Document Detail


Experience-dependent development of the adult optic lobe and central brain in Drosophila melanogaster.
MedLine Citation:
PMID:  10389175     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The optic lobes, mushroom bodies (MB) and central complex (CC) of Drosophila melanogaster were investigated in order to find out whether rearing in different light regimes affect their size. Flies raised in constant light up for up to four days post eclosion had a lamina that was about 30% larger than in flies kept in constant darkness. A volume difference between light- and dark-reared flies could also be observed for the lobula plate, the MBs, and the CC. When the flies were kept in the dark for the first 12 hours of their adult life and then brought back to constant light for the next 3.5 days, the lamina was as small as the laminae of flies raised for four days in constant darkness. This finding suggests a critical period for lamina development during day one of the imago. Mutant studies suggest that the molecular mechanisms underlying this experience-dependent development might be quite diverse. For example, the structural plasticity of the mushroom bodies is abolished in the dunce mutation, whereas the light-dependent growth of the lamina is not. Finally, studies of optomotor behavior indicate an adaptational role for the structural plasticity in the optic lobe. Surprisingly, dark-reared flies see better under low light conditions than their light-reared counterparts. This suggests that a small lamina is not a bad lamina in the sense that dark-reared animals see worse. They rather adapt to the specific light-conditions they were growing up in.
Authors:
M Barth
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Review    
Journal Detail:
Title:  Rossiĭskii fiziologicheskiĭ zhurnal imeni I.M. Sechenova / Rossiĭskaia akademiia nauk     Volume:  85     ISSN:  0869-8139     ISO Abbreviation:  Ross Fiziol Zh Im I M Sechenova     Publication Date:  1999 Jan 
Date Detail:
Created Date:  1999-07-15     Completed Date:  1999-07-15     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  9715665     Medline TA:  Ross Fiziol Zh Im I M Sechenova     Country:  RUSSIA    
Other Details:
Languages:  eng     Pagination:  184-94     Citation Subset:  IM    
Affiliation:
Friedrich-Miescher-Labor der Max-Planck-Gesellschaft, Tübingen, Germany.
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MeSH Terms
Descriptor/Qualifier:
Aging / physiology*
Animals
Brain / physiology*
Drosophila melanogaster / genetics,  physiology*
Mutation
Optic Lobe, Nonmammalian / physiology*

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