Publications
| Title | Abstract | Year(sorted ascending) Filter | PMID Filter |
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| importance of juvenile hormone signaling arises with competence of insect larvae to metamorphose. | juvenile hormone (jh) postpones metamorphosis of insect larvae until they have attained an appropriate stage and size. then, during the final larval instar, a drop in jh secretion permits a metamorphic molt that transforms larvae to adults either directly (hemimetaboly) or via a pupal stage (holometaboly). in both scenarios, jh precludes metamorphosis by activating the kr-h1 gene through a jh receptor, methoprene-tolerant (met). removal of met, kr-h1, or jh itself triggers deleterious precocious ... | 2014 | 24662045 |
| capillary electrophoresis of pterin derivatives responsible for the warning coloration of heteroptera. | a new capillary electrophoretic (ce) method has been developed for analysis of 10 selected derivatives of pterin that can occur in the integument (cuticle) of true bugs (insecta: hemiptera: heteroptera), specifically l-sepiapterin, 7,8-dihydroxanthopterin, 6-biopterin, d-neopterin, pterin, isoxanthopterin, leucopterin, xanthopterin, erythropterin and pterin-6-carboxylic acid. pterin derivatives are responsible for the characteristic warning coloration of some heteroptera and other insects, signa ... | 2014 | 24602308 |
| cost effective, robust, and reliable coupled separation techniques for the identification and quantification of phospholipids in complex biological matrices: application to insects. | the quantification of phospholipid classes and the determination of their molecular structures are crucial in physiological and medical studies. this paper's target analytes are cell membrane phospholipids, which play an important role in the seasonal acclimation processes of poikilothermic organisms. we introduce a set of simple and cost-effective analytical methods that enable efficient characterization and quantification of particular phospholipid classes and the identification and relative d ... | 2014 | 24799084 |
| juvenile hormone signaling during reproduction and development of the linden bug, pyrrhocoris apterus. | juvenile hormone (jh), a sesquiterpenoid produced by the insect corpus allatum gland (ca), prevents metamorphosis in larvae and stimulates vitellogenesis in adult females. whether the same jh signaling pathway regulates both processes is presently unknown. here, we employ the robust jh response during reproduction and development of the linden bug, pyrrhocoris apterus, to compare the function of key jh-signaling genes encoding the jh receptor, methoprene-tolerant (met), its binding partner taima ... | 2014 | 24361539 |
| role of adipokinetic hormone in stimulation of salivary gland activities: the fire bug pyrrhocoris apterus l. (heteroptera) as a model species. | the effect of adipokinetic hormone (pyrap-akh) in stimulating the function of insect salivary glands (sgs) in extra-oral digestive processes was studied in the firebug, pyrrhocoris apterus l. (heteroptera). the analyses were performed on samples of sgs and extracts of linden seeds, a natural source of the bug's food. the sgs from 3-day old p. apterus females (when the food ingestion culminates), primarily contained polygalacturonase (pg) enzyme activity, whereas the level of lipase, peptidase, a ... | 2014 | 24269343 |
| brain norepinephrine identified by mass spectrometry is associated with reproductive status of females of the linden bug pyrrhocoris apterus. | several biogenic amines, including controversial presence of norepinephrine (ne), were identified by the high performance liquid chromatography equipped with electrospray ionisation mass spectrometry in brain complexes of adult females of pyrrhocoris apterus. quantitative analysis was performed by the high performance liquid chromatography coupled to electrochemical detector. levels of ne, dopamine (da), octopamine (oa) and 5-hydroxytryptamine (5-ht) in brain complexes were measured in reproduct ... | 2014 | 24239678 |
