results indicated that 10 &amp;#956;M of Cd had an obviously passive influence on root growth during the 24 h treatment, and that the influence was even more serious with increasing Cd concentrations and duration of treatments. The mitotic index decreased with increasing Cd concentration and duration of treatments. Cadmium induced c-mitosis, chromosome bridges, chromosome stickiness and micronuclei. The frequency of cells with these disorders varied with prolonging the duration of treatments...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allium cepa var. agrogarum L; Cadmium (Cd); Chromosome disorder; Micronuclei.
Ano: 2014
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572014000200009

The uptake of cadmium by Allium cepa var. agrogarum L. and its effects on chromosome and nucleolar behavior in root tip cells
Provedor de dados: 85
Autores: Wang,QL; Liu,DH; Yue,JY.
Allium cepa var. agrogarum L. seedlings are sensitive to Cd stress. We used fluorescence imaging to indicate that Cd2+ was localized in cytoplasm in the epidermis of the basal parts of root and vascular tissues after Cd treatment. The nucleoli and the cell walls were the first storage sites of Cd2+. When Cd exposure was prolonged, severe irregularly-shaped nuclei were induced. We used silver nitrate staining to analyze the effects of different concentrations (1-300 µM) of cadmium chloride on chromosome, nucleolus and nucleolus organizer regions (NORs) in root tip cells. Cd2+ induced c-mitosis, chromosome bridges, chromosome stickiness and micronuclei. More than 100 µM Cd2+ could induce nucleolar material extruded from the nucleus into the cytoplasm. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cadmium (Cd); Allium cepa var. agrogarum L; Chromosome aberration; Nucleoli; Nucleolar organizing region; Autophagy.
Ano: 2016
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572016000100021

Physiological responses of Allium cepa var. agrogarum L. plants to Cadmium stress
Provedor de dados: 85
Autores: Wang,QL; Liu,DH; Yue,JY.
This study aimed to determine the effects of different Cd concentrations (0, 1, 10, 100, and 300 µM CdCl2) on Allium plantlets. To achieve this goal, we examined the (1) dynamics of Cd2+ fux in the rhizosphere, (2) partitioning of Cd between roots and leaves, (3) formation of reactive oxygen species (ROS), (4) levels of H2O2 and chlorophyll, and (5) translocation of several macro- and micronutrients. A strong net Cd2+ influx was observed in the root apex after exposure to 100 µM Cd for 24 h. Exposure to either 1 or 10 µM Cd for 96 h presented no evident influence on root growth. However, treatments with 100 to 300 µM Cd for 72 h significantly inhibited root growth. ROS levels increased in roots and leaves with increasing Cd concentrations. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cadmium (Cd) toxicity; Net cadmium flux; ICP; Oxidative stress; Photosynthesis.
Ano: 2016
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572016000200015