J Integr Plant Biol. ›› 1964, Vol. 12 ›› Issue (1): -.

• Research Articles •    

On the Phenomenon of Nuclear Intercellular Extrusion in Plant Epidermal Tissue

Wu Siao-hang   

Abstract: 1. A brief historical review on the reports of the occurrence of intercellular extrusion of nuclear material of the vegetative organ, is given, especially with regard to the epidermal tissue of higher plants. Interpretations of this phenomenon both normal and abnormal by various authors are presented. 2. Some interesting phases of this phenomenon have been investigated by using Allium fistulosum as material. Based on observations and experiments of the present investigation, it is suggested that the intercellular extrusion of nuclear material of the epidermal cells may be an artificial phenomenon. For these cells in a piece of epidermal tissue have been injured during the process of stripping. 3. Analysis of the dynamics of the processes of the breakdown of epidermal cell-wall and the nuclear intercellular extrusion shows that the nuclear material mechanism of the intercellular extrusion of epidermal tissue undergoing the stripping treatment would be as follows: On the one hand, the working pressure or the source of bending force of stripping treatment is the mechanical force which causes a strong bending stress in the epidermal cell and cracks its cell-wall. On the other hand, by forming an non-equilibrium of the two intracellular pressures between the cell just broken and its neighbouring cracked cell or cells, the former cell presses its nucleus close against the split-opening of the cellwall at first; later, by the same way, the content of the nucleus would be more or less extruded via the split-opening into the neighbouring cell or cells. The process of nuclear intercellular extrusion of the epidermal tissue under stripping treatment is thus completed.

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