| [homoxenous trypanosomatids from true bugs pyrrhocoris apterus (l.) in the north of the pskov region]. | in the north of the pskov region (58 degrees 35' n, 28 degrees 55' e) the appearance of a single colony of true bugs pyrrhocoris apterus has been recorded. dissection of 95 individuals from this colony revealed 100% prevalence of infection with homoxenous trypanosomatids. in 3% of the cases intestinal infection was accompanied by hyperinvasion into the salivary glands and hemolyph of the hosts. analysis of trypanosomatid morphotypes demonstrated mixed infections in all studied p. apterus individ ... | 2015 | 25936172 |
| why is the number of days required for induction of adult diapause in the linden bug pyrrhocoris apterus fewer in the larval than in the adult stage? | adult females of pyrrhocoris apterus, programmed for diapause by short-day (sd) photoperiod and those programmed for reproduction by long-day (ld) retain photoperiodic information in continuous darkness (dd) until death. however, if the interruption of sd by dd is made in the course of diapause programming in adults, then the incidence of diapause depends on the number of sd cycles received before dd, with no evidence that the photoperiodic clock is free-running at dd to complete diapause induct ... | 2015 | 25891916 |
| molecular characterization, tissue distribution, and ultrastructural localization of adipokinetic hormones in the cns of the firebug pyrrhocoris apterus (heteroptera, insecta). | adipokinetic hormones (akhs) are a group of insect metabolic neurohormones, synthesized and released from an endocrine retrocerebral gland, the corpus cardiacum (cc). small amounts of akh have also been identified in the brain, although their role in this organ is not clear. to address this gap in the knowledge about insect brain biology, we studied the nucleotide sequence, tissue distribution, and subcellular localization of akhs in the brain and cc of the firebug pyrrhocoris apterus. this inse ... | 2015 | 25449136 |
| reactions of green lizards (lacerta viridis) to major repellent compounds secreted by graphosoma lineatum (heteroptera: pentatomidae). | the chemical defence of heteroptera is primarily based on repellent secretions which signal the potential toxicity of the bug to its predators. we tested the aversive reactions of green lizards (lacerta viridis) towards the major compounds of the defensive secretion of graphosoma lineatum, specifically: (i) a mixture of three aldehydes: (e)-hex-2-enal, (e)-oct-2-enal, (e)-dec-2-enal; (ii) a mixture of these three aldehydes and tridecane; (iii) oxoaldehyde: (e)-4-oxohex-2-enal; (iv) secretion ext ... | 2015 | 25869384 |
| photoperiod regulates growth of male accessory glands through juvenile hormone signaling in the linden bug, pyrrhocoris apterus. | adult reproductive diapause is characterized by lower behavioral activity, ceased reproduction and absence of juvenile hormone (jh). the role of jh receptor methoprene-tolerant (met) in female reproduction is well established; however, its function in male reproductive development and behavior is unclear. in the bean bug, riptortus pedestris, circadian genes are essential for mediating photoperiodically-dependent growth of the male accessory glands (mags). the present study explores the role of ... | 2016 | 26826599 |
| personality and ectoparasitic mites (hemipteroseius adleri) in firebugs (pyrrhocoris apterus). | individuals of the same species often consistently differ in their behaviour across time and context. these stable differences are usually termed 'animal personality'. parasitism is known to significantly influence the evolution of animal personality at least in part because more explorative individuals may meet parasites more frequently than less explorative ones. previously, we have demonstrated that consistent individual differences (i.e. boldness, activity, exploration) can be measured in fi ... | 2016 | 26569455 |
| comparative analysis of volatile defensive secretions of three species of pyrrhocoridae (insecta: heteroptera) by gas chromatography-mass spectrometric method. | the true bugs (hemiptera: heteroptera) have evolved a system of well-developed scent glands that produce diverse and frequently strongly odorous compounds that act mainly as chemical protection against predators. a new method of non-lethal sampling with subsequent separation using gas chromatography with mass spectrometric detection was proposed for analysis of these volatile defensive secretions. separation was performed on rtx-200 column containing fluorinated polysiloxane stationary phase. va ... | 2016 | 27997627 |
