Bromodeoxyuridine DNA fiber technology in plants: replication origins and DNA synthesis in tobacco BY-2 cells under prolonged treatment with aphidicolin

Protoplasma
A-H Quélo, J-P Verbelen

Abstract

Newly synthesized DNA can be observed on chromosomes or extended chromatin fibers after incorporation and immunodetection of bromodeoxyuridine. This technique, frequently used in animal cells, was adapted for use in BY-2 cells. For the first time, the origins of replication in plant cells could be visualized and monitored on DNA fibers without the use of radioactive traces. The replicon size for BY-2 cells was estimated to be 12.9 microm; and the fork rate, 1.17 microm/h. These values are comparable to those reported for tomato and mustard cells. Furthermore, the data confirm our previous observation that DNA synthesis is not totally blocked by aphidicolin. Bromodeoxyuridine incorporation into DNA was obvious from 24 h onwards after treatment with aphidicolin.

Citations

Jul 20, 2007·Histochemistry and Cell Biology·Dorota RybaczekJanusz Maszewski
May 16, 2009·Epigenetics & Chromatin·Stephanie M CohenDavid G Kaufman
Jul 19, 2011·Plant Science : an International Journal of Experimental Plant Biology·Celina CostasCrisanto Gutierrez
Nov 26, 2010·Advances in Enzyme Regulation·David G KaufmanPaul D Chastain
Apr 8, 2015·The Plant Journal : for Cell and Molecular Biology·Joana Sequeira-Mendes, Crisanto Gutierrez
Apr 22, 2011·Annals of Botany·John A Bryant, Stephen J Aves

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