Effects of Wolbachia in the uzifly, Exorista sorbillans, a parasitoid of the silkworm, Bombyx mori

Puttaraju, H. P.; Prakash, B. M.

doi:10.1093/jis/5.1.30

Cited by 12 publications

(23 citation statements)

References 22 publications

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“…2010; Zhong and Li 2013). Although we find the effect driven by sires, previous work shows support for a dam effect (Puttaraju and Prakash 2005; Zhong and Li 2013), which was interpreted as resulting from Wolbachia-mediated cytoplasmic incompatibility.…”

Section: Resultscontrasting

confidence: 84%

“…This bias toward increased relative production of males following tetracycline treatment is consistent with previous results, which consistently show an excess of males produced following tetracycline-induced symbiont depletion (Costa et al. 1997; Puttaraju and Prakash 2005; Miller et al. 2010; Zhong and Li 2013).…”

Section: Resultsmentioning

confidence: 99%

“…Consistent with the coevolutionary potential latent in symbiotic relationships, studies in whiteflies, silkworm, and Drosophila have indicated that depletion of Wolbachia can alter host reproductive phenotypes including fitness, sex ratio, and mate discrimination (Costa et al. 1997; Puttaraju and Prakash 2005; Miller et al. 2010; Zhong and Li 2013), which would be consistent with a breakdown of coevolutionary dynamics between Wolbachia and its host.…”

Section: Introductionmentioning

confidence: 99%

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Tetracycline‐exposed Drosophila melanogaster males produce fewer offspring but a relative excess of sons

O’Shea

Singh

2015

Ecology and Evolution

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A large diversity of species possesses endosymbionts; these endosymbionts can exhibit mutualistic, parasitic, and commensal relationships with their hosts. Previous work has consistently revealed that depleting endosymbiont titer with antibiotic treatment can significantly alter host fitness and function, particularly with respect to reproductive phenotypes. Although these findings are often interpreted as resulting from the breakdown of highly coevolved symbioses, it is possible that antibiotic treatment itself rather than endosymbiont removal contributes to the observed perturbations in reproductive phenotypes. Here, we investigate the effect of tetracycline treatment on sex ratio and male reproductive fitness using Drosophila melanogaster as a model system. Our results indicate that tetracycline-treated males produce a relative excess of sons. We also find that tetracycline treatment reduces the number of progeny produced by treated males but not treated females. These findings are independent of the effects of tetracycline on Wolbachia titer and implicate the antibiotic itself as mediating these changes. It is yet unclear whether the sex ratio shift and reduction in male reproductive fitness are direct or indirect consequences of tetracycline exposure, and more work is needed to determine the molecular mechanisms by which these disturbances in reproductive phenotypes arise. Our data highlight the importance of considering the potentially confounding effects of antibiotic treatment when investigating the effects of endosymbiont depletion on host phenotypes.

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Section: Resultscontrasting

confidence: 84%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tetracycline‐exposed Drosophila melanogaster males produce fewer offspring but a relative excess of sons

O’Shea

Singh

2015

Ecology and Evolution

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“…On the other hand, results clearly revealed the existence of a strong direct benefit of Wolbachia infection for females as previously described (Puttaraju and Prakash 2005). The infected females' fecundity (number of eggs laid) and the viability of their eggs (the hatching rate) are significantly higher than that of cured females.…”

Section: Effect Of Wolbachia Infection On Reproductive Fitness Traitssupporting

confidence: 78%

Effect of Wolbachia infection and temperature variations on the fecundity of the Uzifly Exorista sorbillans (Diptera: Tachinidae)

2011

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Wolbachia are cytoplasmically inherited endosymbionts known to cause several reproductive alterations in insects which allow their spread in host populations. In the Uzifly Exorista sorbillans, endoparasites of silkworms, the prevalence of Wolbachia is high in the field. In the present study, we investigated Wolbachia's effects on the Uzifly fitness traits by measuring fecundity and hatching rate in crosses involving infected and cured individuals. We found evidence for positive fitness effects associated with Wolbachia infection in females which could help promote the spread of Wolbachia in E. sorbillans populations. We tested two types of treatments for removing Wolbachia, antibiotic therapy and high temperature treatment and found an influence on the reproduction: females treated by antibiotics have a lower fecundity than females cured by high temperature which could indicate a negative effect of the antibiotherapy on females' fitness. Furthermore, the monitoring of the Uzifly populations during 2 years revealed seasonal variations of the offspring production which may be linked to temperature.

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“…[Werren, 1997 andWerren et al, 2008 for a review]. It has also been noted that the endosymbiont-host combination is sometimes essential for the successful development of the host's germ cells [Puttaraju and Prakash, 2009]. It seems clear that for Wolbachia , the germline of its host is more than a channel to its dispersion and also that Wolbachia 's manipulation of its host's reproduction involves cytogenetic changes affecting chromosomes and chromatin.…”

Section: Discussionmentioning

confidence: 99%

Wolbachia Induced Cytogenetical Effects as Evidenced in Chorthippus parallelus (Orthoptera)

Sarasa

Bernal²,

Fernández-Calvı́n³

et al. 2012

Cytogenet Genome Res

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The cytoplasmic incompatibility induced by the bacterial endosymbiont Wolbachia is attributed to chromatin modification in the sperm of infected individuals and is only ‘rescued’ by infected females after fertilization. Chorthippus parallelus is a grasshopper with 2 subspecies that form a hybrid zone in the Pyrenees in which this Wolbachia-generated cytoplasmic incompatibility has recently been described. The analysis of certain cytogenetic traits (sex chromosome-linked heterochromatic bands, nucleolar organizing region expression, spermatid size and morphology, and number of chiasmata formed) in pure and hybrid Chorthippus parallelus that are infected and not infected by this bacterium indicates that the infection affects some of these traits and, in the case of the spermatids, reveals a synergism between the infection and the hybrid condition. These results are interpreted as being secondary effects of the chromatin modification induced by Wolbachia which thereby support this model of modification/rescue. The possible effects of these cytogenetic variations on affected individuals are also considered.

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Effects of Wolbachia in the uzifly, Exorista sorbillans, a parasitoid of the silkworm, Bombyx mori

Cited by 12 publications

References 22 publications

Tetracycline‐exposed Drosophila melanogaster males produce fewer offspring but a relative excess of sons

Tetracycline‐exposed Drosophila melanogaster males produce fewer offspring but a relative excess of sons

Effect of Wolbachia infection and temperature variations on the fecundity of the Uzifly Exorista sorbillans (Diptera: Tachinidae)

<b><i>Wolbachia</i></b> Induced Cytogenetical Effects as Evidenced in <b><i>Chorthippus parallelus</i></b> (Orthoptera)

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