Abstract：
:At 25 degrees C and under a long-day photoperiod, all 5th instar Psacothea hilaris larvae pupate at the next molt. Under a short-day photoperiod, in contrast, they undergo one or two additional larval molts and enter diapause; the 7th instar larvae enter diapause without further molt. The changes in hemolymph juvenile hormone (JH III) titers, JH esterase activity, and ecdysteroid titers in pupation-destined, pre-diapause, and diapause-destined larvae were examined. JH titers of the 5th instar pupation-destined larvae decreased continuously from 1.3 ng/ml and became virtually undetectable on day 13, when JH esterase activity peaked. Ecdysteroids exhibited a small peak on day 8, 1 day before gut purge, and a large peak on day 11, 2 days before the larvae became pre-pupae. The two ecdysteroid peaks are suggested to be associated with pupal commitment and pupation, respectively. JH titers of the 5th instar pre-diapause larvae were maintained at approximately 1.5 ng/ml for 5 days and then increased to form a peak (3.3 ng/ml) on day 11. JH esterase activity remained at a low level throughout. Ecdysteroid levels exhibited a large peak of 40 ng/ml on day 18, coincident with the larval molt to the 6th instar. JH titers of the 7th instar diapause-destined larvae peaked at 1.9 ng/ml on day 3, and a level of approximately 1.1 ng/ml was maintained even 30-60 days into the instar, when they were in diapause. Ecdysteroid titers remained approximately 0.02 ng/ml. Diapause induction in this species was suggested to be a consequence of high JH and low ecdysteroid titers.
journal_name
J Insect Physioljournal_title
Journal of insect physiologyauthors
Munyiri FN,Ishikawa Ydoi
10.1016/j.jinsphys.2004.09.009keywords:
subject
Has Abstractpub_date
2004-11-01 00:00:00pages
1075-81issue
11eissn
0022-1910issn
1879-1611pii
S0022-1910(04)00156-8journal_volume
50pub_type
杂志文章abstract：:The flightless bug Pyrrhocoris apterus (L.) is polymorphic for both wing length and flight muscle development. The developed flight muscles of macropterous adults of both sexes first enlarge their volume during the first 5 days after adult emergence, but are then histolyzed in all males and females older than 10 and 1...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2005.10.009
更新日期：2006-03-01 00:00:00
abstract：:RNA interference (RNAi) is a powerful tool for artificially manipulating gene expression in diverse organisms. In the honey bee, Apis mellifera, both long double stranded RNA (dsRNA) and small interference RNA (siRNA) have been successfully used to reduce targeted gene expression and induce specific phenotypes. Howeve...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2018.10.005
更新日期：2018-01-01 00:00:00
abstract：:Nestmate recognition in ants is based on perceived differences in a multi-component blend of hydrocarbons that are present on the insect cuticle. Although supplementation experiments have shown that some classes of hydrocarbons, such as methyl branched alkanes and alkenes, have a salient role in nestmate recognition, ...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2011.10.010
更新日期：2012-01-01 00:00:00
abstract：:Electrophysiological studies on female An. gambiae s.s. mosquitoes revealed a receptor neuron within a subpopulation of the antennal grooved-peg sensilla sensitive to the odour of incubated sweat, but not responding to fresh sweat. This receptor neuron was sensitive to ammonia as well, a sweat-borne component which at...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/s0022-1910(00)00136-0
更新日期：2001-04-01 00:00:00
abstract：:The effect of ozone on the respiration of three species of adult stored-product Coleoptera was tested in an air-tight flask. Sitophilus oryzae (L.), Rhyzopertha dominica (F.) and Tribolium castaneum (Herbst) adults were exposed to atmosphere containing 0.1, 0.2 or 0.4microg/ml initial ozone at 23-25 degrees C and 50% ...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2009.05.014
更新日期：2009-10-01 00:00:00
abstract：:Overwintering freeze-tolerant larvae of Chilo suppressalis can survive at -25 degrees C, but non-diapausing larvae cannot. We reported earlier that to prevent intracellular freezing, which causes death in overwintering larvae of the Saigoku ecotype distributed in southwestern Japan, water leaves and glycerol enters fa...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2007.04.005
更新日期：2007-07-01 00:00:00
