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cytoplasmic incompatibility

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https://www.readbyqxmd.com/read/29320479/paternal-chromosome-loss-and-metabolic-crisis-contribute-to-hybrid-inviability-in-xenopus
#1
Romain Gibeaux, Rachael Acker, Maiko Kitaoka, Georgios Georgiou, Ila van Kruijsbergen, Breanna Ford, Edward M Marcotte, Daniel K Nomura, Taejoon Kwon, Gert Jan C Veenstra, Rebecca Heald
Hybridization of eggs and sperm from closely related species can give rise to genetic diversity, or can lead to embryo inviability owing to incompatibility. Although central to evolution, the cellular and molecular mechanisms underlying post-zygotic barriers that drive reproductive isolation and speciation remain largely unknown. Species of the African clawed frog Xenopus provide an ideal system to study hybridization and genome evolution. Xenopus laevis is an allotetraploid with 36 chromosomes that arose through interspecific hybridization of diploid progenitors, whereas Xenopus tropicalis is a diploid with 20 chromosomes that diverged from a common ancestor approximately 48 million years ago...
January 10, 2018: Nature
https://www.readbyqxmd.com/read/29286204/genetic-variation-and-potential-co-infection-of-wolbachia-among-widespread-asian-citrus-psyllid-diaphorina-citri-kuwayama-populations
#2
Chia-Ching Chu, Mark Hoffmann, W Evan Braswell, Kirsten S Pelz-Stelinski
Wolbachia can profoundly influence the survival, reproduction, and defenses of insect hosts. These interactions could potentially be harnessed for managing pests or insect-transmitted diseases. Diaphorina citri Kuwayama is a phloem-feeding pest capable of transmitting the putative causal agent of citrus greening, Candidatus Liberibacter asiaticus (CLas). Like many insects, D. citri is also infected with Wolbachia (wDi). Recent studies indicate that the relative abundance of wDi could be associated with the abundance of CLas, and that wDi may contribute to regulating expression of phage lytic cycle genes in CLas, suggesting the need for better understanding of wDi biology in general...
December 29, 2017: Insect Science
https://www.readbyqxmd.com/read/29274571/tantf2-a-contributor-for-wheat-resistance-to-the-stripe-rust-pathogen
#3
Qiong Zhang, Bing Wang, Jinping Wei, Xiaojie Wang, Qingmei Han, Zhensheng Kang
Nuclear Transport Factor 2 (NTF2) functions as a critical regulator in balancing the GTP-and GDP-bound forms of Ran, a class of evolutionarily conserved small GTP-binding protein. During the incompatible interaction between wheat-Puccinia striiformis f. sp. tritici (Pst), a cDNA fragment encoding a putative wheat NTF2 gene was found to be significantly induced, suggesting a potential role in wheat resistance to Pst. In this work, the full length of TaNTF2 was obtained, with three copies located on 7A, 7B and 7D chromosomes, respectively...
December 16, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29248525/assessing-the-efficiency-of-wolbachia-driven-aedes-mosquito-suppression-by-delay-differential-equations
#4
Mugen Huang, Jiaowan Luo, Linchao Hu, Bo Zheng, Jianshe Yu
To suppress wild population of Aedes mosquitoes, the primary transmission vector of life-threatening diseases such as dengue, malaria, and Zika, an innovative strategy is to release male mosquitoes carrying the bacterium Wolbachia into natural areas to drive female sterility by cytoplasmic incompatibility. We develop a model of delay differential equations, incorporating the strong density restriction in the larval stage, to assess the delicate impact of life table parameters on suppression efficiency. Through mathematical analysis, we find the sufficient and necessary condition for global stability of the complete suppression state...
December 14, 2017: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/29234159/evolution-of-reproductive-parasites-with-direct-fitness-benefits
#5
Roman Zug, Peter Hammerstein
Maternally inherited symbionts such as Wolbachia have long been seen mainly as reproductive parasites, with deleterious effects on host fitness. It is becoming clear, however, that, frequently, these symbionts also have beneficial effects on host fitness, either along with reproductive parasitism or not. Using the examples of cytoplasmic incompatibility (CI) and male-killing (MK), we here analyze the effect of direct fitness benefits on the evolution of reproductive parasites. By means of a simple theoretical framework, we synthesize and extend earlier modeling approaches for CI and MK, which usually ignore fitness benefits...
