Document Detail

Sources of variation in dietary requirements in an obligate nutritional symbiosis.
MedLine Citation:
PMID:  20667882     Owner:  NLM     Status:  MEDLINE    
The nutritional symbiosis between aphids and their obligate symbiont, Buchnera aphidicola, is often characterized as a highly functional partnership in which the symbiont provides the host with essential nutrients. Despite this, some aphid lineages exhibit dietary requirements for nutrients typically synthesized by Buchnera, suggesting that some aspect of the symbiosis is disrupted. To examine this phenomenon in the pea aphid, Acyrthosiphon pisum, populations were assayed using defined artificial diet to determine dietary requirements for essential amino acids (EAAs). Six clones exhibiting dependence on EAAs in their diet were investigated further. In one aphid clone, a mutation in a Buchnera amino acid biosynthesis gene could account for the clone's requirement for dietary arginine. Analysis of aphid F1 hybrids allowed separation of effects of the host and symbiont genomes, and revealed that both affect the requirement for dietary EAAs in the clones tested. Amino acid requirements were minimally affected by secondary symbiont infection. Our results indicate that variation among pea aphids in dependence on dietary amino acids can result from Buchnera mutation as well as variation in the host genotype.
Kevin J Vogel; Nancy A Moran
Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2010-07-28
Journal Detail:
Title:  Proceedings. Biological sciences / The Royal Society     Volume:  278     ISSN:  1471-2954     ISO Abbreviation:  Proc. Biol. Sci.     Publication Date:  2011 Jan 
Date Detail:
Created Date:  2010-11-24     Completed Date:  2011-03-02     Revised Date:  2013-05-29    
Medline Journal Info:
Nlm Unique ID:  101245157     Medline TA:  Proc Biol Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  115-21     Citation Subset:  IM    
Department of Ecology and Evolutionary Biology, The University of Arizona, Tucson, AZ 85721, USA.
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MeSH Terms
Amino Acids, Essential / metabolism*
Animal Nutritional Physiological Phenomena / physiology*
Aphids / genetics,  microbiology*
Buchnera / genetics,  physiology*
Crosses, Genetic
INDEL Mutation / genetics
Least-Squares Analysis
Sequence Analysis, DNA
Reg. No./Substance:
0/Amino Acids, Essential

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