EFFECTS OF Mg2+ AND Co2+ ON CELL DIVISION AND NUCLEOLAR CYCLE DURING MITOSIS IN ROOT TIP CELLS OF ALLIUM CEPA

1994 ◽  
Vol 42 (3) ◽  
pp. 235-243 ◽  
Author(s):  
Donghua Liu ◽  
Wusheng Jiang ◽  
Shuming Tong ◽  
Lin Zhai
Keyword(s):  
Cell Division ◽  
Allium Cepa ◽  
Magnesium Sulphate ◽  
Root Tip ◽  
Anaphase Bridges ◽  
Chromosome Stickiness ◽  
Nucleolar Cycle ◽  
Tip Cells ◽  
Root Tip Cells ◽  
Cobaltous Nitrate

Effects of Mg2+ and Co2+ on cell division and the nucleolar cycle during mitosis in root tip cells of Allium cepa were studied. The concentrations used of magnesium sulphate and cobaltous nitrate were in the range of 10−7–10−1M. The results showed that both Mg and Co can, at higher concentration, have a toxic effect on cell division comprising c-mitosis and lagging chromosomes, anaphase bridges, and chromosome stickiness. Excessive Mg and Co can also induce some silver-stained particles similar to nucleoli, which are scattered around the chromosome or in the cytoplasm during metaphase and anaphase. The possible mechanism behind this phenomenon is briefly discussed.

EFFECTS OF PB2+ ON ROOT GROWTH, CELL DIVISION, AND NUCLEOLUS OF BRASSICA JUNCEA L.

1999 ◽  
Vol 47 (3) ◽  
pp. 153-156 ◽  
Author(s):  
Wusheng Jiang ◽  
Donghua Liu
Keyword(s):  
Cell Division ◽  
Root Growth ◽  
Brassica Juncea ◽  
Lead Nitrate ◽  
Inhibitory Effect ◽  
Toxic Effects ◽  
Root Tip ◽  
Anaphase Bridges ◽  
Tip Cells ◽  
Root Tip Cells

The effects of different concentrations (10−5-10−2M) of lead nitrate on root growth and nucleoli in root tip cells of Brassica juncea L. were investigated. The results showed that lead nitrate has a stimulatory effect on root growth at lower concentrations, and an inhibitory effect at higher concentrations. Pb has toxic effects on chromosomal morphology, including c-mitosis and anaphase bridges, and on nucleoli, causing some particulate silver-stained material scattered in the nuclei and inducing irregularly shaped nucleoli. Once the nucleolus was affected, the root growth almost or completely stopped.

scholarly journals Effects of cadmium on root growth, cell division and micronuclei formation in root tip cells of Allium cepa var. agrogarum L.

Phyton ◽  
2014 ◽  
Vol 83 (1) ◽  
pp. 291-298
Author(s):  
Wang QL ◽  
LT Zhang ◽  
JH Zou ◽  
DH Liu ◽  
JY Yue
Keyword(s):  
Cell Division ◽  
Root Growth ◽  
Allium Cepa ◽  
Root Tip ◽  
Tip Cells ◽  
Root Tip Cells

Sunlight decreased genotoxicity of azadirachtin on root tip cells of Allium cepa and Eucrosia bicolor

2010 ◽  
Vol 73 (5) ◽  
pp. 949-954 ◽  
Author(s):  
W. Kwankua ◽  
S. Sengsai ◽  
C. Kuleung ◽  
N. Euawong
Keyword(s):  
Allium Cepa ◽  
Root Tip ◽  
Tip Cells ◽  
Root Tip Cells

Cytotoxicity of Spent Pot Liner on Allium cepa root tip cells: A comparative analysis in meristematic cell type on toxicity bioassays

2016 ◽  
Vol 133 ◽  
pp. 442-447 ◽  
Author(s):  
Marcel José Palmieri ◽  
Larissa Fonseca Andrade-Vieira ◽  
José Marcello Salabert Campos ◽  
Leonardo dos Santos Gedraite ◽  
Lisete Chamma Davide
Keyword(s):  
Comparative Analysis ◽  
Allium Cepa ◽  
Meristematic Cell ◽  
Root Tip ◽  
Cell Type ◽  
Tip Cells ◽  
Root Tip Cells
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