Brain neurosecretory system and retrocerebral endocrine glands of acrida bicolor (thunb) (Orthoptera acrididae)

Abstract

The neurosecretory system and retrocerebral endocrine glands of A. bicolor y^eıe reveaîed by histological sections and whole mount, using Chrome Hematoxylin Phloxine and Performic Acid Victoria Blue technigues.In account for the neurosecretory granules and their staining properties, one type neutosecretory celi was identified in sections. There was no difference between the histology of neurosec retory celIs and syncytial corpora cardiaca of feınale and male individuals. It was observed that the females were bigger than the males and they had also bigger corpora allata.The median neurosecretory celIs and their emerging axons in the brain were not seen by total staining. However, in the same total stained preparates the outer parts of nerve corporis cardiaci-I and the storage lobe of the corpus cardiacum were stained in various density at different times of a day. So, it was conciuded tliat the neurosecretory materials were transported by the nervi corporis cardiaci-I and that the neurohaemal organ was corpora cardiaca in this species.