Showing papers in "Journal of Insect Physiology in 2009"

TL;DR: The expression studies clearly demonstrate that insect VgRs are ovary-bound receptors of the LDLR family as compared to LpRs, which are transcribed in a wide range of tissues including ovary, fat body, midgut, brain, testis, Malpighian tubules, and muscles.

TL;DR: The results revealed that temperature strongly affected resistance, while UV-B did not, and the prevalence of dual symbiosis involving PAXS and H. defensa in local aphid populations suggests its importance in protecting aphid immunity to parasitism under abiotic stress.

TL;DR: This study studied the effect of siRNA on larval development by selective targeting of the acetylcholinesterase (AChE) gene of Helicoverpa armigera and demonstrated that siRNA can be readily taken up by insect larvae with their diet.

TL;DR: The hypothesis that UV light irradiation increases the level of oxidative stress in H. armigera adults is confirmed, and exposure to UV light for 30 min resulted in increased total antioxidant capacity, protein carbonyl content and activities of SOD, CAT, POX and GST.

TL;DR: It is demonstrated that in the honeybee (Apis mellifera) secretions of the male accessory glands, the major contributors towards seminal fluid, enhance sperm survival, and that the protein fraction of themale accessory gland secretion is indeed important for achieving the maximal effect on sperm survival.

TL;DR: Correlation of amylase and proteinase activities of H. armigera with the protein and carbohydrate content of various diets suggested that H.Armigera regulates the levels of these digestive enzymes in response to macromolecular composition of the diet.

TL;DR: Results suggest that, in addition to a heat shock response, these HSPs may be involved in the development of L. sativae, and that different shsp members may be responsible for cold stresses of different intensity.

TL;DR: The increase in the survival rate of the pre-heat-shocked animals may be explained by higher expression of antimicrobial peptides and higher antifungal and lysozyme activities in their hemolymph in comparison to non- Heat-Shocked animals.

TL;DR: The results show an interesting co-evolutionary phenomenon in which the termite's response to either M. anisopliae or B. bassiana is directly related to potential harm these fungi can inflict on the insect and that the virulent strains are more likely to be recognized from some distance and avoided.

TL;DR: The research conclusively demonstrates that AC signal processing can be designed to duplicate the level of detail and fidelity of aphid waveforms previously provided solely by the DC monitor, including all R- and emf-component waveforms.

TL;DR: It is suggested that heritable cues of workers are the dominant factor influencing nestmate discrimination in these carpenter ants and highlight the importance of colony kin structure for the evolution of eusociality.

TL;DR: The gut bacteria inhibited by tetracycline does not seem to play a crucial role in the survival and development of the velvetbean caterpillar, but may be important in the adaptation of this pest species to hosts rich in protease inhibitors, such as soybean.

TL;DR: This is the first description of individual bark beetle ORNs dedicated to NHV perception, demonstrating that a large proportion of the olfactory system is devoted to signals from plants that the insect avoids.

TL;DR: The results suggest that the course of diapause breakage and post-diapause development may be evolutionarily conserved in higher flies with pupal diAPause, and the biphasic trajectory is distinct from a more continuous trajectory observed during direct development.

TL;DR: Using imaging polarimetry in the red, green and blue parts of the spectrum, in multiple-choice field experiments the threshold p* of ventral polarization sensitivity in mayflies, dragonflies and tabanid flies was measured, the positive polarotaxis of which has been shown earlier.

TL;DR: It appears that hydrolyzable tannins act as "quantitative defenses" in the sense that high levels appear to be necessary to increase levels of semiquinone radicals in the midguts of caterpillars, and tannin consumption was associated with increased metabolic costs.

TL;DR: Findings indicated that age- and morph-dependent decreases in Buchnera density coincided with activation of the host lysosomal system and the increased degradation of BuchnerA.

TL;DR: The analysis revealed that lipid sparing processes during a minimal 7-week long diapause may enhance egg production, and that 38% of the initial (14)C-labled lipid that was synthesized during the adult pre-diapause phase was still present following the first gonotrophic cycle.

TL;DR: Artificial selection for chill coma resistance altered basal patterns of gene expression, but it was failed to link these changes to plastic changes in expression under cold stress or to previously identified candidate genes for components of cold resistance.

TL;DR: A study aimed at ascertaining the possible interactive effects that male and female size and diet, and female access to a host could have on mating latency, probability, and duration and female refractory period using two tropical fruit fly species with contrasting life histories is reported on.

TL;DR: Whatever the observed impairment of xylem feeding is due to a neurotoxic or an antifeedant effect, these results have important implications for commercial crop protection as the behaviour-modifying effects of the sublethal dose of thiamethoxam may change the efficacy of this pesticide throughout the growing season.

TL;DR: Diapausing females may overcome the deleterious effects of UV-B during winter in the absence of leaves by emigrating to UV-free environments and by accumulating carotenoids, a scavenger for UV-induced reactive oxygen species; this may explain the low mortality of diapausing Female.

TL;DR: In the adzuki bean beetle, Callosobruchus chinensis, negative relationships between ambient temperature and mating duration, sperm transfer and sperm transfer duration are found, and female remating frequency at lower temperature was lower than at other temperatures.

TL;DR: Pupal mortality varied according to larval host plants and time: pupae reached their highest mortality in March and showed host plant differences in January, which corresponded closely to changes in over-wintering characteristics.

TL;DR: The ability of sterile males to inhibit receptivity of both wild and laboratory reared females on the day of first mating was significantly improved when they were fed a nutrient rich diet, and the Sterile Insect Technique may be improved by releasing well nourished, older sterile males.

TL;DR: Seasonal changes in the frequency of body color morphs in this tropical species supports melanism-desiccation hypothesis and body color polymorphism seems to be maintained through humidity changes as opposed to thermal melanism.

TL;DR: This study investigates life stage differences in the acclimation and hardening responses of the survival of a standard heat shock and standard low temperature shock, and the crystallization temperature of adults and larvae of the sub-Antarctic kelp fly, Paractora dreuxi, and demonstrates the complexities of thermal tolerance responses in P. d reuxi.

TL;DR: The results suggest considerable changes in the energy metabolic profile of the spermatheca tissue, of the sperm or of both during sperm storage.

TL;DR: Findings suggest aggregation by bed bugs is a result of arrestment mediated by direct, close-range contact between sensilla on the pedicel and stained disks.

TL;DR: The Hsp70-thermotolerance relationship in one of the major fruit fly pests, Ceratitis capitata (medfly), is described and a close link between Hsp 70 expression and inducible thermotolerance is suggested.