root meristematic cell
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2015 ◽  
Vol 10 (3) ◽  
pp. e990801 ◽  
Author(s):  
Yoko Nishizawa ◽  
Susumu Mochizuki ◽  
Hanae Koiwai ◽  
Katsuhiko Kondo ◽  
Kyutaro Kishimoto ◽  
...  

2015 ◽  
Vol 46 (4) ◽  
pp. 701-711
Author(s):  
H. Habdas

Hydroxyurea treatment of onion roots induced mitotic block which was released by transfer of bulbs to water, and also to some extent by addition of cold or <sup>3</sup>H-thymidine to hydroxyurea solutions. In presence of hydroxyurea there was noted very intense incorporation of <sup>3</sup>H-thymidine into cell nuclei, giving labelling index of 40-70%. However, all the mitotic figures appearing in presence of hydroxyurea and <sup>3</sup>H-thymidine were unlabelled. On the other hand, labelled mitotic figures were obtained when roots incubated with <sup>3</sup>H-thymidine in presence of hydroxyurea had been transferred to water. Incorporation of <sup>3</sup>H-uridine was unaffected by hydroxyurea. The results show that hydroxyurea arrests onion root meristematic cells, either in the S phase and the G<sub>2</sub> phase. Enhanced incorporation of <sup>3</sup>H-thymidine in the presence of hydroxyurea, and release by added thymidine of the mitotic block indicate that hydroxyurea induces in onion root meristematic cells a particular shortage of thymidylate.


PROTOPLASMA ◽  
2010 ◽  
Vol 248 (2) ◽  
pp. 353-361 ◽  
Author(s):  
Łucja Balcerzak ◽  
Sława Glińska ◽  
Mirosław Godlewski

1992 ◽  
Vol 200 (2) ◽  
pp. 431-438 ◽  
Author(s):  
G.H. Vázquez-Nin ◽  
O.M. Echeverría ◽  
A. Mínguez ◽  
S.Moreno Díaz de la Espina ◽  
S. Fakan ◽  
...  

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