Heritability of symbiont density reveals distinct regulatory mechanisms in a tripartite symbiosis

Publication Overview
TitleHeritability of symbiont density reveals distinct regulatory mechanisms in a tripartite symbiosis
AuthorsParkinson JF, Gobin B, Hughes WO
TypeJournal Article
Journal NameEcology and evolution
Volume6
Issue7
Year2016
Page(s)2053-60
CitationParkinson JF, Gobin B, Hughes WO. Heritability of symbiont density reveals distinct regulatory mechanisms in a tripartite symbiosis. Ecology and evolution. 2016 Apr; 6(7):2053-60.

Abstract

Beneficial eukaryotic-bacterial partnerships are integral to animal and plant evolution. Understanding the density regulation mechanisms behind bacterial symbiosis is essential to elucidating the functional balance between hosts and symbionts. Citrus mealybugs, Planococcus citri (Risso), present an excellent model system for investigating the mechanisms of symbiont density regulation. They contain two obligate nutritional symbionts, Moranella endobia, which resides inside Tremblaya princeps, which has been maternally transmitted for 100-200 million years. We investigate whether host genotype may influence symbiont density by crossing mealybugs from two inbred laboratory-reared populations that differ substantially in their symbiont density to create hybrids. The density of the M. endobia symbiont in the hybrid hosts matched that of the maternal parent population, in keeping with density being determined either by the symbiont or the maternal genotype. However, the density of the T. princeps symbiont was influenced by the paternal host genotype. The greater dependency of T. princeps on its host may be due to its highly reduced genome. The decoupling of T. princeps and M. endobia densities, in spite of their intimate association, suggests that distinct regulatory mechanisms can be at work in symbiotic partnerships, even when they are obligate and mutualistic.

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Additional details for this publication include:
Property NameValue
ISSN2045-7758
eISSN2045-7758
Publication Date2016 Apr
Journal AbbreviationEcol Evol
DOI10.1002/ece3.2005
Elocation10.1002/ece3.2005
Publication ModelElectronic-eCollection
LanguageEnglish
Language Abbreng
Publication TypeJournal Article
Journal CountryEngland
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PMID: PubMedPMID:27099709