Effect of juvenile hormone III on the ultrastructure of the corpora allata in Melipona quadrifasciata (Hymenoptera,. Apidae, Meliponýný)
Braz. j. morphol. sci
;
23(3/4): 393-400, July-Dec. 2006. ilus
Article
in English
| LILACS
| ID: lil-644236
ABSTRACT
Changes in hormonal levels can produce alternative phenotypes. Juvenile hormone III plays an importantrole in the regulation of metamorphosis, caste determination and age in bees. In this work, we examined theultrastructure of corpora allata cells from stingless bees (Melipona quadrifasciata) treated with juvenilehormone during development. The corpora allata cells of M. quadrifasciata queens showed greater activitythan those of workers. The topical application of juvenile hormone III altered the cellular ultrastructureand either delayed development (as shown by fewer mitochondria and greater chromatin condensation) orenhanced development (looser chromatin and numerous mitochondria) when compared to untreated (control)bees. Our results show that corpora allata cells differ in their ultrastructural characteristics and that thecessation of juvenile hormone production by these cells in M. quadrifasciata is not synchronous.
Full text:
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Index:
LILACS (Americas)
Main subject:
Bees
/
Corpora Allata
/
Insect Hormones
Limits:
Animals
Language:
English
Journal:
Braz. j. morphol. sci
Journal subject:
Anatomy
Year:
2006
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Federal University of Uberlândia/BR
/
São Paulo State University/BR
/
University of São Paulo/BR
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