Free access
Volume 21, Number 5, 1990
Anna Maurizio
Page(s) 457 - 468
Apidologie 21 (1990) 457-468
DOI: 10.1051/apido:19900507

Patterns of larval food production by hypopharyngeal glands in adult worker honey bees

D. Knecht and H.H. Kaatz

Lehrstuhl Entwicklungsphysiologie, Zoologisches Institut der Universität Tübingen, Auf der Morgenstelle 28, D-7400 Tübingen, FRG

Abstract - Ultrastructural changes of the hypopharyngeal gland cells were analyzed during imaginal development of worker honey bees (Apis mellifera L). The rough endoplasmic reticulum increases immediately after emergence, reaches a maximum during the nursing phase and decreases in field bees. Accordingly, high rates of protein synthesis were measured in nurse bees and low protein production in foragers. Secretion reservoirs are formed within the intracellular ductules. They are surrounded by a sheath of numerous microvilli. Larval food proteins are secreted into the reservoirs and stored as demonstrated immunocytochemically. Even in foraging bees, small amounts of larval food proteins are stored, indicating the flexibility of the worker to potentially react to changing colonial and environmental conditions.

Key words: Apis mellifera / hypopharyngeal gland / protein synthesis / ultrastructure / immunocytochemistry / ontogenesis

What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access.

An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.

  • If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
  • You can define your own OpenURL resolver with your EDPS Account.
    In this case your choice will be given priority over that of your library.
  • You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see You should disable this module if you wish to use the OpenURL server that you or your library have defined.