| a comparative study in porcellio laevis (lat.) and armadillidium vulgare (lat.): response to temperature, photoperiod and oxygen concentration. | relationship of body weight, imposed fasting, temperature, light intensity, and oxygen concentration to oxygen consumption in porcellio laevis and armadillidium vulgare has been investigated in a series of laboratory experiments. it was observed that (1) the metabolic response in the two species to temperature change was a uniform increase of oxygen consumption with increasing temperature from 15 degrees c to 60 degrees c. beyond 30 degrees c, the oxygen consumption in each species fell, and the ... | 1979 | 93887 |
| horizontal transfer of parasitic sex ratio distorters between crustacean hosts. | parasitic sex distorters were artificially transferred within and between crustacean host species in order to study the effects of parasitism on host fitness and sex determination and to investigate parasite host specificity. implantation of nosema sp. to uninfected strains of its gammarus duebeni host resulted in an active parasite infection in the gonad of recipient females and subsequent transovarial parasite transmission. the young of artificially infected females were feminized by the paras ... | 1998 | 9695096 |
| the structure of a glycosylated protein hormone responsible for sex determination in the isopod, armadillidium vulgare. | two glycoforms (ah1 and ah2) of androgenic hormone, and its corresponding hormone precursor derived from hplc-purified androgenic gland extract from the woodlouse armadillidium vulgare were fully characterized by microsequencing and mass spectrometry. the amino-acid sequences of the two glycoforms were identical; they consist of two peptide chains, a and b, of 29 and 44 amino acids, respectively, with chain a carrying one n-glycosylated moiety on asn18. the two chains are linked by two disulfide ... | 1999 | 10411634 |
| immunohistochemical study of androgenic gland hormone: localization in the male reproductive system and species specificity in the terrestrial isopods. | androgenic gland hormone (agh) is responsible for male sexual differentiation in crustaceans. agh of the terrestrial isopod, armadillidium vulgare, is a heterodimetric glycoprotein. to determine the distribution of agh in the male reproductive system, an immunohistochemical study was carried out using antibodies raised against different components of the proagh molecule of a. vulgare, for example, the whole molecule of recombinant proagh expressed in escherichia coli (e. coli-ragh), the n-termin ... | 2002 | 11884067 |
| repellents in the japanese cedar, cryptomeria japonica, against the pill-bug, armadillidium vulgare. | sandaracopimarinol and (1s,6r)-2,7(14),10-bisabolatrien-1-ol-4-one were isolated and identified from cryptomeria japonica as repellents against armadillidium vulgare which is well known as an unpleasant pest in the house and as vegetable pest in japan. these compounds strongly repelled a. vulgare when they were combined, although each compound alone did not show any activity. | 2002 | 12506982 |
| effects of sampling, preparation and defecation on metal concentrations in selected invertebrates at urban sites. | in order to obtain basic information for designing standardized test preparation methods, the heavy metals zn, cu, cd and pb were measured in gastropods (xerolenta obvia), oligochaetes (lumbricus terrestris), isopods (armadillidium vulgare, trachelipus rathkei) and carabids (harpalus rubripes, calathus fuscipes) using different sampling methods and different modes of sample treatment. in some of the experiments, higher zn, cd and pb, and lower cu-contents were observed in isopods and carabids tr ... | 2003 | 12820990 |
| sexual differentiation traits in functional males with female genital apertures (male symbol fga) in the woodlice armadillidium vulgare latr. (isopoda, crustacea). | this study reports the results of examination of the gonadal morphology and ultrastructural features of the androgenic hormone (ah)-producing androgenic gland cells of laboratory stocks of functional male woodlice, armadillidium vulgare, with female genital apertures ( male symbol fga), with and without experimentally induced infections of the sex-ratio-distorting endobacterial parasite, wolbachia. males ( male symbol fga) have been reported in wild populations containing individuals infected wi ... | 2004 | 15242750 |
| armadillidin h, a glycine-rich peptide from the terrestrial crustacean armadillidium vulgare, displays an unexpected wide antimicrobial spectrum with membranolytic activity. | antimicrobial peptides (amps) are key components of innate immunity and are widespread in nature, from bacteria to vertebrate animals. in crustaceans, there are currently 15 distinct amp families published so far in the literature, mainly isolated from members of the decapoda order. up to now, armadillidin is the sole non-decapod amp isolated from the haemocytes of armadillidium vulgare, a crustacean isopod. its first description demonstrated that armadillidin is a linear glycine-rich (47%) cati ... | 2016 | 27713732 |
| the mutualistic side of wolbachia-isopod interactions: wolbachia mediated protection against pathogenic intracellular bacteria. | wolbachia is a vertically transmitted endosymbiont whose radiative success is mainly related to various host reproductive manipulations that led to consider this symbiont as a conflictual reproductive parasite. however, lately, some wolbachia have been shown to act as beneficial symbionts by protecting hosts against a broad range of parasites. still, this protection has been mostly demonstrated in artificial wolbachia-host associations between partners that did not co-evolved together. here, we ... | 2015 | 26733946 |
| characterization and transcriptional analysis of two gene clusters for type iv secretion machinery in wolbachia of armadillidium vulgare. | wolbachia are maternally inherited alpha-proteobacteria that induce feminization of genetic males in most terrestrial crustacean isopods. two clusters of vir genes for a type iv secretion machinery have been identified at two separate loci and characterized for the first time in a feminizing wolbachia. furthermore, we demonstrated that these operons are transcriptionally active in ovaries and in all other tissues tested, suggesting that t4ss has a significant role in wolbachia biology. these obs ... | 2008 | 18582562 |
| comparative paleovirological analysis of crustaceans identifies multiple widespread viral groups. | the discovery of many fragments of viral genomes integrated in the genome of their eukaryotic host (endogenous viral elements; eves) has recently opened new avenues to further our understanding of viral evolution and of host-virus interactions. here, we report the results of a comprehensive screen for eves in crustaceans. following up on the recent discovery of eves in the terrestrial isopod, armadillidium vulgare, we scanned the genomes of six crustacean species: a terrestrial isopod (armadilli ... | 2015 | 26388953 |
| remarkable diversity of endogenous viruses in a crustacean genome. | recent studies in paleovirology have uncovered myriads of endogenous viral elements (eves) integrated in the genome of their eukaryotic hosts. these fragments result from endogenization, that is, integration of the viral genome into the host germline genome followed by vertical inheritance. so far, most studies have used a virus-centered approach, whereby endogenous copies of a particular group of viruses were searched in all available sequenced genomes. here, we follow a host-centered approach ... | 0 | 25084787 |
