Abstract
The object of this paper is to describe more precisely the ultrastructural localization of glucose-6-phosphatase activity in the cells of digestive glands of Drosera capensis during the mucigenic phase. The detection reaction is specific and very sensitive to fixing by glutaraldehyde.
At no time was any activity detected in the endoplasmic reticulum or the dictyosomes. As in all plant specimens studied previously, the plasmalemma was very active. However, the majority of the glucose-6-phosphatase activity was concentrated in the cell wall, in the zones where mucilage accumulate (parietal “protuberances”, peripheral and median zones of the cell wall). It has not been possible to determine the significance of this localization.