December 13, 2017: Heredity
https://www.readbyqxmd.com/read/29216317/novel-wolbachia-transinfected-aedes-aegypti-mosquitoes-possess-diverse-fitness-and-vector-competence-phenotypes
#6
Johanna E Fraser, Jyotika Taneja De Bruyne, Iñaki Iturbe-Ormaetxe, Justin Stepnell, Rhiannon L Burns, Heather A Flores, Scott L O'Neill
Wolbachia pipientis from Drosophila melanogaster (wMel) is an endosymbiotic bacterium that restricts transmission of human pathogenic flaviviruses and alphaviruses, including dengue, Zika, and chikungunya viruses, when introduced into the mosquito vector Aedes aegypti. To date, wMel-infected Ae. aegypti have been released in field trials in 5 countries to evaluate the effectiveness of this strategy for disease control. Despite the success in establishing wMel-infected mosquitoes in wild populations, and the well-characterized antiviral capabilities of wMel, transinfecting different or additional Wolbachia strains into Ae...
December 7, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/29214346/comparative-genomics-reveals-the-presence-of-putative-toxin-antitoxin-system-in-wolbachia-genomes
#7
Kopal Singhal, Sujata Mohanty
Multiple toxin-antitoxin (TA) systems are housed in different locations within the bacterial genome and are known to be associated with various cellular processes and stress-related adaptation. In endosymbionts, although, the TA system has scarce occurrence but studies have highlighted its presence in enhancing host-symbiont interactions. Wolbachia, an obligate endosymbiont, has recently been proposed as a biocontrol agent which may be helpful in controlling vector-borne diseases. There are reports suggesting the role of TA system in inducing cytoplasmic incompatibility in case of Wolbachia, however, the underlying mechanism is still not known...
December 6, 2017: Molecular Genetics and Genomics: MGG
https://www.readbyqxmd.com/read/29187976/genome-comparisons-indicate-recent-transfer-of-wri-like-wolbachia-between-sister-species-drosophila-suzukii-and-d-%C3%A2-subpulchrella
#8
William R Conner, Mark L Blaxter, Gianfranco Anfora, Lino Ometto, Omar Rota-Stabelli, Michael Turelli
Wolbachia endosymbionts may be acquired by horizontal transfer, by introgression through hybridization between closely related species, or by cladogenic retention during speciation. All three modes of acquisition have been demonstrated, but their relative frequency is largely unknown. Drosophila suzukii and its sister species D. subpulchrella harbor Wolbachia, denoted wSuz and wSpc, very closely related to wRi, identified in California populations of D. simulans. However, these variants differ in their induced phenotypes: wRi causes significant cytoplasmic incompatibility (CI) in D...
November 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/29187973/variation-in-reproductive-isolation-across-a-species-range
#9
Karen B Barnard-Kubow, Laura F Galloway
Reproductive isolation is often variable within species, a phenomenon that while largely ignored by speciation studies, can be leveraged to gain insight into the potential mechanisms driving the evolution of genetic incompatibilities. We used experimental greenhouse crosses to characterize patterns of reproductive isolation among three divergent genetic lineages of Campanulastrum americanum that occur in close geographic proximity in the Appalachian Mountains. Substantial, asymmetrical reproductive isolation for survival due to cytonuclear incompatibility was found among the lineages (up to 94% reduction)...
November 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/29181449/transcriptome-sequencing-reveals-novel-candidate-genes-for-cardinium-hertigii-caused-cytoplasmic-incompatibility-and-host-cell-interaction
#10
Evelyne Mann, Corinne M Stouthamer, Suzanne E Kelly, Monika Dzieciol, Martha S Hunter, Stephan Schmitz-Esser
Cytoplasmic incompatibility (CI) is an intriguing, widespread, symbiont-induced reproductive failure that decreases offspring production of arthropods through crossing incompatibility of infected males with uninfected females or with females infected with a distinct symbiont genotype. For years, the molecular mechanism of CI remained unknown. Recent genomic, proteomic, biochemical, and cell biological studies have contributed to understanding of CI in the alphaproteobacterium Wolbachia and implicate genes associated with the WO prophage...
