Characterisation of Wolbachia-like bacteria isolated from the parthenogenetic stored-product pest psocid Liposcelis bostrychophila (Badonnel) (Psocoptera)

Yusuf, Mohammed Abdi Sheikh; Turner, Bryan

doi:10.1016/s0022-474x(02)00098-x

Cited by 53 publications

(56 citation statements)

References 30 publications

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“…Other than the pea aphid Rickettsia sp., the first record of a Rickettsia sp. in a phytophagous insect, that bacterium has been reported from the orders Psocoptera, Coleoptera, and Hymenoptera, which are not known to have interaction with vertebrates (20,22,41,43). Outside the Insecta, a Rickettsia sp.…”

Section: Discussionmentioning

confidence: 99%

Identification and Localization of a Rickettsia sp. in Bemisia tabaci (Homoptera: Aleyrodidae)

Gottlieb

Ghanim

Chiel

et al. 2006

Appl Environ Microbiol

269

179

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Whiteflies (Homoptera: Aleyrodidae) are sap-sucking insects that harbor "Candidatus Portiera aleyrodidarum," an obligatory symbiotic bacterium which is housed in a special organ called the bacteriome. These insects are also home for a diverse facultative microbial community which may include Hamiltonella, Arsenophonus, Fritchea, Wolbachia, and Cardinium spp. In this study, the bacteria associated with a B biotype of the sweet potato whitefly Bemisia tabaci were characterized using molecular fingerprinting techniques, and a Rickettsia sp. was detected for the first time in this insect family. Rickettsia sp. distribution, transmission and localization were studied using PCR and fluorescence in situ hybridizations (FISH). Rickettsia was found in all 20 Israeli B. tabaci populations screened but not in all individuals within each population. A FISH analysis of B. tabaci eggs, nymphs, and adults revealed a unique concentration of Rickettsia around the gut and follicle cells, as well as a random distribution in the hemolymph. We postulate that the Rickettsia enters the oocyte together with the bacteriocytes, leaves these symbionthousing cells when the egg is laid, multiplies and spreads throughout the egg during embryogenesis and, subsequently, disperses throughout the body of the hatching nymph, excluding the bacteriomes. Although the role Rickettsia plays in the biology of the whitefly is currently unknown, the vertical transmission on the one hand and the partial within-population infection on the other suggest a phenotype that is advantageous under certain conditions but may be deleterious enough to prevent fixation under others.

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Section: Discussionmentioning

confidence: 99%

Identification and Localization of a Rickettsia sp. in Bemisia tabaci (Homoptera: Aleyrodidae)

Gottlieb

Ghanim

Chiel

et al. 2006

Appl Environ Microbiol

269

179

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“…It has been found that some Rickettsia strains have positive effects on host fitness (92), and in particular, these symbionts have been shown to play an essential role in oogenesis in the booklouse L. bostrycophila (54) and possibly also in the bark beetle Coccotrypes dactyliperda (93). In some cases, infections by reproductive parasites can have beneficial effects on their arthropod hosts.…”

Section: Downloaded Frommentioning

confidence: 99%

“…However, in most cases, the effect of Rickettsia on the invertebrate host has not been established yet. In general, Rickettsia bacteria are facultative symbionts, but in the booklouse Liposcelis bostrychophila the association is strictly obligate and Rickettsia has an essential role in oocyte development (54,92). Facultative symbiotic Rickettsia strains have been reported to negatively affect some aspects of host fitness, causing reductions in body weight, fecundity, and longevity in the pea aphid (16,60,64), reductions in viability in some blood-feeding arthropod vectors (5,46), and increased susceptibility to insecticides in the sweet potato whitefly (41).…”

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confidence: 99%

Rickettsia Symbionts Cause Parthenogenetic Reproduction in the Parasitoid Wasp Pnigalio soemius (Hymenoptera: Eulophidae)