| hypermetabolic conversion of plant oil into water: endothermic biochemical process stimulated by juvenile hormone in the european firebug, pyrrhocoris apterus l. | the physiological and biochemical mechanisms that enable insects to feed on dry food to secure enough water for larval growth were investigated. the study was carried out with a plethora of physiological methods, ranging from the simple volumetric determination of o2 consumption and water intake to more advanced methods such as scanning microrespirography and thermovision imaging of insect's body temperature. the experiments were done on the european firebug, pyrrhocoris apterus, which feeds exc ... | 2016 | 27790049 |
| unexpected geographic variability of the free running period in the linden bug pyrrhocoris apterus. | circadian clocks keep organisms in synchrony with external day-night cycles. the free running period (frp) of the clock, however, is usually only close to-not exactly-24 h. here, we explored the geographical variation in the frp of the linden bug, pyrrhocoris apterus, in 59 field-lines originating from a wide variety of localities representing geographically different environments. we have identified a remarkable range in the frps between field-lines, with the fastest clock at ~21 h and the slow ... | 2016 | 27708112 |
| characterization of the adipokinetic hormone receptor of the anautogenous flesh fly, sarcophaga crassipalpis. | adipokinetic hormone (akh) is an insect neuropeptide mainly involved in fat body energy mobilization. in flies (phormia regina, sarcophaga crassipalpis), bugs (pyrrhocoris apterus) and cockroaches (periplaneta americana) akh was also demonstrated to be involved in the regulation of digestion. this makes akh an important peptide for anautogenous female flies that need to feed on a supplementary protein meal to initiate vitellogenesis, the large scale synthesis of yolk proteins and their uptake by ... | 2016 | 27063262 |
| through experience to boldness? deactivation of neophobia towards novel and aposematic prey in three european species of tits (paridae). | european tits (paridae) exhibit species-specific levels of initial wariness towards aposematic prey. this wariness may be caused by neophobia, dietary conservatism or innate bias against particular prey traits. we assessed the contribution of these three mechanisms to the behaviour of juvenile tits towards novel palatable prey and novel aposematic prey. we compared levels of initial wariness in great tits (parus major), blue tits (cyanistes caeruleus) and coal tits (periparus ater), and tested h ... | 2016 | 27474371 |
| folk knowledge of invertebrates in central europe - folk taxonomy, nomenclature, medicinal and other uses, folklore, and nature conservation. | there is scarce information about european folk knowledge of wild invertebrate fauna. we have documented such folk knowledge in three regions, in romania, slovakia and croatia. we provide a list of folk taxa, and discuss folk biological classification and nomenclature, salient features, uses, related proverbs and sayings, and conservation. | 2016 | 27729074 |
| [mating behavior following termination of imaginal diapause and its hormonal control in the bug, pyrrhocoris apterus l. (pyrrhocoridae, heteroptera)]. | 2016 | 5737689 | |
| pyrrhocoris apterus (l.) chronome's response to lighting may reveal changes in rhythms that switch developmental pathways. | 2017 | 8131674 | |
| the ability of lizards to identify an artificial batesian mimic. | birds are usually considered the main predators shaping the evolution of aposematic signals and mimicry. nevertheless, some lizards also represent predominately visually oriented predators, so they may also play an important role in the evolution of aposematism. despite this fact, experimental evidence regarding the responses of lizards to aposematic prey is very poor compared to such evidence in birds. lizards possess very similar sensory and cognitive abilities to those of birds and their resp ... | 2017 | 28716358 |