| the terrestrial isopod microbiome: an all-in-one toolbox for animal-microbe interactions of ecological relevance. | bacterial symbionts represent essential drivers of arthropod ecology and evolution, influencing host traits such as nutrition, reproduction, immunity, and speciation. however, the majority of work on arthropod microbiota has been conducted in insects and more studies in non-model species across different ecological niches will be needed to complete our understanding of host-microbiota interactions. in this review, we present terrestrial isopod crustaceans as an emerging model organism to investi ... | 2016 | 27721806 |
| protein profiling of hemocytes from the terrestrial crustacean armadillidium vulgare. | to establish and maintain a successful infection, microbial pathogens have evolved various strategies to infect the host in the face of a functional immune system. in this context, the alpha-proteobacteria wolbachia capacities to infect new host species have been greatly evidenced. indeed, in terrestrial isopods, experimentally transferred wolbachia invade all host tissues, including immune cells such as hemocytes. to investigate mechanisms that have to be avoided by bacteria to maintain themsel ... | 2008 | 18329099 |
| feminizing wolbachia: a transcriptomics approach with insights on the immune response genes in armadillidium vulgare. | wolbachia are vertically transmitted bacteria known to be the most widespread endosymbiont in arthropods. they induce various alterations of the reproduction of their host, including feminization of genetic males in isopod crustaceans. in the pill bug armadillidium vulgare, the presence of wolbachia is also associated with detrimental effects on host fertility and lifespan. deleterious effects have been demonstrated on hemocyte density, phenoloxidase activity, and natural hemolymph septicemia, s ... | 2012 | 22375708 |
| intra-cellular bacterial infections affect learning and memory capacities of an invertebrate. | how host manipulation by parasites evolves is fascinating but challenging evolutionary question remains. many parasites share the capacity to manipulate host behavior increasing their transmission success. however, little is known about the learning and memory impact of parasites on their host. wolbachia are widespread endosymbionts and infect most insect species. these bacteria are maternally transmitted and mainly alter the reproduction of hosts with weak virulence. we tested the impact of par ... | 2015 | 26675213 |
| cannibalism and predation as paths for horizontal passage of wolbachia between terrestrial isopods. | the alpha-proteobacteria wolbachia are the most widespread endosymbionts in arthropods and nematodes. mainly maternally inherited, these so-called sex parasites have selected several strategies that increase their vertical dispersion in host populations. however, the lack of congruence between the wolbachia and their host phylogenies suggests frequent horizontal transfers. one way that could be used for horizontal wolbachia transfers between individuals is predation. the aim of this study was to ... | 2013 | 23593179 |
| morphological and physiological development of anterior thoracic stretch receptors in two isopods, armadillidium vulgare and ligia exotica. | abdominal muscle receptor organs (mros) monitor the position and movement of abdomen in crustaceans. thoracic segments of decapods are fused and immovable. it is speculated that mros had retrograded simple shape, n-cells that lost receptor muscles, a receptor cell and accessory nerves. we focused on the effect of segmental movement in respect to thoracic n-cells and mros in isopods that have movable thoracic segments. armadillidium vulgare rolled up its body segments. ligia exotica swam by quick ... | 2007 | 17473927 |
| evidence for a new feminizing wolbachia strain in the isopod armadillidium vulgare: evolutionary implications. | wolbachia are intracellular maternally inherited alpha-proteobacteria infecting a wide range of arthropods. in the common pill bug armadillidium vulgare, the known wolbachia strain is responsible for feminization of genetic males. we have investigated wolbachia diversity in 20 populations of a. vulgare from west and east europe, north africa and north america. a new wolbachia strain (wvulm) was identified through the variability of the wsp gene, distantly related to that previously known (wvulc) ... | 2004 | 15138452 |
| mechanisms of parasite-induced sex reversal in gammarus duebeni. | the amphipod gammarus duebeni is host to the feminising microsporidian parasite nosema granulosis that converts males into functional females. to test the hypothesis that the parasite acts through endocrine disruption we compared the morphology of the gonad and activity of the androgenic gland, which coordinates male sexual differentiation, in infected and uninfected animals. male gonad consisted of testis, seminal vesicle and vas deferens that was anchored to the genital papilla on segment 7. t ... | 2004 | 15111096 |
| debaryomyces mycophilus sp. nov., a siderophore-dependent yeast isolated from woodlice. | four strains of an ascogenous yeast were isolated from the guts of the woodlice species armadillidium vulgare (latreille). this yeast differed from all known yeasts by its inability to grow in culture without the presence of a metabolite produced by some common soil fungi such as cladosporium cladosporioides, aspergillus alliaceus, and penicillium spp. phylogenetic analysis based on 18s rdna and 26s rdna (domain d1/d2) sequences indicated that the yeast represents a new taxon in the genus debary ... | 2002 | 12702293 |
| localization of crustacean hyperglycemic and vitellogenesis-inhibiting hormones in separate cell types in the protocerebrum of the woodlouse armadillidium vulgare (crustacea, isopoda). | we gave an accurate immunolocalization of chh (crustacean hyperglycemic hormone) and vih (vitellogenesis-inhibiting hormone) in the brain and the sinus gland of the woodlouse armadillidium vulgare. the two immune sera have been respectively raised against hplc-purified chh and against a small peptide derived from the n-terminus of vih. by immunocytochemistry, we showed that chh and vih were synthesized in different perikarya and stored in different axon endings of the sinus gland. as in other cr ... | 2003 | 12679090 |
| horizontal transfers of feminizing versus non-feminizing wolbachia strains: from harmless passengers to pathogens. | the endosymbiont wolbachia pipientis infects various hosts in which it navigates vertically from mothers to offspring. however, horizontal transfers of wolbachia can occur between hosts. the virulence of the horizontally acquired wolbachia can change in the new host as it has been illustrated by the case of the feminizing strain wvulc from the woodlouse armadillidium vulgare that turns to a pathogen when introduced into porcellio dilatatus dilatatus. in the present study, we aim to show whether ... | 2013 | 23802876 |
| preparation of an active recombinant peptide of crustacean androgenic gland hormone. | in crustaceans, male sexual characteristics are induced by a hormone referred to as androgenic gland hormone. we have recently cloned a candidate cdna in the terrestrial isopod armadillidium vulgare. in order to prove that this cdna encodes the hormone, recombinant single-chain precursor molecules consisting of b chain, c peptide and a chain were produced using both baculovirus and bacterial expression systems. neither recombinant precursors showed activity. digestion of only the precursor carry ... | 2002 | 11836008 |
| masculinization of female isopods (crustacea) correlated with non-mendelian inheritance of cytoplasmic viruses. | when in genetic females external male characters differentiate, the phenomenon is called "male pseudohermaphroditism." this male differentiation occurs in terrestrial isopods (crustacea, suborder oniscoidea) and sometimes involves only some epithelial areas (gynandromorphous mosaics). it is not induced by male hormones or by abnormal ovary function. this intersexuality is transmitted maternally (by the intersex females) or paternally (by the brothers of intersex females) to between 30% and 60% o ... | 1991 | 11607243 |
