Division of the Generative Cell in Impatiens Balsamina L

Abstract

The division of the generative cell of Impatiens Balsamina was studied in pollen-tube cultures.
The generative cell enters the tube in prophase and remains in this stage for about 30 minutes after germination. Metaphase lasts about 5-10 minutes; 40 minutes after germination anaphasic separa-tion begins.
Spindle-fibres, phragmoplasts or cell-plates were not seen during division; cytokinesis is accomplished by means of constriction.
Some abnormalities are described.
The haploid chromosome number is seven.