Brain glycogen during non-diapausing and diapausing development of Pieris brassicae larvae and pupae

Summary

Histological and cytological localization of glycogen was studied in the brain of Pieris brassicae larvae and pupae by histochemistry and electron microscopy. The major glycogen deposits were observed in glial cells located between the cortex and the neuropile and also in perineurial cells. The concentrations of brain glycogen were measured in the larvae and the pupae during non-diapausing and diapausing development. In addition, we demonstrated that starvation reduces the density of the brain glycogen deposits as well as the concentrations of glycogen.

Key words:

• Brain
• diapause
• glycogen
• electron microscopy
• histochemistry
• Pieris brassicae