Giorgini¹,

Bernardo²,

Monti³

et al. 2010

Appl Environ Microbiol

126

121

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Bacteria in the genus Rickettsia are intracellular symbionts of disparate groups of organisms. Some Rickettsia strains infect vertebrate animals and plants, where they cause diseases, but most strains are vertically inherited symbionts of invertebrates. In insects Rickettsia symbionts are known to have diverse effects on hosts ranging from influencing host fitness to manipulating reproduction. Here we provide evidence that a Rickettsia symbiont causes thelytokous parthenogenesis (in which mothers produce only daughters from unfertilized eggs) in a parasitoid wasp, Pnigalio soemius (Hymenoptera: Eulophidae). Feeding antibiotics to thelytokous female wasps resulted in production of progeny that were almost all males. Cloning and sequencing of a fragment of the 16S rRNA gene amplified with universal primers, diagnostic PCR screening of symbiont lineages associated with manipulation of reproduction, and fluorescence in situ hybridization (FISH) revealed that Rickettsia is always associated with thelytokous P. soemius and that no other bacteria that manipulate reproduction are present. Molecular analyses and FISH showed that Rickettsia is distributed in the reproductive tissues and is transovarially transmitted from mothers to offspring. Comparison of antibiotic-treated females and untreated females showed that infection had no cost. Phylogenetic analyses of 16S rRNA and gltA gene sequences placed the symbiont of P. soemius in the bellii group and indicated that there have been two separate origins of the parthenogenesis-inducing phenotype in the genus Rickettsia. A possible route for evolution of induction of parthenogenesis in the two distantly related Rickettsia lineages is discussed.The genus Rickettsia contains a group of obligate intracellular symbionts of eukaryotic cells and belongs to the family Rickettsiaceae in the order Rickettsiales of the Alphaproteobacteria (58, 90). Many species have medical importance as they are pathogens of humans and other vertebrates; pathogenic Rickettsia species infect their hosts through blood-feeding arthropods, including lice, fleas, ticks, and mites (51, 80). In addition to Rickettsia species that cause infectious diseases in vertebrates, symbiotic species have been found in disparate groups of organisms, including arthropods, annelids, amoebae, hydrozoa, and plants (53). Rickettsia appears to be especially common in arthropods, having been found in a wide range of taxa in the classes Entognatha

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“…In later studies he listed 33 parthenogenetic species from the West Palaearctic, including both obligatory and facultative species. The successful survival of psocids is partly owing to their parthenogenetic mode of reproduction, which is due to the presence of rickettsial bacteria in the ovaries and developing oocytes (Yusuf and Turner, 2004).…”

Section: Parthenogenesis In Psocidsmentioning

confidence: 99%

Psocid: A new risk for global food security and safety

Ahmedani

Naz

Aslam

et al. 2010

Appl. Entomol. Zool.

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Post-harvest losses caused by stored product pests are posing serious threats to global food security and safety. Among the storage pests, psocids were ignored in the past due to unavailability of the significant evidence regarding quantitative and qualitative losses caused by them. Their economic importance has been recognized by many researchers around the globe since the last few years. The published reports suggest that the pest be recognized as a new risk for global food security and safety. Psocids have been found infesting stored grains in the USA, Australia, UK, Brazil, Indonesia, China, India and Pakistan. About sixteen species of psocids have been identified and listed as pests of stored grains. Psocids generally prefer infested kernels having some fungal growth, but are capable of excavating the soft endosperm of damaged or cracked uninfected grains. Economic losses due to their feeding are directly proportional to the intensity of infestation and their population. The pest has also been reported to cause health problems in humans. Keeping the economic importance of psocids in view, their phylogeny, distribution, bio-ecology, management and pest status have been reviewed in this paper.

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Characterisation of Wolbachia-like bacteria isolated from the parthenogenetic stored-product pest psocid Liposcelis bostrychophila (Badonnel) (Psocoptera)

Cited by 53 publications

References 30 publications

Identification and Localization of a Rickettsia sp. in Bemisia tabaci (Homoptera: Aleyrodidae)

Identification and Localization of a Rickettsia sp. in Bemisia tabaci (Homoptera: Aleyrodidae)

Rickettsia Symbionts Cause Parthenogenetic Reproduction in the Parasitoid Wasp Pnigalio soemius (Hymenoptera: Eulophidae)

Psocid: A new risk for global food security and safety

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