| an ethylene-protected achilles' heel of etiolated seedlings for arthropod deterrence. | a small family of kunitz protease inhibitors exists in arabidopsis thaliana, a member of which (encoded by at1g72290) accomplishes highly specific roles during plant development. arabidopsis kunitz-protease inhibitor 1 (kunitz-pi;1), as we dubbed this protein here, is operative as cysteine pi. activity measurements revealed that despite the presence of the conserved kunitz-motif the bacterially expressed kunitz-pi;1 was unable to inhibit serine proteases such as trypsin and chymotrypsin, but ver ... | 2016 | 27625656 |
| wolbachia endosymbiont responsible for cytoplasmic incompatibility in a terrestrial crustacean: effects in natural and foreign hosts. | wolbachia bacteria are vertically transmitted endosymbionts that disturb the reproduction of many arthropods thereby enhancing their spread in host populations. wolbachia are often responsible for changes of sex ratios in terrestrial isopods, a result of the feminization of genotypic males. here we found that the wolbachia hosted by cylisticus convexus (wcc) caused unidirectional cytoplasmic incompatibility (ci), an effect commonly found in insects. to understand the diversity of wolbachia-induc ... | 2001 | 11488969 |
| mitochondrial dna polymorphism, sex ratio distorters and population genetics in the isopod armadillidium vulgare. | two maternally inherited sex ratio distorters (srd) impose female-biased sex ratios on the wood louse armadillidium vulgare by feminizing putative males. these srd are (i) an intracytoplasmic bacterium of the genus wolbachia, and (ii) another non-mendelian element of unknown nature: the f element. mitochondrial dna variation was investigated in a. vulgare field populations to trace the evolution of host-srd relationships and to investigate the effect of srd on host cytoplasmic polymorphism. the ... | 1999 | 10430591 |
| conflict between feminizing sex ratio distorters and an autosomal masculinizing gene in the terrestrial isopod armadillidium vulgare latr. | female sex determination in the pill bug armadillidium vulgare is frequently under the control of feminizing parasitic sex factors (psf). one of these psf is an intracytoplasmic wolbachia-like bacterium (f), while the other (f) is suspected of being an f-bacterial dna sequence unstably integrated into the host genome. in most wild populations harboring psf, all individuals are genetic males (zz), and female phenotypes occur only due to the presence of psf which overrides the male determinant car ... | 1993 | 8436273 |
| mitochondrial dna polymorphism and feminizing sex factors dynamics in a natural population of armadillidium vulgare (crustacea, isopoda). | sex determination in armadillidium vulgare may be under the control of two parasitic sex factors that reverse genetic males into functional neo-females. the first feminizing factor (f) is a wolbachia and the other (f) is probably a sequence of the f bacterial dna unstably integrated into the host genome. both of these feminizing factors are mainly maternally transmitted. here we investigate the mitochondrial dna polymorphism of wild iso-female lineages harbouring either f or f. among the four ha ... | 1993 | 8163156 |
| comparative anatomy of serotonin-like immunoreactive neurons in isopods: putative homologues in several species. | it is now commonly accepted that the arthropod nervous system has evolved only once, and so homologies between crustacean and insect nervous systems can be meaningfully sought. to do this, we have examined the distribution of serotonin (5-hydroxytryptamine)-like immunoreactive neurons in the central nervous system (cns) of four common british isopods. two species of terrestrial woodlouse, oniscus asellus and armadillidium vulgare, the littoral sea slater, ligia oceanica, and the aquatic water ho ... | 1994 | 7814675 |
| twenty-five new viruses associated with the drosophilidae (diptera). | drosophila melanogaster is an important laboratory model for studies of antiviral immunity in invertebrates, and drosophila species provide a valuable system to study virus host range and host switching. here, we use metagenomic rna sequencing of about 1600 adult flies to discover 25 new rna viruses associated with six different drosophilid hosts in the wild. we also provide a comprehensive listing of viruses previously reported from the drosophilidae. the new viruses include iflaviruses, rhabdo ... | 2016 | 27375356 |
| [genetic study on the intersexuality of males with female genital apertures in the oniscoid armadillidium vulgare latr.: interpretation and modalities of hereditary transmission]. | the males with female genital apertures of the niort population of a. vulgare are genetic males that have been made intersexual by two factors which are probably epigenetic : one is feminizing, the other masculinizing. the transmission of the masculinizing factor seems to be controlled by a genetic mechanism which, in the crossing of an intersexe with a genetic female, makes half the female issue turn into neo-males and intersexes. | 2002 | 134814 |
| targeted genome enrichment for efficient purification of endosymbiont dna from host dna. | wolbachia endosymbionts are widespread in arthropods and are generally considered reproductive parasites, inducing various phenotypes including cytoplasmic incompatibility, parthenogenesis, feminization and male killing, which serve to promote their spread through populations. in contrast, wolbachia infecting filarial nematodes that cause human diseases, including elephantiasis and river blindness, are obligate mutualists. dna purification methods for efficient genomic sequencing of these uncult ... | 2012 | 23482460 |
| effects of parasitic sex-ratio distorters on host genetic structure in the armadillidium vulgare-wolbachia association. | in the pill bug armadillidium vulgare (crustacea, oniscidea), wolbachia facilitates its spread through vertical transmission via the eggs by inducing feminization of genetic males. the spread of feminizing wolbachia within and across populations is therefore expected to influence mitochondrial dna (mtdna) genetic structure by hitchhiking. to test this hypothesis, we analysed nuclear and mtdna genetic structure, and wolbachia prevalence in 13 populations of the pill bug host. wolbachia prevalence ... | 2011 | 22188300 |
| the immune cellular effectors of terrestrial isopod armadillidium vulgare: meeting with their invaders, wolbachia. | most of crustacean immune responses are well described for the aquatic forms whereas almost nothing is known for the isopods that evolved a terrestrial lifestyle. the latter are also infected at a high prevalence with wolbachia, an endosymbiotic bacterium which affects the host immune system, possibly to improve its transmission. in contrast with insect models, the isopod armadillidium vulgare is known to harbor wolbachia inside the haemocytes. | 2011 | 21533137 |
| variations of immune parameters in terrestrial isopods: a matter of gender, aging and wolbachia. | ecological factors modulate animal immunocompetence and potentially shape the evolution of their immune systems. not only environmental parameters impact on immunocompetence: aging is one major cause of variability of immunocompetence between individuals, and sex-specific levels of immunocompetence have also been frequently described. moreover, a growing core of data put in light that vertically transmitted symbionts can dramatically modulate the immunocompetence of their hosts. in this study, w ... | 2010 | 20676599 |