November 2017: MSystems
https://www.readbyqxmd.com/read/29146940/development-and-physiological-effects-of-an-artificial-diet-for-wolbachia-infected-aedes-aegypti
#11
Heverton Leandro Carneiro Dutra, Silvia Lomeu Rodrigues, Simone Brutman Mansur, Sofia Pimenta de Oliveira, Eric Pearce Caragata, Luciano Andrade Moreira
The endosymbiotic bacterium Wolbachia spreads rapidly through populations of Aedes aegypti mosquitoes, and strongly inhibits infection with key human pathogens including the dengue and Zika viruses. Mosquito control programs aimed at limiting transmission of these viruses are ongoing in multiple countries, yet there is a dearth of mass rearing infrastructure specific to Wolbachia-infected mosquitoes. One example is the lack of a blood meal substitute, which accounts for the Wolbachia-specific physiological changes in infected mosquitoes, that allows the bacterium to spread, and block viral infections...
November 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29141766/molecular-detection-and-characterization-of-wolbachia-pipientis-from-culex-quinquefasciatus-collected-from-lahore-pakistan
#12
Muhammad Sajjad Sarwar, Nusrat Jahan, Fatima Shahbaz
The gram-negative, pleomorphic endosymbiont Wolbachia is known to infect a large number of insects and other arthropods naturally. This bacterium modifies the host biology, mainly causing reproductive alterations including feminization, death of male, parthenogenesis, and importantly cytoplasmic incompatibility. Wolbachia-induced cytoplasmic incompatibility results in nonviable offspring and vector population suppression. In addition, this bacterium rapidly spreads and propagates within the host population...
October 23, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29066721/multiscale-modelling-the-effects-of-ci-genetic-evolution-in-mosquito-population-on-the-control-of-dengue-fever
#13
Sha He, Xianghong Zhang, Juhua Liang, Sanyi Tang
Endosymbiotic Wolbachia bacteria are widely applied for the control of dengue fever by manipulating the reproductive mechanism of mosquitoes, including maternal inheritance and cytoplasmic incompatibility (CI). CI means that the offsprings from the matings between Wolbachia infected males and uninfected females can not be hatched. At present, CI effect is assumed as a constant in most of dynamic systems for the spread of Wolbachia. However, their spread may arouse the evolution of mosquitoes to resist CI. Thus, a multiscale model combining a birth-pulse model with a gene-induced discrete model for the frequencies of alleles is proposed to describe the spread of Wolbachia in mosquito population with resistance allele of CI...
October 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28983298/regulated-forms-of-cell-death-in-fungi
#14
REVIEW
A Pedro Gonçalves, Jens Heller, Asen Daskalov, Arnaldo Videira, N Louise Glass
Cell death occurs in all domains of life. While some cells die in an uncontrolled way due to exposure to external cues, other cells die in a regulated manner as part of a genetically encoded developmental program. Like other eukaryotic species, fungi undergo programmed cell death (PCD) in response to various triggers. For example, exposure to external stress conditions can activate PCD pathways in fungi. Calcium redistribution between the extracellular space, the cytoplasm and intracellular storage organelles appears to be pivotal for this kind of cell death...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28977579/the-rio1p-atpase-hinders-premature-entry-into-translation-of-late-pre-40s-pre-ribosomal-particles
#15
Kamila Belhabich-Baumas, Clément Joret, Beáta E Jády, Célia Plisson-Chastang, Ramtin Shayan, Christophe Klopp, Anthony K Henras, Yves Henry, Annie Mougin
Cytoplasmic maturation of precursors to the small ribosomal subunit in yeast requires the intervention of a dozen assembly factors (AFs), the precise roles of which remain elusive. One of these is Rio1p that seems to intervene at a late step of pre-40S particle maturation. We have investigated the role played by Rio1p in the dynamic association and dissociation of AFs with and from pre-40S particles. Our results indicate that Rio1p depletion leads to the stalling of at least 4 AFs (Nob1p, Tsr1p, Pno1p/Dim2p and Fap7p) in 80S-like particles...
