144 Contribution to Knowledge of Silver-Leaf Disease 



most remarkable features of disorganisation. Some nuclei send off 

 two such fine projections. These thread-like projections are sent off 

 either from the rounded nucleus or in most cases terminate one or 

 more of the above-described lobes (Figs. 6, 7, 8). 



In many other cases the elongated nucleus lies transversely across 

 a palisade cell, giving the appearance of a transverse septum (Figs. 9, 10). 



M 



Fig. 7. Palisade cell showing nucleus with filamentous projections. 

 Figs. 9, 10. Palisade cells showing transverse orientation of nuclei. 



And at the same time both ends of the nucleus spread somewhat laterally 

 along the walls so that the nucleus, changed in this way, has two concave 

 surfaces (Fig. 11). Sometimes this septum-like nucleus is of a consider- 

 able size so that it fills a third of a cell. The outlines of the septum-like 

 nuclei become in some cases irregular (Fig. 12). While the septum-like 

 nuclei appear in the palisade cells rather frequently, yet this is not 

 the case in the spongy parenchyma. On the contrary, in the latter 

 tissue the nuclei commonly show sharp pointed lobes as was above 