| body shape in terrestrial isopods: a morphological mechanism to resist desiccation? | woodlice are fully terrestrial crustaceans and are known to be sensitive to water loss. their half-ellipsoidal shapes represent simple models in which to investigate theoretical assumptions about organism morphology and rates of exchange with the environment. we examine the influence of surface area and mass on the desiccation rates in three eco-morphologically different species of woodlice: oniscus asellus, porcellio scaber, and armadillidium vulgare. our analysis indicates that the rate of wat ... | 2015 | 26289755 |
| streptomyces coacervatus sp. nov., isolated from the intestinal tract of armadillidium vulgare. | a gram-staining-positive bacterium, designated as-0823(t), which formed spiral spore chains on the aerial mycelium, was isolated from the intestinal tract of armadillidium vulgare, a small terrestrial crustacean commonly found on the ground around houses in japan. 16s rrna gene sequence analysis showed that the isolate belonged to the genus streptomyces and was most closely related to streptomyces longisporus isp 5166(t) (98.6 % 16s rrna gene sequence similarity), streptomyces curacoi nbrc 12761 ... | 2011 | 20525817 |
| the expression of one ankyrin pk2 allele of the wo prophage is correlated with the wolbachia feminizing effect in isopods. | the maternally inherited α-proteobacteria wolbachia pipientis is an obligate endosymbiont of nematodes and arthropods, in which they induce a variety of reproductive alterations, including cytoplasmic incompatibility (ci) and feminization. the genome of the feminizing wvulc wolbachia strain harboured by the isopod armadillidium vulgare has been sequenced and is now at the final assembly step. it contains an unusually high number of ankyrin motif-containing genes, two of which are homologous to t ... | 2012 | 22497736 |
| pathogenic effect of entomopathogenic nematode-bacterium complexes on terrestrial isopods. | in this study, we evaluated the effect of entomopathogenic nematodes (epns) steinernema carpocapsae, steinernema feltiae and heterorhabditis bacteriophora, symbiotically associated with bacteria of the genera xenorhabdus or photorhabdus, on the survival of eight terrestrial isopod species. the epn species s. carpocapsae and h. bacteriophora reduced the survival of six isopod species while s. feltiae reduced survival for two species. two terrestrial isopod species tested (armadillidium vulgare an ... | 2008 | 18346756 |
| nine new cytochalasan alkaloids from chaetomium globosum tw1-1 (ascomycota, sordariales). | chemical investigation on the methanol extract of chaetomium globosum tw1-1, a fungus isolated from the common pillbug (armadillidium vulgare), has resulted in the isolation of nine new highly oxygenated cytochalasan alkaloids, armochaetoglobins s-z (1 and 3-9) and 7-o-acetylarmochaetoglobin s (2), together with eight structurally related known analogues (10-17). their structures and absolute configurations were elucidated by spectroscopic analyses. among them, compound 2 presents to be the firs ... | 2016 | 26739896 |
| armochaetoglobins a-j: cytochalasan alkaloids from chaetomium globosum tw1-1, a fungus derived from the terrestrial arthropod armadillidium vulgare. | ten new cytochalasan alkaloids, termed armochaetoglobins a-j (1-10), and four known chaetoglobosins (11-14) were isolated from a methanol extract of chaetomium globosum tw1-1, a fungus isolated from the medicinal terrestrial arthropod armadillidium vulgare. their structures were elucidated by a combination of spectroscopy, single-crystal x-ray crystallography, and ecd calculations. armochaetoglobins a-e (1-5) represented the first examples of seco-chaetoglobosins arising from an oxidative cleava ... | 2015 | 26068802 |
| bacteriophage wo in wolbachia infecting terrestrial isopods. | wolbachia are maternally inherited intracellular alpha-proteobacteria that infect a wide range of arthropods. they are associated with a number of different reproductive phenotypes in arthropods and nematodes. in isopod crustacean, wolbachia are responsible for feminization of genetic males in many species, and for cytoplasmic incompatibility in two species. in this paper, we report the first detection of phage wo from wolbachia infecting terrestrial isopods. all wolbachia strains tested in this ... | 2005 | 16198306 |
| armadillidin: a novel glycine-rich antibacterial peptide directed against gram-positive bacteria in the woodlouse armadillidium vulgare (terrestrial isopod, crustacean). | we report the isolation and the characterization of a novel antibacterial peptide from hemocytes of the woodlouse armadillidium vulgare, naturally infected or uninfected by wolbachia, an intracellular gram-negative bacterium. this molecule displays antibacterial activity against gram-positive bacteria despite its composition which classes it into the glycine-rich antibacterial peptide family, usually directed against fungi and gram-negative bacteria. the complete sequence was determined by a com ... | 2004 | 15752546 |
| a cost of wolbachia-induced sex reversal and female-biased sex ratios: decrease in female fertility after sperm depletion in a terrestrial isopod. | a number of parasites are vertically transmitted to new host generations via female eggs. in such cases, host reproduction is an intimate component of parasite fitness and no cost of the infection on host reproduction is expected to evolve. a number of these parasites distort host sex ratios towards females, thereby increasing either parasite fitness or the proportion of the host that transmit the parasite. in terrestrial isopods (woodlice), wolbachia bacteria are responsible for sex reversion a ... | 2004 | 15347518 |
| armochaeglobines a and b, two new indole-based alkaloids from the arthropod-derived fungus chaetomium globosum. | armochaeglobines a (1) and b (2), two indole-based cytochalasan alkaloids with new carbon skeletons, were obtained from the fungus chaetomium globosum tw1-1, which was first isolated from the arthropod armadillidium vulgare. their structures were elucidated by extensive spectroscopic analyses, ecd calculation, and single-crystal x-ray diffraction analysis. interestingly, compound 1 featured a unique tetracyclic 5/6/7/5 fused ring system and 2 possessed a rare 12-membered carbon scaffold. | 2015 | 25615686 |
| in vivo visual evaluation of nanoparticle transfer in a three-species terrestrial food chain. | nanoparticles (nps) are increasingly being used, and they present the risk of being introduced into food webs. numerous studies have been conducted to evaluate the toxicological effects of nps in the aquatic and freshwater environments and their transfer to upper-level trophic organisms. however, information on the transfer and consequent effects of nps on soil invertebrates is still limited. in this study, we assessed the transfer of quantum dots (qds) through a three-species terrestrial food c ... | 2016 | 26933900 |
| strength of the pathogenicity caused by feminizing wolbachia after transfer in a new host: strain or dose effect? | the alphaproteobacteria wolbachia pipientis are among the most common and widespread symbionts in the animal world. their vertical transmission mode is predicted to favour genotypes with low virulence. on the contrary, horizontal transfers of wolbachia from one host to another have been shown to possibly increase the symbiont virulence. this situation has been previously described when two feminizing wolbachia strains, wvulc and wvulm, from the ovaries of the woodlouse armadillidium vulgare were ... | 2014 | 24345405 |
