Abstract：
:Lepidoptera males bear concomitantly nucleate (eupyrene) and anucleate (apyrene) spermatozoa. Both kinds of spermatozoa reach the spermatheca of inseminated females but only the eupyrene ones fertilize the eggs. The functions of the apyrene spermatozoa are still uncertain. Eupyrene spermatogenesis is regular and highly sensitive to genetic and experimental manipulations while apyrene spermatogenesis is irregular and withstands these manipulations. Both kinds of spermatozoa derive from the same kind of bipotential spermatocytes. The shift of spermatocyte commitment from eupyrene to apyrene spermatogenesis is induced by a haemolymph factor that becomes active just before or after pupation, depending on species. Accordingly, eupyrene spermatogenesis starts during larval instars and stops after pupation while apyrene spermatogenesis begins just before or after pupation, depending on the species, and persists in the imago. The shift is related to shortening of meiotic prophases and blocking synthesis of a meiotic lysine-rich protein fraction in apyrene cells. From spermatogonia proliferation to early spermatocytes, spermatogenesis is a quasi-independent process. Afterwards, it becomes discontinuous and is punctuated by predetermined stations. Progress to a subsequent station is an 'all or none' phenomenon, regulated by cues linked to fluctuations of the main morphogenetic hormones titers. In absence of a particular cue, the cells stop advancing towards the next station and eventually degenerate.
journal_name
J Insect Physioljournal_title
Journal of insect physiologyauthors
Friedländer Mdoi
10.1016/s0022-1910(97)00044-9keywords:
subject
Has Abstractpub_date
1997-11-01 00:00:00pages
1085-1092issue
12eissn
0022-1910issn
1879-1611pii
S0022-1910(97)00044-9journal_volume
43pub_type
杂志文章abstract：:In insects, especially in mosquitoes that are adult blood feeders, midgut remodeling is an important event during metamorphosis. It involves two processes viz., programmed cell death (PCD) of larval cells, and proliferation and differentiation of imaginal cells to form pupal/adult midgut. These processes are regulated...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2006.09.009
更新日期：2007-03-01 00:00:00
abstract：:Honey bees will learn to respond to an odor when their antennae are stimulated with sucrose, even if they are not fed during the conditioning phase. However, if they are not fed, the memory of this association is significantly reduced 24 h after conditioning. These results suggest that stimulation of proboscis with su...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2018.04.014
更新日期：2018-01-01 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：:Sperm cells are costly to produce; diet should therefore affect sperm number and/or viability. In non-social insects and vertebrates, there is compelling evidence that diet influences sperm production. Less is known about this relationship in eusocial hymenopterans (all ants and some bees and wasps), whose mating syst...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2017.05.012
更新日期：2017-07-01 00:00:00
abstract：:RNA interference has been successfully used in adult honeybees, but there are only few reports about abdominal application of dsRNA/siRNA which have reached more distant tissues than the fat body. We studied systemic RNAi in honeybees by injecting fluorescent siRNA of the ubiquitously expressed honeybee homologue of t...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2011.03.013
更新日期：2011-07-01 00:00:00
abstract：:The resistance of a transgenic line of oilseed rape expressing constitutively the cysteine proteinase inhibitor oryzacystatin I (OCI) was assessed against Psylliodes chrysocephala L. (Coleoptera: Chrysomelidae). The levels of OCI expression in the transformed line averaged 0.2% and 0.05% of total soluble protein in le...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/s0022-1910(97)00142-x
更新日期：1998-03-01 00:00:00
abstract：:We investigated the response of Helicoverpa armigera larvae towards ingestion of Cicer arietinum Kunitz proteinase inhibitor (CaKPI), which caused antagonistic effects on developing H. armigera larvae. CaKPI-degrading proteinases were not detectable in either control or sensitized larvae. There were negligible increas...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2005.07.005
更新日期：2005-11-01 00:00:00
abstract：:A new method was developed for artificial insemination of the silkworm. Virgin females artificially inseminated by this method oviposited fertilized eggs at a rate almost similar to that of females mated with males. Using inactive sperm collected from the seminal vesicles, we confirmed the previous finding by Omura, S...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/s0022-1910(98)00148-6
更新日期：1999-05-01 00:00:00
abstract：:Thermal tolerance, supercooling point, water balance and osmoregulatory ability of Pringleophaga marioni Viette (Lepidoptera: Tineidae) are investigated in this study. Field-fresh larvae had a mean CT(Min) (cold stupor) of -0.6 degrees C and a mean CT(Max) (heat coma) of 38.7 degrees C. The mean supercooling point of ...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/s0022-1910(97)00001-2
更新日期：1997-07-01 00:00:00
abstract：:Many studies have established that microRNAs (miRNAs) regulate gene expression in various biological processes in mammals and insects including honey bees. Dancing behavior is a form of communication unique to honey bees. However, it remains unclear which miRNAs regulate the dancing behavior in honey bees, and how. In...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2012.08.008
更新日期：2012-11-01 00:00:00
abstract：:We studied behavioral responses of the cricket, Gryllus bimaculatus, to mechanical stimulation of the hindwing tip using three different kinds of stimuli: touching, bending and pinching. The most characteristic was a sequence of initial jump-like movements and subsequent running steps, that is referred to as escape be...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/s0022-1910(00)00058-5
更新日期：2000-10-01 00:00:00
abstract：:Force feeding of RH-5992 (Tebufenozide), a non-steroidal ecdysone agonist to newly moulted sixth instar larvae of the spruce budworm, Choristoneura fumiferana, (Lepidoptera: Tortricidae) initiates a precocious, incomplete moult. Within 6h post treatment (pt) the larva stops feeding and remains quiescent. Around 12hpt,...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/s0022-1910(96)00062-5
更新日期：1997-02-19 00:00:00
abstract：:Humidity has a large impact on the distribution and abundance of terrestrial invertebrates, but the molecular mechanisms governing drought resistance are not fully understood. Some attention has been given to the role of the heat shock response as a component of desiccation tolerance, but recent focus has been on the ...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2008.11.010
更新日期：2009-03-01 00:00:00
abstract：:We report on the transcriptional patterns of three antibacterial genes, a defensin (MdesDEF-1), a diptericin (MdesDIP-1) and a lysozyme (MdesLYS-1), during development in Hessian fly, Mayetiola destructor. Quantitative analysis by real-time PCR of mRNA levels in different tissues revealed a predominance of the transcr...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2006.08.007
更新日期：2006-11-01 00:00:00
abstract：:Elucidating genes that affect life span or that can be used as biomarkers for ageing has received attention in diverse studies in recent years. Using model organisms and various approaches several genes have been linked to the longevity phenotype. For Drosophila melanogaster those studies have usually focussed on one ...
