E e

Fig. 10.4 Fluorescence micrograph of a single cell of Chinese waterchestnut. The cell was released from parenchyma tissue after extraction in mild alkali. Abbreviations: f: cell faces; e: edges of cell faces. The cell is approximately 100 |J,m across.

the phenolic moieties remaining in the cell wall indicated that they were enriched in 8,8'-DiFA in the aryltetralyn form (Waldron et al., 1997a) suggesting that there may be some specificity in the role of this dehydrodimer as later highlighted by Parker et al. (2003).

The role of the bulk of the middle lamella in cell adhesion has also been studied. Parker et al. (2000) have investigated the structures remaining on the surface of separated potato cells and have observed that the middle lamella is a separate entity which is attached to the cell walls only at the edges of the cell faces. This result strongly supports the dominant role of the edge of the cell face in adhesion, and indicates that the bulk of the middle lamella is probably not involved in adhesion. The importance of the edges of the face is also supported by mathematical considerations by Jarvis (1998).

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