| isolation and characterization of microsatellite loci for the isopod crustacean armadillidium vulgare and transferability in terrestrial isopods. | armadillidium vulgare is a terrestrial isopod (crustacea, oniscidea) which harbors wolbachia bacterial endosymbionts. a. vulgare is the major model for the study of wolbachia-mediated feminization of genetic males in crustaceans. as a consequence of their impact on host sex determination mechanisms, wolbachia endosymbionts are thought to significantly influence a. vulgare evolution on various grounds, including population genetic structure, diversity and reproduction strategies. to provide molec ... | 2013 | 24098543 |
| one-step pcr amplification of complete arthropod mitochondrial genomes. | a new pcr primer set which enables one-step amplification of complete arthropod mitochondrial genomes was designed from two conserved 16s rdna regions for the long pcr technique. for this purpose, partial 16s rdnas amplified with universal primers 16sa and 16sb were newly sequenced from six representative arthropods: armadillidium vulgare and macrobrachium nipponense (crustacea), anopheles sinensis (insecta), lithobius forficatus and megaphyllum sp. (myriapoda), and limulus polyphemus (chelicera ... | 2001 | 11399145 |
| the effect of external marking on the behaviour of the common pill woodlouse armadillidium vulgare. | zoologists distinguish individual animals using marking techniques. generally they test the potential influence of marking on survival only; the influence on behaviour is usually neglected. we evaluated the influence of two external marking techniques (nail polish and queen-bee marker) on the behaviour of common pill woodlouse, armadillidium vulgare. the behaviour was examined from two points of view: (1) activity during 24 hours and (2) specific expressions of behaviour (exploring, feeding, res ... | 2012 | 22536105 |
| simultaneous multiple-depths en-face optical coherence tomography using multiple signal excitation of acousto-optic deflectors. | we present a novel low-coherence interferometer configuration, equipped with acousto-optic deflectors that can be used to simultaneously acquire up to eight time domain optical coherence tomography en-face images. the capabilities of the configuration are evaluated in terms of depth resolution, signal to noise ratio and crosstalk. then the configuration is employed to demonstrate simultaneous en-face optical coherence tomography imaging at five different depths in a specimen of armadillidium vul ... | 2013 | 23389175 |
| eco-morphological studies on pleopodal lungs and cuticle in armadillidium species (crustacea, isopoda, oniscidea). | terrestrial isopods (crustacea, isopoda, oniscidea) have adapted to land life by diverse morphological, physiological and behavioral changes. woodlice species exhibit a large variety in this respect, their preferences ranging from moist to dry habitats. these moisture preference values are related to various morphological adaptations, rendering terrestrial isopods amenable to studying morphological adaptations to terrestrial life. we performed a comparison of four armadillidium species (armadill ... | 2013 | 23376766 |
| [study on differentiation and extract determination of porcellio scaber and armadillidium vulgare]. | to identify consistency of the composition and efficacy of porcellio scaber and armadillidium vulgare and provide reference for the safe and scientific use of the medicinal material. | 2012 | 23320347 |
| crop residue and residue management effects on armadillidium vulgare (isopoda: armadillidiidae) populations and soybean stand densities. | in general, armadillidium vulgare (latreille) are considered nonpests of soybean [glycine max (l.) merrill], but changes in soil conservation practices have shifted the pest status of this organism from an opportunistic to a perennial, early-season pest in parts of central kansas. as a result, soybean producers that rotate with corn (zea mays l.) under conservation tillage practices have resorted to removing excess corn residue by using controlled burns. in a 2-yr field study (2009-2010), we dem ... | 2012 | 23156159 |
| water-soluble chlorophyll protein is involved in herbivore resistance activation during greening of arabidopsis thaliana. | water-soluble chlorophyll proteins (wscps) constitute a small family of unusual chlorophyll (chl)-binding proteins that possess a kunitz-type protease inhibitor domain. in arabidopsis thaliana, a wscp has been identified, named atwscp, that forms complexes with chl and the chl precursor chlorophyllide (chlide) in vitro. atwscp exhibits a quite unexpected expression pattern for a chl binding protein and accumulated to high levels in the apical hook of etiolated plants. atwscp expression was negat ... | 2015 | 26016527 |
| behavioral evidence for internal factors affecting duration of conglobation in pill bugs (armadillidium vulgare, isopoda, crustacea). short communication. | pill bugs individually walked an experimental pathway, then were induced to conglobate with a puff of air. after recovering, they were stimulated again. sixty of 80 pill bugs conglobated both times, first moving either antennae (a) or legs (l) during recovery. both aa and ll groups showed a significant positive correlation between first (t1) and second (t2) conglobation times. in the al group, pathway locomotion time (t0) was significantly positively correlated to both t1 and t2. we conclude tha ... | 2012 | 22776477 |
| detritivorous crustaceans become herbivores on jasmonate-deficient plants. | the jasmonate signal pathway is known to control defenses against herbivores, such as leaf eaters (folivores). does the reach of the pathway extend to defense against other types of animal? among the arthropods attracted to seed baits placed below flowering arabidopsis thaliana plants are 2 largely nocturnal isopod crustaceans generally considered as detritivores: porcellio scaber and armadillidium vulgare. parallel laboratory experiments identified the isopods as being capable of predation on i ... | 2009 | 19139394 |
| discontinuous ammonia excretion and glutamine storage in littoral oniscidea (crustacea: isopoda): testing tidal and circadian models. | a key evolutionary development facilitating land colonization in terrestrial isopods (isopoda: oniscidea) is the intermittent liberation of waste nitrogen as volatile ammonia. intermittent ammonia release exploits glutamine (gln) as an intermediary nitrogen store. here, we explore the relationship between temporal patterns of ammonia release and gln accumulation in three littoral oniscideans from southern california. results are interpreted in terms of water availability, habitat, activity patte ... | 2013 | 22836297 |
| evaluation of antinociceptive and anti-inflammatory effects of aqueous extract of armadillidium vulgare latreille. | to assess the antinociceptive and anti-inflammatory properties of the aqueous extract of armadillidium vulgare (av). | 2017 | 28265851 |
| birth of a w sex chromosome by horizontal transfer of wolbachia bacterial symbiont genome. | sex determination is a fundamental developmental pathway governing male and female differentiation, with profound implications for morphology, reproductive strategies, and behavior. in animals, sex differences between males and females are generally determined by genetic factors carried by sex chromosomes. sex chromosomes are remarkably variable in origin and can differ even between closely related species, indicating that transitions occur frequently and independently in different groups of org ... | 2016 | 27930295 |
| host origin and tissue microhabitat shaping the microbiota of the terrestrial isopod armadillidium vulgare. | we present the first in-depth investigation of the host-associated microbiota of the terrestrial isopod crustacean armadillidium vulgare. this species is an important decomposer of organic matter in terrestrial ecosystems and a major model organism for arthropod-wolbachia symbioses due to its well-characterized association with feminizing wolbachia 16s rrna gene pyrotags were used to characterize its bacterial microbiota at multiple levels: (i) in individuals from laboratory lineages and field p ... | 2016 | 27004796 |
