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Bioessays. 2003 Jun;25(6):569-76.

The architecture of polarized cell growth: the unique status of elongating plant cells.

Author information

1
Institute of Botany, Department of Plant Cell Biology, Rheinische Friedrich-Wilhelms-University of Bonn, 53115 Bonn, Germany. baluska@uni-bonn.de

Abstract

Polarity is an inherent feature of almost all prokaryotic and eukaryotic cells. In most eukaryotic cells, growth polarity is due to the assembly of actin-based growing domains at particular locations on the cell periphery. A contrasting scenario is that growth polarity results from the establishment of non-growing domains, which are actively maintained at opposite end-poles of the cell. This latter mode of growth is common in rod-shaped bacteria and, surprisingly, also in the majority of plant cells, which elongate along the apical-basal axes of plant organs. The available data indicate that the non-growing end-pole domains of plant cells are sites of intense endocytosis and recycling. These actin-enriched end-poles serve also as signaling platforms, allowing bidirectional exchange of diverse signals along the supracellular domains of longitudinal cell files. It is proposed that these actively remodeled end-poles of elongating plant cells remotely resemble neuronal synapses.

PMID:
12766946
DOI:
10.1002/bies.10282
[Indexed for MEDLINE]

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