| beneficial effect of adipokinetic hormone on neuromuscular paralysis in insect body elicited by braconid wasp venom. | the effect of habrobracon hebetor venom and the role of the adipokinetic hormone (akh) in poisoned adult females of the firebug pyrrhocoris apterus were studied 24 and 48h after treatments. venom application elicited total neuromuscular paralysis in firebugs, but the co-application of venom and pyrap-akh significantly reduced paralysis (up to 3.2 times) compared to the application of venom only. although the mechanisms of their action are unknown, both agents might affect neuromuscular junctions ... | 2017 | 28257925 |
| adipokinetic hormone activities in insect body infected by entomopathogenic nematode. | the role of adipokinetic hormone (akh) in the firebug pyrrhocoris apterus adults infected by the entomopathogenic nematode (epn) steinernema carpocapsae was examined in this study. it was found that co-application of epn and akh enhanced firebug mortality about 2.5 times within 24h (from 20 to 51% in epn vs. epn+akh treatments), and resulted in metabolism intensification, as carbon dioxide production in firebugs increased about 2.1 and 1.6times compared to control- and epn-treated insects, respe ... | 2017 | 28254268 |
| species specificity of aldehyde and fatty acid profiles of four family group representatives within the insect infraorder pentatomomorpha (hemiptera: heteroptera). | reactive α,β-unsaturated aldehydes, including 4-oxoalk-2-enals, are known to be present in volatile secretions of numerous heteropteran insect species. because the aldehydes are likely to originate from metabolism of fatty acids (fas), the present study aimed to examine and compare the aldehyde and fa profiles of four model heteropteran species. the model species consisted of adult family group representatives within the infraorder pentatomomorpha (hemiptera: heteroptera): seed bug (lygaeus eque ... | 2017 | 28027605 |
| life cycle of blastocrithidia papi sp. n. (kinetoplastea, trypanosomatidae) in pyrrhocoris apterus (hemiptera, pyrrhocoridae). | blastocrithidia papi sp. n. is a cyst-forming trypanosomatid parasitizing firebugs (pyrrhocoris apterus). it is a member of the blastocrithidia clade and a very close relative of b. largi, to which it is almost identical through its ssu rrna gene sequence. however, considering the sl rna gene these two species represent quite distinct, not even related typing units. morphological analysis of the new species revealed peculiar or even unique features, which may be useful for future taxonomic revis ... | 2017 | 28073072 |
| the effect of social learning on avoidance of aposematic prey in juvenile great tits (parus major). | social learning plays an important role in acquiring new foraging skills and food preferences in many bird species but its potential role in learning to avoid aposematic prey has never been studied. we tested the effect of social learning on the acquisition of avoidance of aposematic insect prey (firebug pyrrhocoris apterus; heteroptera) in juvenile, hand-reared great tits (parus major). behaviour towards aposematic prey was compared between two groups of birds: (1) the observers that were, prio ... | 2017 | 28639012 |
| decrease in methoprene tolerant and taiman expression reduces juvenile hormone effects and enhances the levels of juvenile hormone circulating in males of the linden bug pyrrhocoris apterus. | juvenile hormone (jh) produced by the corpus allatum (ca) stimulates vitellogenesis and reduces the synthesis of hexamerin proteins in adult females of pyrrhocoris apterus. at present it is unknown whether the signaling pathway involving the jh receptor gene methoprene tolerant (met) and its binding partner taiman (tai), regulates the synthesis of accessory gland proteins (acps) and hexamerin proteins or effects male survival. knockdown of genes by injecting met dsrna or tai dsrna, reduced the a ... | 2017 | 27570150 |
| insect cold tolerance and repair of chill-injury at fluctuating thermal regimes: role of 70 kda heat shock protein expression. | expression of heat shock proteins has been proposed as an underlying mechanism of increased cold tolerance in insects exposed to fluctuating thermal regimes (ftrs) in comparison to constant low temperatures (clts). we found that the levels of pahsp70 mrna increase by up to 3 orders in the linden bugs, pyrrhocoris apterus exposed to ftr -5 degree c (22h) and 25 degree c (2h). the 2h-long warm pulses, however, were not sufficient for accumulation of pahsp70 protein and thus no significant differen ... | 2017 | 19946654 |