| isolation, characterization and pcr multiplexing of microsatellite loci for two sub-species of terrestrial isopod porcellio dilatatus (crustacea, oniscidea). | several microsatellite markers have already been developed for different terrestrial isopod species such as armadillidium vulgare, a. nasatum and porcellionides pruinosus. in all these species, the endosymbiont wolbachia has a feminizing effect that generates a female bias in sex ratio and reduces the number of reproductive males. thus this can potentially decrease the genetic diversity of host populations. however, in some other isopod species, wolbachia induces cytoplasmic incompatibility (ci) ... | 2016 | 26943350 |
| [chemical constituents of armadillidium vulgare]. | to study the chemical constituents of armadillidium vulgare. | 2015 | 26672331 |
| in vivo ion fluxes across the eggs of armadillidium vulgare (oniscidea: isopoda): the role of the dorsal organ. | the thin-walled, lecithotrophic eggs of land isopods (suborder oniscidea) are brooded in a fluid-filled maternal marsupium until a few days following the second embryonic molt. eggs of armadillidium vulgare possess a well-developed dorsal organ underlying a broad silver-staining saddle on the vitelline membrane. based on its chloride permeability and known transport functions in planktotrophic crustaceans, we hypothesized that the dorsal organ functions in passive or active ion movements. to stu ... | 2013 | 20465420 |
| self-corrective behavior for turn alternation in pill bugs (armadillidium vulgare). | pill bugs (armadillidium vulgare) demonstrate a behavior called turn alternation that keeps their overall direction of movement straight after obstacles in experimental settings force them to deviate from a course. for example, this behavior is seen when they alternate their path choice on successive trials of the t-maze test. however, sometimes pill bugs stop after turning and change their direction (directional change). the function of this directional change has not been investigated because ... | 2016 | 26621257 |
| spatial distribution of calcite and amorphous calcium carbonate in the cuticle of the terrestrial crustaceans porcellio scaber and armadillidium vulgare. | the crustacean cuticle is an interesting model to study the properties of mineralized bio-composites. the cuticle consists of an organic matrix composed of chitin-protein fibres associated with various amounts of crystalline and amorphous calcium carbonate. it is thought that in isopods the relative amounts of these mineral polymorphs depend on its function and the habitat of the animal. in addition to the composition, the distribution of the various components should affect the properties of th ... | 2008 | 18550385 |
| conglobation in the pill bug, armadillidium vulgare, as a water conservation mechanism. | water balance of the terrestrial isopod, armadillidium vulgare, was investigated during conglobation (rolling-up behavior). water loss and metabolic rates were measured at 18 +/- 1 degrees c in dry air using flow-through respirometry. water-loss rates decreased 34.8% when specimens were in their conglobated form, while co2 release decreased by 37.1%. water loss was also measured gravimetrically at humidities ranging from 6 to 75 %rh. conglobation was associated with a decrease in water-loss rate ... | 2008 | 20233103 |
| large gene overlaps and trna processing in the compact mitochondrial genome of the crustacean armadillidium vulgare. | a faithful expression of the mitochondrial dna is crucial for cell survival. animal mitochondrial dna (mtdna) presents a highly compact gene organization. the typical 16.5 kbp animal mtdna encodes 13 proteins, 2 rrnas and 22 trnas. in the backyard pillbug armadillidium vulgare, the rather small 13.9 kbp mtdna encodes the same set of proteins and rrnas as compared to animal kingdom mtdna, but seems to harbor an incomplete set of trna genes. here, we first confirm the expression of 13 trna genes i ... | 2015 | 26361137 |
| mitochondrial genome haplotype hypervariation within the isopod parasitic nematode thaumamermis cosgrovei. | characterization of mitochondrial genomes from individual thaumamermis cosgrovei nematodes, obligate parasites of the isopod armadillidium vulgare, revealed that numerous mtdna haplotypes, ranging in size from 19 to 34 kb, are maintained in several spatially separated isopod populations. the magnitude and frequency of conspecific mtdna size variation is unprecedented among all studied size-polymorphic metazoan mitochondrial genomes. to understand the molecular basis of this hypervariation, compl ... | 2007 | 17435228 |
| draft genome sequence of "candidatus hepatoplasma crinochetorum" ps, a bacterial symbiont in the hepatopancreas of the terrestrial isopod porcellio scaber. | "candidatus hepatoplasma crinochetorum" ps is an extracellular symbiont residing in the hepatopancreas of the terrestrial isopod porcellio scaber. its genome is highly similar to that of the close relative "ca. hepatoplasma crinochetorum" av from armadillidium vulgare. however, instead of a clustered regularly interspaced short palindromic repeat (crispr)-cas system, it encodes a type i restriction modification system. | 2015 | 26272556 |
| feminization of the isopod cylisticus convexus after transinfection of the wvulc wolbachia strain of armadillidium vulgare. | reproductive parasites such as wolbachia are able to manipulate the reproduction of their hosts by inducing parthenogenesis, male-killing, cytoplasmic incompatibility or feminization of genetic males. despite extensive studies, no underlying molecular mechanism has been described to date. the goal of this study was to establish a system with a single wolbachia strain that feminizes two different isopod species to enable comparative analyses aimed at elucidating the genetic basis of feminization. ... | 2015 | 26047139 |
| metallothioneins and heat shock proteins 70 in armadillidium vulgare (isopoda, oniscidea) exposed to cadmium and lead. | the heavy metals bioaccumulation capability in armadillidium vulgare feeded with chestnut leaves contaminated with various sublethal concentrations of cd and pb, was evaluated under laboratory conditions. the metal concentration found in the hepatopancreas of treated animals, as measured by inductively coupled plasma mass spectrometry (icp-ms), affected the expression and localization of mt and hsp70 as shown by immunohistochemical and western blotting analysis. the cd content of the animals tre ... | 2015 | 25779333 |
| bioaccumulation of cadmium and lead and its effects on hepatopancreas morphology in three terrestrial isopod crustacean species. | this study was designed to compare cadmium (cd) and lead (pb) bioaccumulation in three species of oniscidean isopods - armadillidium granulatum brandt, armadillidium vulgare (latreille) and porcellio laevis latreille which were exposed for three weeks to a contaminated diet, and to determine the morphological and ultrastructural changes in hepatopancreas. metal accumulation, determined by inductively coupled plasma mass spectrometry (icp-ms), was linearly associated with the exposed concentratio ... | 2014 | 25279851 |
| do predator cues influence turn alternation behavior in terrestrial isopods porcellio laevis latreille and armadillidium vulgare latreille? | terrestrial isopods (crustacea: oniscidea) make more alternating maze turns in response to negative stimuli, a navigational behavior that corrects divergence from a straight line. the present study investigates this behavioral pattern in two species, porcellio laevis latreille and armadillidium vulgare latreille, in response to short-term vs. long-term exposure to indirect cues from predatory ants. neither isopod species increased the number of alternating turns in response to short-term indirec ... | 2014 | 24954552 |
