Regeneration of Sclerenchyma in Wounded Dicotyledon Stems

When the sclerenchyma cylinder that surrounds the vascular cylinderin many dicotyledon stems is interrupted by cutting away oneside of an internode, its continuity becomes restored in somespecies by the differentiation of sclereids within the woundcallus. These sclereids, which may be scattered or arrangedin clumps or in a continuous sheet, lie in a zone within the‘cortical’ parenchyma between the regenerated vascularcylinder and the wound cork. The amount and especially the arrangementof regenerated sclerenchyma tends to reflect that of the originalprimary sclerenchyma cylinder in the unwounded stem, exceptthat longitudinal continuity is poorly developed and all fibresare replaced by sclereids. Syringa vulgaris L, lilac, regeneration, differentiation, fibres, sclereids, sclerenchyma, positional control