Abstract
The cellular basis of plant development and the need for cell-to-cell interactions to direct the differentiation of cells is well established. However, our understanding of the molecular mechanisms of cell-to-cell interactions within a developing plant organ is limited. The occurrence of the structurally complex class of arabinogalactan-protein (AGP) proteoglycans at the surface of all plant cells has led to much speculation on their function(s) during development and their possible involvement in interactions between cells (Clarke et al 1979, Fincher et al 1983, Basile and Basile 1993, Knox 1995, Kreuger and van Holst 1996, Du et al 1996, Nothnagel 1997, Schultz et al 1998, Pennell 1998). Structural aspects of the complex carbohydrates of AGPs, the variability and diversity of the protein core and details of their location and attachment at plasma membranes and cell walls are discussed elsewhere (Clarke et al 1979, Fincher et al 1983, Du et al 1996, Nothnagel 1997, Schultz et al 1998). The biochemical complexity of AGPs, their heterogeneity and their range of physical properties have led to suggestions that they may function as lubricants, adhesion molecules or nutrients. It has also been proposed that they in some way encode information at cell surfaces that is utilized during development. Given such apparent complexity, several diverse experimental approaches to AGP function are applicable and useful. These varied approaches have begun to focus attention on AGPs in relation to particular cellular processes. The AGPs are now implicated in the three fundamental cellular processes that are coordinated to produce the plant body: cell proliferation, cell expansion and cell differentiation.
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Steele-King, C.G., Willats, W.G.T., Paul Knox, J. (2000). Arabinogalactan-Proteins and Cell Development in Roots and Somatic Embryos. In: Nothnagel, E.A., Bacic, A., Clarke, A.E. (eds) Cell and Developmental Biology of Arabinogalactan-Proteins. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-4207-0_9
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DOI: https://doi.org/10.1007/978-1-4615-4207-0_9
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