| ultrastructural characterization and multilocus sequence analysis (mlsa) of 'candidatus rickettsiella isopodorum', a new lineage of intracellular bacteria infecting woodlice (crustacea: isopoda). | the taxonomic genus rickettsiella (gammaproteobacteria; legionellales) comprises intracellular bacteria associated with a wide range of arthropods including insects, arachnids and crustaceans. the present study provides ultrastructural together with genetic evidence for a rickettsiella bacterium in the common rough woodlouse, porcellio scaber (isopoda, porcellionidae), occurring in germany, and shows that this bacterium is very closely related to one of the same genus occurring in california tha ... | 2014 | 24880712 |
| host tissues as microhabitats for wolbachia and quantitative insights into the bacterial community in terrestrial isopods. | animal-bacterial symbioses are highly dynamic in terms of multipartite interactions, both between the host and its symbionts as well as between the different bacteria constituting the symbiotic community. these interactions will be reflected by the titres of the individual bacterial taxa, for example via host regulation of bacterial loads or competition for resources between symbionts. moreover, different host tissues represent heterogeneous microhabitats for bacteria, meaning that host-associat ... | 2014 | 24750488 |
| genome sequence of a crustacean iridovirus, iiv31, isolated from the pill bug, armadillidium vulgare. | members of the family iridoviridae are animal viruses that infect only invertebrates and poikilothermic vertebrates. the invertebrate iridovirus 31 (iiv31) was originally isolated from adult pill bugs, armadillidium vulgare (class crustacea, order isopoda, suborder oniscidea), found in southern california on the campus of the university of california, riverside, usa. iiv31 virions are icosahedral, have a diameter of about 135 nm, and contain a dsdna genome 220.222 kbp in length, with 35.09 mol % ... | 2014 | 24722681 |
| wolbachia infect ovaries in the course of their maturation: last minute passengers and priority travellers? | wolbachia are widespread endosymbiotic bacteria of arthropods and nematodes. studies on such models suggest that wolbachia's remarkable aptitude to infect offspring may rely on a re-infection of ovaries from somatic tissues instead of direct cellular segregation between oogonia and oocytes. in the terrestrial isopod armadillidium vulgare, wolbachia are vertically transmitted to the host offspring, even though ovary cells are cyclically renewed. using fluorescence in situ hybridization (fish), we ... | 2014 | 24722673 |
| phylogenomics of "candidatus hepatoplasma crinochetorum," a lineage of mollicutes associated with noninsect arthropods. | bacterial gut communities of arthropods are highly diverse and tightly related to host feeding habits. however, our understanding of the origin and role of the symbionts is often hindered by the lack of genetic information. "candidatus hepatoplasma crinochetorum" is a mollicutes symbiont found in the midgut glands of terrestrial isopods. the only available nucleotide sequence for this symbiont is a partial 16s rrna gene sequence. here, we present the 657,101 bp assembled genome of candidatus hep ... | 2014 | 24482531 |
| multi-infections of feminizing wolbachia strains in natural populations of the terrestrial isopod armadillidium vulgare. | maternally inherited wolbachia (α-proteobacteria) are widespread parasitic reproductive manipulators. a growing number of studies have described the presence of different wolbachia strains within a same host. to date, no naturally occurring multiple infections have been recorded in terrestrial isopods. this is true for armadillidium vulgare which is known to harbor non simultaneously three wolbachia strains. traditionally, such wolbachia are detected by pcr amplification of the wsp gene and stra ... | 2013 | 24324814 |
| effects of landfill leachate treatment on hepatopancreas of armadillidium vulgare (crustacea, isopoda). | the major environmental impact of landfills is emission of pollutants via the leachate and gas pathways. the hepatopancreas of the terrestrial isopod armadillidium vulgare (isopoda, crustacea, latreille 1804) plays an important role in the bioaccumulation of contaminants, such as heavy metals. to evaluate the effects of landfill leachate treatment, 2 different approaches were applied: 1) the detection of accumulation of trace elements (as, cd, cr, cu, sb, zn, pb, ni, v) in hepatopancreatic cells ... | 2013 | 23929682 |
| the best timing of mate search in armadillidium vulgare (isopoda, oniscidea). | mate choice is mediated by many components with the criteria varying across the animal kingdom. chemical cues used for mate attractiveness can also reflect mate quality. regarding the gregarious species armadillidium vulgare (isopod crustacean), we tested whether individuals can discriminate conspecifics at two different levels (between sex and physiological status) based on olfactory perception. tested conspecifics were individuals of the same or opposite sex, with the females at different moul ... | 2013 | 23469225 |
| species-specific recognition of the carrier insect by dauer larvae of the nematode caenorhabditis japonica. | host recognition is crucial during the phoretic stage of nematodes because it facilitates their association with hosts. however, limited information is available on the direct cues used for host recognition and host specificity in nematodes. caenorhabditis japonica forms an intimate association with the burrower bug parastrachia japonensis. caenorhabditis japonica dauer larvae (dl), the phoretic stage of the nematode, are mainly found on adult p. japonensis females but no other species. to under ... | 2013 | 23077159 |
| ommochrome genesis in an albino strain of a terrestrial isopod. | the contents of tryptophan (trp) metabolites and the activities of the enzymes involved in ommochrome biosynthesis were measured in an albino strain of a terrestrial isopod armadillidium vulgare. there was little difference between the trp content in the albino mutant and that in the wild type, although the contents of 3-hydroxykynurenine (3-oh-kyn), 3-hydroxyanthranilic acid (3-oh-aa) and xanthommatin in the albino were significantly lower than those in the wild type. tryptophan 2,3-dioxygenase ... | 1999 | 10721113 |
| high virulence of wolbachia after host switching: when autophagy hurts. | wolbachia are widespread endosymbionts found in a large variety of arthropods. while these bacteria are generally transmitted vertically and exhibit weak virulence in their native hosts, a growing number of studies suggests that horizontal transfers of wolbachia to new host species also occur frequently in nature. in transfer situations, virulence variations can be predicted since hosts and symbionts are not adapted to each other. here, we describe a situation where a wolbachia strain (wvulc) be ... | 2012 | 22876183 |
| assemblages of terrestrial isopods (isopoda, oniscidea) in a fragmented forest landscape in central europe. | terrestrial isopods were collected in 13 forest fragments differing in area (within the range of 0.1 and 254.5 ha), shape and composition of forest vegetation (thermophilous oak, mesophilous oak-hornbeam, thermophilous oak-hornbeam, acidophilous oak, basiphilous oak, beech oak-hornbeam, moist mixed deciduous forest, plantations of deciduous and coniferous trees), all situated in the český kras protected landscape area, czech republic, central europe. number of sites sampled in each fragment of f ... | 2012 | 22536108 |
