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Cell walls as a source of signals regulating the fate and development of plant cells

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Rodakowska E. , Kasprowicz A. , Lapa A. , Luczak A. , Derba M. , Wojtaszek P.

2006

nr 4

18-35

Cell walls are the outermost functional zone of plant cells. Although they surround individual cells, at the same time they form a part of supracellular structure ? the apoplast. On the other hand, they are also an indispensable component of the structural and functional continuum formed between cell wall, plasma membrane, and cytoskeleton (WMC continuum), and spanning the whole cell. Thus, cell walls are crucial for the communication of cells with their surrounding. This paper constitutes a short review of the importance of plant cell walls as a source of signalling molecules. Particular attention is paid to: 1) cell walls as a kind of mechanical system characteristic to plants; 2) generation and transport of extracellular signalling molecules, such as signalling peptides and oligosaccharins; 3) apoplastic source of reactive oxygen species and nitric oxide. The review is supplemented with the description of selected results coming from our research group.