2016
DOI: 10.1128/aem.04131-15
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Host Plant Determines the Population Size of an Obligate Symbiont (Buchnera aphidicola) in Aphids

Abstract: bBuchnera aphidicola is an obligate endosymbiont that provides aphids with several essential nutrients. Though much is known about aphid-Buchnera interactions, the effect of the host plant on Buchnera population size remains unclear. Here we used quantitative PCR (qPCR) techniques to explore the effects of the host plant on Buchnera densities in the cotton-melon aphid, Aphis gossypii. Buchnera titers were significantly higher in populations that had been reared on cucumber for over 10 years than in populations… Show more

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Cited by 51 publications
(69 citation statements)
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“…Besides the intraspecific variation in melezitose production, the present study also reveals an aphid genotype‐dependent variation in amino acid concentration. More genotypes should be studied aiming to determine whether the detected decrease of amino acid concentration found in the honeydew of the low melezitose genotype is linked to the lack of melezitose production or to aphid genotype‐dependent population sizes of the primary endosymbiont Buchnera (Zhang et al ., ). Alternatively, the significant difference in amino acid concentration in the honeydew could indicate a difference in resilience to the presence of secondary endosymbionts (Scarborough et al ., ; Russell & Moran, ; Łukasik et al ., ).…”
Section: Discussionmentioning
confidence: 97%
“…Besides the intraspecific variation in melezitose production, the present study also reveals an aphid genotype‐dependent variation in amino acid concentration. More genotypes should be studied aiming to determine whether the detected decrease of amino acid concentration found in the honeydew of the low melezitose genotype is linked to the lack of melezitose production or to aphid genotype‐dependent population sizes of the primary endosymbiont Buchnera (Zhang et al ., ). Alternatively, the significant difference in amino acid concentration in the honeydew could indicate a difference in resilience to the presence of secondary endosymbionts (Scarborough et al ., ; Russell & Moran, ; Łukasik et al ., ).…”
Section: Discussionmentioning
confidence: 97%
“…Aphis gossypii , currently named the cotton-melon aphid, is a pest for several crops, including melon, marrow, zucchini, potato, eggplant, cotton, ornamental hibiscus, and citrus fruit trees. Like all aphids, A. gossypii carries the bacterium Buchnera aphidicola as an obligate endosymbiont providing several essential nutrients ( Douglas, 2003 ) and the phenotypic plasticity in host plant use by A. gossypii may be related to the size of the B. aphidicola population ( Zhang et al, 2016 ). Many other facultative endosymbionts have been detected in aphid species and shown to play a role in species ecology ( Oliver et al, 2010 ); however, facultative endosymbionts appear to be rare in A. gossypii ( Carletto et al, 2008 ).…”
Section: Cucumis Melo Aphis Gossypii and The Viruses It Tramentioning
confidence: 99%
“…Symbiont densities have been shown to vary with host plant species, plant secondary metabolites, rearing generation (for Buchnera; Zhang et al, 2016), host genotype, and temperature (for Wolbachia; Mouton et al, 2007), implying that there is local adaptation or selective pressures on symbiont-host interactions. Although these symbiont density fluctuations have been well studied in laboratorymaintained symbiont-host systems, little attention has been paid to changes in their seasonal density dynamics in natural aphid populations.…”
Section: Introductionmentioning
confidence: 99%