October 13, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28957585/identification-and-characterization-of-bacterial-symbionts-in-three-species-of-filth-fly-parasitoids
#16
Kfir Betelman, Ayelet Caspi-Fluger, Maayan Shamir, Elad Chiel
Facultative bacterial symbionts are widespread among insects and have diverse effects on their biology. Here, we focused on bacterial symbionts of three ecologically and economically important filth flies parasitoid species-Spalangia cameroni, Spalangia endius and Muscidifurax raptor. Both Spalangia species harbored a Sodalis bacterium that is closely related to Spalangia praecaptivus (a free-living bacterium) and to Sodalis symbionts of weevils. This is the only case of Sodalis infection in the important order Hymenoptera...
September 1, 2017: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/28913925/a-cascade-of-destabilizations-combining-wolbachia-and-allee-effects-to-eradicate-insect-pests
#17
Julie C Blackwood, Roger Vargas, Xavier Fauvergue
The management of insect pests has long been dominated by the use of chemical insecticides, with the aim of instantaneously killing enough individuals to limit their damage. To minimize unwanted consequences, environmentally friendly approaches have been proposed that utilize biological control and take advantage of intrinsic demographic processes to reduce pest populations. We address the feasibility of a novel pest management strategy based on the release of insects infected with Wolbachia, which causes cytoplasmic incompatibilities in its host population, into a population with a pre-existing Allee effect...
September 15, 2017: Journal of Animal Ecology
https://www.readbyqxmd.com/read/28906572/culex-torrentium-mosquitoes-from-germany-are-negative-for-wolbachia
#18
M Leggewie, R Krumkamp, M Badusche, A Heitmann, S Jansen, J Schmidt-Chanasit, E Tannich, S C Becker
Wolbachia (Rickettsiales: Anaplasmataceae) infects a wide range of arthropods, including several mosquito species. The bacterium is known to induce a plethora of phenotypes in its host, examples being the reproductive phenotype cytoplasmic incompatibility or resistance against infection with arboviruses. The latter is especially relevant when assessing the vector competence of mosquito species for emerging arboviruses. Thus, knowledge of Wolbachia infection status is important for the assessment of vector competence...
September 14, 2017: Medical and Veterinary Entomology
https://www.readbyqxmd.com/read/28902188/reproductive-interference-and-fecundity-affect-competitive-interactions-of-sibling-species-with-low-mating-barriers-experimental-and-theoretical-evidence
#19
M Gebiola, S E Kelly, L Velten, R Zug, P Hammerstein, M Giorgini, M S Hunter
When allopatric species with incomplete prezygotic isolation come into secondary contact, the outcome of their interaction is not easily predicted. The parasitoid wasp Encarsia suzannae (iES), infected by Cardinium inducing cytoplasmic incompatibility (CI), and its sibling species E. gennaroi (EG), not infected by bacterial endosymbionts, may have diverged because of the complementary action of CI and asymmetric hybrid incompatibilities. Whereas postzygotic isolation is now complete because of sterility of F1 hybrid progeny, prezygotic isolation is still incipient...
December 2017: Heredity
https://www.readbyqxmd.com/read/28878066/cytological-analysis-of-cytoplasmic-incompatibility-induced-by-cardinium-suggests-convergent-evolution-with-its-distant-cousin-wolbachia
#20
Marco Gebiola, Massimo Giorgini, Suzanne E Kelly, Matthew R Doremus, Patrick M Ferree, Martha S Hunter
Cytoplasmic incompatibility (CI) is a conditional sterility in numerous arthropods that is caused by inherited, intracellular bacteria such as Wolbachia Matings between males carrying CI-inducing Wolbachia and uninfected females, or between males and females infected with different Wolbachia strains, result in progeny that die during very early embryogenesis. Multiple studies in diploid (Drosophila) and haplodiploid (Nasonia) insects have shown that CI-Wolbachia cause a failure of the paternally derived chromatin from resolving into distinct chromosomes...
September 13, 2017: Proceedings. Biological Sciences
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