Bacteriocyte-Associated Endosymbionts of Insects

Baumann, Paul; Moran, Nancy A.; Baumann, Linda C.

doi:10.1007/0-387-30741-9_16

Cited by 69 publications

(56 citation statements)

References 178 publications

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“…The effect of secondary symbionts on their insect hosts are not well understood (Baumann et al 2000;Baumann 2005); however, in the Acyrthosiphon pisum (Hemiptera: Aphidae) system, they are known to exert a number of effects including resistance to parasitoids (Oliver et al 2003;Ferrari et al 2004;Vorburger et al 2010) and fungal entomopathogens (Ferrari et al 2004, Scarborough et al 2005, thermal tolerance (Chen et al 2000;Montllor et al 2002;Russell and Moran 2006), and host plant specialization (Tsuchida et al 2004).…”

Section: Hemiptera-bacteria Symbiosesmentioning

confidence: 99%

Anthropogenic effects on interaction outcomes: examples from insect-microbial symbioses in forest and savanna ecosystems

et al. 2011

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The influence of humans on ecosystem dynamics has been, and continues to be, profound. Anthropogenic effects are expected to amplify as human populations continue to increase. Concern over these effects has given rise to a large number of studies focusing on impacts of human activities on individual species or on biotic community structure and composition. Lacking are studies on interactions, particularly mutualisms. Because of the role of mutualisms in ecosystem stability, such studies are critically needed if we are to begin to better understand and predict the responses of ecosystems to anthropogenic change. Most organisms are involved in at least one mutualism, and many in several. Mutualisms facilitate the ability of partners to exploit particular habitats and resources, and play a large role in determining ecological boundaries. When change disrupts, enhances, or introduces new organisms into a mutualism, the outcome and stability of the original partnership(s) is altered as are effects of the symbiosis on the community and ecosystem as a whole. In this paper, using examples from six microbe-insect mutualisms in forest and savanna settings, we showcase how varied and complex the responses of mutualisms can be to an equally varied set of anthropogenic influences. We also show how alterations of mutualisms may ramify throughout affected systems. We stress that researchers must be cognizant that many observed changes in the behaviors, abundances, and distributions of organisms due to human activities are likely to be mediated by mutualists which may alter predictions and actual outcomes in significant ways.

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Section: Hemiptera-bacteria Symbiosesmentioning

confidence: 99%

Anthropogenic effects on interaction outcomes: examples from insect-microbial symbioses in forest and savanna ecosystems

et al. 2011

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“…Chief among these are the intimate symbioses that have evolved with bacteria and other micro-organisms. These interactions are widespread and range from casual associations to complete co-dependence (Ishikawa 2003;Dillon & Dillon 2004;Baumann et al 2006). Bacteria may contribute to host immunity, thermoregulation and communication (reviews in Bourtzis & Miller 2003).…”

Section: Introductionmentioning

confidence: 99%

Give us the tools and we will do the job: symbiotic bacteria affect olive fly fitness in a diet-dependent fashion

et al. 2010

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Olive flies (Bactrocera oleae) are intimately associated with bacteria throughout their life cycle, and both larvae and adults are morphologically adapted for housing bacteria in the digestive tract. We tested the hypothesis that these bacteria contribute to the adult fly's fitness in a diet-dependent fashion. We predicted that when dietary protein is superabundant, bacterial contribution will be minimal. Conversely, in the absence of protein, or when only non-essential amino acids are present (as in the fly's natural diet), we predicted that bacterial contribution to fitness will be significant. Accordingly, we manipulated diet and the presence of bacteria in female olive flies, and monitored fecundity-an indirect measure of fitness. Bacteria did not affect fecundity when females were fed a nutritionally poor diet of sucrose, or a proteinrich, nutritionally complete diet. However, when females were fed a diet containing non-essential amino acids as the sole source of amino nitrogen, egg production was significantly enhanced in the presence of bacteria. These results suggest that bacteria were able to compensate for the skewed amino acid composition of the diet and may be indispensable for wild adult olive flies that subsist mainly on nitrogen-poor resources such as honeydew.

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“…It has been estimated that at least 15-20% of insects live in such symbiotic relationships, allowing them to explore a great variety of ecological niches. Insects that live in close association with bacteria are characterized, in general, by feeding on unbalanced diets, poor in essential nutrients such as amino acids, sterols or vitamins, which are provided by the symbionts (Sasaki et al, 1991;Douglas, 1998;Baumann et al, 2000). Such is the case of members of the orders Homoptera (aphids, whiteflies, mealybugs, psylids and cicadas), Blattaria (cockroaches) and Coleoptera (weevils).…”

Section: Introductionmentioning

confidence: 99%

“…For the last few decades, many studies have been carried out regarding the biology of aphids, B. aphidicola, and the aphid-B. aphidicola association (revised in Douglas, 1998;Baumann et al, 2000;Latorre et al, 2003), as it is considered an excellent model to gain insights into the extreme evolutionary reductive process that takes place when bacterial lineages make the transition from an independent lifestyle to a permanent association with the host.…”

Section: Introductionmentioning

confidence: 99%

“…These changes can be characterised by the following features: amplification of the number of copies of the main chromosome per cell, an almost total absence of recombination, an increase in the rate of nucleotide substitution, high A þT content, an accumulation of deleterious mutations and loss of codon bias (Moran, 1996;Clark et al, 1999;Komaki and Ishikawa, 1999;Baumann et al, 2000;Moya et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

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Chromosomal stasis versus plasmid plasticity in aphid endosymbiont Buchnera aphidicola

et al. 2005

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Bacteriocyte-Associated Endosymbionts of Insects

Cited by 69 publications

References 178 publications

Anthropogenic effects on interaction outcomes: examples from insect-microbial symbioses in forest and savanna ecosystems

Anthropogenic effects on interaction outcomes: examples from insect-microbial symbioses in forest and savanna ecosystems

Give us the tools and we will do the job: symbiotic bacteria affect olive fly fitness in a diet-dependent fashion

Chromosomal stasis versus plasmid plasticity in aphid endosymbiont Buchnera aphidicola

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