Abstract:
:An ultrastructural study was carried out on the secretory activity of the ectal mandibular gland in the wasp Polistes dominulus (foundress and worker females as well as males). Secretory activity in foundresses proceeds slowly during hibernation and early spring, becoming prominent in late spring and then falling sharply during the summer. This sequential pattern of ultrastructural modifications follows a functional, annual cycle. However, by comparing the subcellular changes in the gland with colonial development, it appears that secretory activity fits in with the specie's social cycle rather than merely following the seasons. The highest levels of secretory activity correspond to the early, critical breeding phases, while activity slows down with an increase in colony protection, based on both primary (passive) and secondary (active) defenses, with the emergence of the workers. These correlations suggest that the ectal mandibular gland secretory product in P. dominulus is involved in chemical nest defense.
journal_name
J Morpholjournal_title
Journal of morphologyauthors
Fortunato A,Turillazzi S,Delfino Gdoi
10.1002/(SICI)1097-4687(200004)244:1<45::AID-JMOR5keywords:
subject
Has Abstractpub_date
2000-04-01 00:00:00pages
45-55issue
1eissn
0362-2525issn
1097-4687pii
10.1002/(SICI)1097-4687(200004)244:1<45::AID-JMOR5journal_volume
244pub_type
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