abstract：:Oocyte counts, used as a measure of egg load, were compared among three different age groups (15, 30 and 45 days) of two polyphagous species of tephritid fruit flies, Anastrepha ludens and Anastrepha obliqua, which were exposed to varying conditions of diet (sucrose vs sucrose and protein), availability of oviposition...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/s0022-1910(01)00072-5
更新日期：2001-09-01 00:00:00
abstract：:Pheromonal control by the honey bee queen is achieved through the use of secretions from diverse glandular sources, but the use of pheromones from a variety of glandular sources by reproductively dominant workers, has not previously been explored. Using the social parasite, Apis mellifera capensis clonal worker we stu...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2017.09.001
更新日期：2017-10-01 00:00:00
abstract：:During the last decade, populations of flightless Mormon crickets Anabrus simplex (Orthoptera: Tettigoniidae) increased suddenly over vast areas of the Western United States, suggesting that climate is an important factor driving outbreaks. Moreover summer temperatures are predicted to increase and precipitation is ex...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2014.05.005
更新日期：2014-06-01 00:00:00
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journal_title：Journal of insect physiology
pub_type： 杂志文章,评审
doi：10.1016/j.jinsphys.2010.02.014
更新日期：2010-10-01 00:00:00
abstract：:Aedes aegypti mosquitoes use pharate 1st instar quiescence to cope with fluctuations in water availability hosting a fully developed 1st instar larvae within the chorion. The duration of this quiescence has been shown to affect larval fitness. This study sought to determine if an extended egg quiescence can elicit a p...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2012.12.007
更新日期：2013-03-01 00:00:00
abstract：:For tsetse (Glossina spp.), the vectors of human and animal trypanosomiases, the physiological mechanisms linking variation in population dynamics with changing weather conditions have not been well established. Here, we investigate high- and low-temperature tolerance in terms of activity limits and survival in a natu...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2007.08.007
更新日期：2008-01-01 00:00:00
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journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2013.01.005
更新日期：2013-03-01 00:00:00
abstract：:Growth-blocking peptide (GBP) has been purified for the first time from the haemolymph of the host armyworm Pseudaletia separata whose growth is inhibited and shows developmental arrest in the last larval instar stage when parasitized by the parasitoid wasp Cotesia kariyai. GBP naturally occurs in the haemolymph of le...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/s0022-1910(98)00017-1
更新日期：1998-09-01 00:00:00
abstract：:Lepidopteran males produce eupyrene (nucleate) and apyrene (anucleate) spermatozoa, but in the female only eupyrene spermatozoa leave the spermatheca and fertilize the eggs. Both kinds of spermatozoa lack intrinsic motility in the male genital duct. They become motile in the spermatophore, in a process involving prote...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/s0022-1910(00)00109-8
更新日期：2001-03-01 00:00:00
abstract：:Studies were undertaken to investigate vitellogenesis and its regulation in female adults of the fall armyworm, Spodoptera frugiperda. A single female-specific protein, likely to be the S. frugiperda vitellogenin (Vg), appeared approximately 5 h after adult eclosion in the hemolymph of virgin females. The concentratio...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/s0022-1910(99)00207-3
更新日期：2000-06-01 00:00:00
abstract：:Dippu-allatostatins (ASTs) have pleiotropic effects in Locusta migratoria. Dippu-ASTs act as releasing factors for adipokinetic hormone I (AKH I) from the corpus cardiacum (CC) and also alter juvenile hormone (JH) biosynthesis and release from the corpus allatum (CA). Dippu-AST-like immunoreactivity is found within la...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2008.03.007
更新日期：2008-06-01 00:00:00
abstract：:Ecdysteroids and juvenile hormones (JHs) regulate many physiological events throughout the insect life cycle, including molting, metamorphosis, ecdysis, diapause, reproduction, and behavior. Fluctuation of whitefly ecdysteroid levels and the identity of the whitefly molting hormone (20-hydroxyecdysone) have only been ...