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：:The last-instar larvae of a drosophilid fly, Chymomyza costata enter diapause in response to the dark-phases longer than 9 h (Yoshida, T., Kimura, M.T., 1995. The photoperiodic clock in Chymomyza costata. Journal of Insect Physiology 41, 217-222). In order to switch the developmental programming of the sensitive larva...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/s0022-1910(99)00195-x
更新日期：2000-06-01 00:00:00
abstract：:An important component of South Africa's malaria elimination agenda is identifying the entomological drivers of residual transmission, especially those that present opportunities for enhanced vector control. Seasonal mosquito density correlates directly with malaria transmission in South Africa. Transmission is highes...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2019.103942
更新日期：2019-10-01 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：:In this study, we investigated activation of the extracellular signal-regulated kinase (ERK) by the prothoracicotropic hormone (PTTH) in prothoracic gland cells of the silkworm, Bombyx mori. The results showed that the PTTH stimulated ERK phosphorylation as this depends on time and dose and ecdysteroidogenic activity....
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2007.03.004
更新日期：2007-06-01 00:00:00
abstract：:Glycogen synthase kinase-3 (GSK-3) is a multifunctional protein kinase that plays important roles in regulating both glycogen synthesis and protein synthesis. In the present study, we investigated GSK-3beta phosphorylation of silkworm eggs by immunoblotting with a conserved phospho-specific antibody to GSK-3beta. Resu...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2009.03.007
更新日期：2009-06-01 00:00:00
abstract：:Although scientists know that overheating kills many organisms, they do not agree on the mechanism. According to one theory, referred to as oxygen- and capacity-limitation of thermal tolerance, overheating occurs when a warming organism's demand for oxygen exceeds its supply, reducing the organism's supply of ATP. Thi...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2020.104157
更新日期：2020-01-01 00:00:00
abstract：:Female mosquitoes require blood meals to complete oogenesis, or egg development. Current methods of maintaining laboratory colonies of mosquitoes generally rely on the use of whole blood to feed females. Blood feeding protocols require special handling techniques, impart numerous potential health hazards, involve sign...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2014.02.012
更新日期：2014-05-01 00:00:00
abstract：:The mechanism controlling the body color of hatchlings was studied for the desert locust, Schistocerca gregaria. A pheromonal factor secreted by gregarious female adults into the foam plugs of egg pods has been suggested to cause darkening in their progeny. We re-examined the role of this maternal factor by washing or...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2006.07.004
更新日期：2006-10-01 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：:Protein phosphatase 2A (PP2A) is a major serine-threonine protein phosphatase which regulates metabolism, transcription, RNA splicing, translation, differentiation, cell cycle, oncogenic transformation and signal transduction. PP2A-Aα, an isoform of PP2A-A, is a structural subunit of the PP2A complex. We identified th...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2013.03.006
更新日期：2013-06-01 00:00:00
abstract：:Elucidating the mechanisms by which honey bees process pollen vs. protein supplements are important in the generation of artificial diets needed to sustain managed honeybees. We measured the effects of diet on protein concentration, hypopharyngeal gland development and virus titers in worker honey bees fed either poll...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2010.03.017
更新日期：2010-09-01 00:00:00
abstract：:Juvenile hormone content of Sesamia nonagrioides larvae reared under different environmental conditions that induce diapause was studied using a bioassay on newly-emerged Tribolium confusum pupae. Two analytical methods were also used to measure JHIII content. Extracts from larvae that developed under different condit...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/s0022-1910(98)00019-5
更新日期：1998-05-01 00:00:00
abstract：:Parental care is a behavioral strategy that contributes to increased fitness of progeny. Among terrestrial arthropods, many isopods provide extensive parental care. Few studies have quantified the underlying cost of parental care in terms of energy. We used the terrestrial woodlouse Porcellio laevis (Latreille) as a s...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2004.10.005
更新日期：2004-12-01 00:00:00
abstract：:Social environments can have a major impact on ageing profiles in many animals. However, such patterns in variation in ageing and their underlying mechanisms are not well understood, particularly because both social contact and isolation can be stressful. Here, we use Drosophila melanogaster fruitflies to examine sex-...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/j.jinsphys.2017.08.008
更新日期：2017-10-01 00:00:00
abstract：:An intraspecific polymorphism in the electrophoretic migration pattern of the yolk proteins in D. hawaiiensis was established and characterized. The polymorphism includes yolk protein migration patterns of two, three, or four bands by polyacrylamide gel electrophoresis. Peptide mapping analysis demonstrates that in th...
journal_title：Journal of insect physiology
pub_type： 杂志文章
doi：10.1016/s0022-1910(97)00071-1
更新日期：1998-02-01 00:00:00
