VOLUME XXX NUMBER 2 
BOTANICAL GAZETTE 
AUGUST, 1900 
THE DEVELOPMENT AND FUNCTION OF THE CELL 
PLATE IN HIGHER PLANTS. 
H. G. TIMBERLAKE. 
(WITH PLATES VIII AND IX) 
Historical. 
AstpE from the work of Strasburger there have been very 
few investigations reported that have treated fully the subject of 
the cell plate and its history in the vegetable cell. So far as I 
know, the term cell plate was first used in its present sense by 
Strasburger in the first edition of Zedlbildung und Zelltheilung. Xt 
was here that he made the statement that the beginning of the 
cell plate is to be found in swellings of the connecting spindle 
fibers. The subject was more fully discussed in the third edition 
of the above work, and I shall refer to that in greater detail 
below. 
In 1878 Treub published his classic researches on the réle of 
the nucleus in cell division,* in which he describes the process of 
cell plate and cell wall formation in the living cells of the pro- 
embryo of Orchis latifolia and the ovules of Epipactis palusins. 
By keeping the tissues in a 1.25 per cent. solution of KNO, he — 
was able to make an extended study of the above processes. 
The first indication of the formation of a cell plate is a collection 
of 8ranules across the equatorial region of the spindle, which 
move into place from various directions in the cytoplasm. They 
* Quelques 7 aan sur le réle du noyau dans la division des cellules végétales. 
Amsterdam, 187 
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