journal_title：Journal of insect physiology
pub_type： 杂志文章,评审
doi：10.1016/j.jinsphys.2006.11.006
更新日期：2007-03-01 00:00:00
abstract：:While defending lek-territories, male Anastrepha suspensa (Loew) produce chemical, acoustic and visual courtship signals. In the laboratory and under semi-natural conditions, topical application of the juvenile hormone analog methoprene doubles pheromone production and subsequently doubles sexual success. However, sex...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2010.05.008
更新日期：2010-11-01 00:00:00
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journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2007.02.006
更新日期：2007-06-01 00:00:00
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journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2019.103983
更新日期：2020-01-01 00:00:00
abstract：:Drosophila suzukii is an invasive pest that prefers to lay eggs in ripening fruits, whereas most closely related Drosophila species exclusively use rotten fruit as oviposition site. This behaviour is allowed by an enlarged and serrated ovipositor that can pierce intact fruit skin, and by multiple contact sensory syste...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2020.104088
更新日期：2020-01-01 00:00:00
abstract：:In abdominal muscles 202 and 203 of the cricket, Gryllus bimaculatus, large and small excitatory junctional potentials (l- and s-EJPs) with similar durations can be recorded from the same muscle fibers. At the normal extracellular calcium ion concentration ([Ca(2+)](o)) of 5mM, the amplitudes of l-EJPs in both muscles...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/s0022-1910(96)00087-x
更新日期：1997-02-21 00:00:00
abstract：:Proteases are predominant venom components of the ectoparasitoid Nasonia vitripennis. Two protease families, serine proteases and metalloproteases were examined for their possible cytotoxic functions in the Spodoptera frugiperda (Sf21) cell line using protease inhibitors that inactivate one or both protease families. ...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2013.05.004
更新日期：2013-08-01 00:00:00
abstract：:Identification of chitin in sensory hairs of olfactory sensilla of silkmoths was performed using two independent methods. Firstly, ultrathin sections were labelled with gold-conjugated wheat germ agglutinin and showed positive labelling in the cuticule of sensilla as well as in the antennal cuticle. Secondly, isolated...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/s0022-1910(99)00066-9
更新日期：1999-08-01 00:00:00
abstract：:Studies of the genetic mechanisms underlying metabolic storage have focused on a few model organisms. Although very fruitful, these studies have not allowed for the examination of mechanisms across a phylogenetic spectrum. The exploration of natural patterns of metabolic pool size variation across species will help us...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2009.08.008
更新日期：2009-12-01 00:00:00
abstract：:Certain male fruit flies from the genera Bactrocera and Zeugodacus (Diptera: Tephritidae) actively forage for floral semiochemicals produced by some endemic Bulbophyllum orchids found in tropical and subtropical forests. These floral semiochemicals are largely classified as either phenylbutanoids (e.g., raspberry keto...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2019.103949
更新日期：2019-01-01 00:00:00
abstract：:Small heat shock proteins (sHSPs) usually act as molecular chaperones to prevent proteins from being denatured in extreme conditions. We first report the sHSP21 gene, named as Ap-sHSP21, in the Chinese oak silkworm Antheraea pernyi (Lepidoptera: Saturniidae). The full-length cDNA of Ap-sHSP21 is 976 bp, including a 5'...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2013.06.001
更新日期：2013-08-01 00:00:00
abstract：:Phosphorylation of the translational repressor 4E-binding protein (4E-BP) plays a critical role in regulating the overall translation levels in cells. In the present study, we investigated 4E-BP phosphorylation of Bombyx mori eggs by an immunoblot analysis of a conserved phospho-specific antibody to 4E-BP and demonstr...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2011.04.014
更新日期：2011-07-01 00:00:00
abstract：:We have examined the relative sensitivity of Aedes albopictus C7-10 mosquito cells to irradiation with ultraviolet light from a germicidal lamp. On the basis of plating efficiency, C7-10 cells were approximately two times more resistant to UV light than human 293 leukemia cells. Recovery after UV irradiation was accom...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/s0022-1910(01)00156-1
更新日期：2002-01-01 00:00:00