| isolation and amino acid sequence of a peptide with vitellogenesis inhibiting activity from the terrestrial isopod armadillidium vulgare (crustacea). | the complete amino acid sequence of a neuropeptide was established using gas-phase microsequencing, mass spectrometry, and reverse transcription-polymerase chain reaction. this peptide, stored in the sinus gland of the terrestrial isopod armadillidium vulgare, inhibited vitellogenin synthesis by the fat tissue and inhibited the onset of secondary vitellogenesis when tested in homologous bioassays. this peptide, named arv-vih, has 83 amino acid residues and a molecular mass of 9485 da. relationsh ... | 1999 | 10480992 |
| widespread atypical mitochondrial dna structure in isopods (crustacea, peracarida) related to a constitutive heteroplasmy in terrestrial species. | metazoan mitochondrial dna (mtdna) is generally composed of circular monomeric molecules. however, a few exceptions do exist and among them two terrestrial isopods armadillidium vulgare and porcellionides pruinosus have an atypical mtdna composed of linear monomers associated with circular "head-to-head" dimers: a very unusual structure for animal mtdna genome. to assess the distribution of this atypical mtdna among isopods, we performed rflp and southern blot analyses on mtdna of 16 terrestrial ... | 2012 | 22376074 |
| multiple paternity in a wild population of armadillidium vulgare: influence of infection with wolbachia? | female multiple mating has been extensively studied to understand how nonobvious benefits, generally thought to be of genetic nature, could overcome heavy costs such as an increased risk of infection during mating. however, the impact of infection itself on multiple mating has rarely been addressed. the interaction between the bacterium wolbachia and its terrestrial crustacean host, armadillidium vulgare, is a relevant model to investigate this question. in this association, wolbachia is able to ... | 2017 | 27905665 |
| egg envelopes of armadillidium vulgare (latreille, 1804) (crustacea, isopoda oniscidea): ultrastructure and lectins binding. | the ultrastructural study carried out on (a) oocytes of armadillidium vulgare during vitellogenesis, (b) mature eggs taken from the ovaries during the parturial moult of the posterior half of the body, and (c) fertilized eggs collected within a few hours of their release into the brood pouch, has clearly demonstrated that before the fertilization the chorion is the only envelope present in the egg of oniscidean isopods. in the mature eggs, the chorion appears as a uniformly electron-dense lamina ... | 2016 | 27324273 |
| sperm storage, sperm translocation and genitalia formation in females of the terrestrial isopod armadillidium vulgare (crustacea, peracarida, isopoda). | we investigated sperm storage, sperm transfer from the oviduct to the seminal receptacle, and formation of the cuticular genitalia in female armadillidium vulgare using light and electron microscopy. apolysis of the genitalia within the oviduct forms a circum-genital lumen. during insemination this space is filled with immobile spermatozoa. sperm transfer into the seminal receptacle takes place before oviposition. within a peculiar proximal neck region of the oviduct spermatozoa are bundled and ... | 2011 | 20659586 |
| precursor structure, distribution and possible functions of pigment-dispersing hormone (pdh) in the terrestrial isopod armadillidium vulgare (latreille). | pigment-dispersing hormone (pdh) is an 18 amino acid neuropeptide that induces pigment migration in decapoda and serves as a circadian neurotransmitter in the locomotor activity rhythm in drosophila. in this study, a cdna encoding pdh was cloned from adult brains of the pill bug, armadillidium vulgare (av). the cdna comprising 529 bp encodes a peptide (avpdh) that consists of a putative 26 amino acid signal peptide, and a 34 amino acid pdh-precursor-related peptide containing an 18 amino acid ma ... | 2010 | 20637211 |
| genetic and biochemical studies on ommochrome genesis in an albino strain of a terrestrial isopod, armadillidium vulgare. | genetic studies and quantitative determination of levels of 3-hydroxykynurenine and kynurenine were performed in an albino strain of a terrestrial isopod armadillidium vulgare. from the results of matings between the albino and the albino, the red, the dark red, or the wild type individuals, the albino a. vulgare seems to be regulated by an autosomal gene(s) recessive to its wild allele. litter mating of f1 progenies obtained by crossing the albino and the red mutant or the albino and the dark r ... | 1997 | 9359622 |
| correct disulfide pairing is required for the biological activity of crustacean androgenic gland hormone (agh): synthetic studies of agh. | androgenic gland hormone (agh) of the woodlouse, armadillidium vulgare, is a heterodimeric glycopeptide. in this study, we synthesized agh with a homogeneous n-linked glycan using the expressed protein ligation method. unexpectedly, disulfide bridge arrangement of a semisynthetic peptide differed from that of a recombinant peptide prepared in a baculovirus expression system, and the semisynthetic peptide showed no biological activity in vivo. to confirm that the loss of biological activity resul ... | 2010 | 20092253 |
| structure and evolution of the atypical mitochondrial genome of armadillidium vulgare (isopoda, crustacea). | the crustacean isopod armadillidium vulgare is characterized by an unusual approximately 42-kb-long mitochondrial genome consisting of two molecules co-occurring in mitochondria: a circular approximately 28-kb dimer formed by two approximately 14-kb monomers fused in opposite polarities and a linear approximately 14-kb monomer. here we determined the nucleotide sequence of the fundamental monomeric unit of a. vulgare mitochondrial genome, to gain new insight into its structure and evolution. our ... | 2007 | 17906827 |
| respiratory physiology of the oniscidea: aerobic capacity and the significance of pleopodal lungs. | the radiation of the terrestrial isopods (sub-order oniscidea) has been accompanied by evolution of pleopodal lungs in the sections tylida and crinocheta. to understand the significance of such lungs for aerobic respiration, comparative studies were conducted using 6 species. ligia occidentalis, lacking lungs, behaved as a metabolic conformer in reduced po(2), and showed decreased v(.-)o(2) in low humidity and following dehydration. in species possessing lungs, metabolism was insensitive to dehy ... | 2006 | 16875858 |
| the mineral phase in the cuticles of two species of crustacea consists of magnesium calcite, amorphous calcium carbonate, and amorphous calcium phosphate. | the cuticules (shells) of the woodlice porcellio scaber and armadillidium vulgare were analysed with respect to their content of inorganic material. it was found that the cuticles consist of crystalline magnesium calcite, amorphous calcium carbonate (acc), and amorphous calcium phosphate (acp), besides small amounts of water and an organic matrix. it is concluded that the cuticle, which constitutes a mineralized protective organ, is chemically adapted to the biological requirements by this combi ... | 2005 | 15877152 |
| isolation and structural determination of seminal vesicle-specific peptides of the terrestrial isopod, armadillidium vulgare. | during the course of purifying the androgenic gland hormone of the terrestrial isopod, armadillidium vulgare, that induces post-embryonic sex differentiation, four structurally related peptides were obtained and their structures determined by a combination of microsequence and mass spectral analyses. these peptides were found to exist speciffically in the seminal vesicle and vas deferens by a western blot analysis, therefore being designated as seminal vesicle-specific peptides (svsps). they had ... | 1995 | 7670185 |