Document Detail


Hypertrehalosaemic peptides in the honeybee (Apis mellifera): purification, identification and function.
MedLine Citation:
PMID:  12770350     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The corpora cardiaca (CC) of the Italian race (including also the africanised variety) of the honeybee (Apis mellifera ligustica) contain approximately 3 pmol of a hypertrehalosaemic peptide. This peptide is identical in structure to the adipokinetic hormone (AKH) found in Manduca sexta, Mas-AKH. The CC of the dark European race of the honeybee (Apis mellifera carnica) contain no detectable Mas-AKH or any other adipokinetic/hypertrehalosaemic peptide. This is the first report of the occurrence of this peptide in a non-lepidopteran insect and of an intraspecific variation with regards to the presence or absence of a hypertrehalosaemic peptide in the CC of an insect. Extracts of A. m. ligustica CC elicit a strong adipokinetic/hypertrehalosaemic response when injected into crickets and cockroaches but extracts of A. m. carnica CC elicit no such responses when injected into crickets, cockroaches and butterflies. A weak hypertrehalosaemic response to injected Mas-AKH was observed in winter bees of both races, but there was no response in spring/summer bees. However, if a seasonal difference exists, it is at best minimal. Honeybees always have access to a more than adequate supply of high energy food in the form of nectar or honey stored in the hive. Thus, though A. m. ligustica CC contain a hypertrehalosaemic peptide, there is neither a glycogen-mobilising function of this hormone nor an adequate glycogen store in their fat body for its effective utilisation.
Authors:
M W. Lorenz; R Kellner; J Woodring; K H. Hoffmann; G Gäde
Publication Detail:
Type:  JOURNAL ARTICLE    
Journal Detail:
Title:  Journal of insect physiology     Volume:  45     ISSN:  1879-1611     ISO Abbreviation:  J. Insect Physiol.     Publication Date:  1999 Jul 
Date Detail:
Created Date:  2003-May-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  2985080R     Medline TA:  J Insect Physiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  647-653     Citation Subset:  -    
Affiliation:
Department of Animal Ecology I, University of Bayreuth, 95440, Bayreuth, Germany
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