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Endoplasmic reticulum preprophase band in dividing root-tip cells of Pinus brutia

M. Zachariadis, H. Quader, B. Galatis and P. Apostolakos
Planta
Vol. 213, No. 5 (September 2001), pp. 824-827
Published by: Springer
Stable URL: http://www.jstor.org/stable/23386405
Page Count: 4
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Endoplasmic reticulum preprophase band in dividing root-tip cells of Pinus brutia
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Abstract

In dividing root-tip cells of Pinus brutia Ten., immunolocalization of the luminal endoplasmic reticulum (ER) proteins, which have the C-terminal HDEL sequence, reveals that the ER is reorganized during the preprophase/prophase stage. Portions of ER were arrayed into a ring-like structure at the site of the microtubule preprophase band (Mt-PPB). This preprophase ER band (ER-PPB) resembles that of the Mt-PPB. The former undergoes a maturation process closely similar to that of the latter. Our data show that the PPB region has a more complex organization than is currently believed. The probable function (s) of the ER-PPB is discussed.

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