Abstract:
:Intracellular activities of K+, H+, Mg2+, Ca2+, and Cl-, measured with ion selective microelectrodes in the oocyte and the nurse cells in ovarian follicles of Hyalophora cecropia, indicated that a Ca2+ current is a key component of the electrical potential that is maintained across the intercellular bridges connecting these two cells. In vitellogenic follicles, Ca2+ activity averaged 650 nM in the oocyte and 190 nM in the nurse cells, whereas activities of the other ions studied differed between these cells by no more than 6%. Incubation in 200 microM ammonium vanadate caused a reversal of electrical potential from 8.3 mV, nurse cell negative, to 3.0 mV, oocyte negative, and at the same time the Ca2+ gradient was reversed: activities rose to an average 3.0 microM in the nurse cells and 1.6 microM in the oocyte, whereas transbridge ratios of the other cations remained at 0-3%. In immature follicles that had not yet initiated their transbridge potentials, Ca2+ activities averaged approximately 2 microM in both oocyte and nurse cells. The results suggest that vitellogenic follicles possess a vanadate-sensitive Ca2+ extrusion mechanism that is more powerful in the nurse cells than in the oocyte.
journal_name
Arch Insect Biochem Physioljournal_title
Archives of insect biochemistry and physiologyauthors
Woodruff RI,Telfer WHdoi
10.1002/arch.940250103subject
Has Abstractpub_date
1994-01-01 00:00:00pages
9-20issue
1eissn
0739-4462issn
1520-6327journal_volume
25pub_type
杂志文章abstract::A gene encoding heat shock transcription factor (HSF) was cloned and sequenced from cultured cells of the cabbage armyworm, Mamestra brassicae. The cDNA potentially encoded a 699-aa protein, with a calculated molecular weight of 77.8 kDa. Deduced amino acid identities to HSFs from Aedes aegypti and Drosophila melanoga...
journal_title:Archives of insect biochemistry and physiology
pub_type: 杂志文章
doi:10.1002/arch.20339
更新日期:2010-01-01 00:00:00
abstract::Coexistence or displacement of parasitoids in hosts during intrinsic competitive interactions between different parasitoid species (multiparasitism) may depend on their life history traits and behavior. Intense competition for possession of hosts may lead to the elimination of the inferior competitor through physical ...
journal_title:Archives of insect biochemistry and physiology
pub_type: 杂志文章
doi:10.1002/arch.21321
更新日期:2016-06-01 00:00:00
abstract::The hemolymph of each noctuid species successfully parasitized by Chelonus near curvimaculatus possessed a parasitism-specific protein (PSP) previously identified in host T. ni (Insect Biochem. 19:445;21:845). Expression of PSP occurred in a stage-specific manner in the stadium during which the host undergoes precocio...
journal_title:Archives of insect biochemistry and physiology
pub_type: 杂志文章
doi:10.1002/arch.940240305
更新日期:1993-01-01 00:00:00
abstract::The gene encoding the Spodoptera frugiperda allatostatin type-A peptide family (Y/FXFGL-amides) was isolated from S. frugiperda brain cDNA. The gene encodes a precursor of 231 amino acids containing nine (or ten) Y/FXFGL-a peptides that are tandemly arranged in three blocks. The comparison of the Spofr-AST A precursor...
journal_title:Archives of insect biochemistry and physiology
pub_type: 杂志文章
doi:10.1002/arch.20003
更新日期:2004-07-01 00:00:00
abstract::To study dietary pH effects on Lymantria dispar asiatica larvae and provide a theoretical basis for its control in different forests, phosphate buffers (PBs) of pH 6, 7, and 8 were used to prepare experimental diets. The diet prepared with pH 6 PB was named as DPB6, with pH 8 PB as DPB8, and with pH 7 PB as DPB7 (cont...
journal_title:Archives of insect biochemistry and physiology
pub_type: 杂志文章
doi:10.1002/arch.21654
更新日期:2020-04-01 00:00:00
abstract::The green rice leafhopper, Nephotettix cincticeps, is a major rice pest in Southeast Asia and Southern China. Novel control strategies must be explored to control the rice pest. Behavior or fitness regulation of insect by modulating the Troponin C (TnC) may be a novel strategy in the comprehensive management of the in...
journal_title:Archives of insect biochemistry and physiology
pub_type: 杂志文章
doi:10.1002/arch.21438
更新日期:2018-02-01 00:00:00
abstract::The recombinant lambda clone 4-2 containing the genomic region of the Drosophila hormone receptor 38 (DHR 38) gene, homologous to mammalian neuronal growth factor I-B (NGFI-B), was isolated by radioactive labelled oligonucleotide hybridization. The nucleotide sequence of the genomic clone revealed three exons that enc...
journal_title:Archives of insect biochemistry and physiology
pub_type: 杂志文章
doi:10.1002/(SICI)1520-6327(1998)38:4<185::AID-ARCH4>3
更新日期:1998-01-01 00:00:00
abstract::The biological activity of venom from Pimpla turionellae L. (Hymenoptera: Ichneumonidae) was examined in vivo toward larvae and pupae of Galleriae mellonella L. (Lepidoptera: Pyralidae), and in vitro toward bacterial and fungal cultures, as well as cultured insect cells. Pupae of G. mellonella were far more susceptibl...
journal_title:Archives of insect biochemistry and physiology
pub_type: 杂志文章
doi:10.1002/arch.20100
更新日期:2006-02-01 00:00:00
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journal_title:Archives of insect biochemistry and physiology
pub_type: 杂志文章
doi:10.1002/arch.20255
更新日期:2008-06-01 00:00:00
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journal_title:Archives of insect biochemistry and physiology
pub_type: 杂志文章
doi:10.1002/arch.21635
更新日期:2020-02-01 00:00:00
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journal_title:Archives of insect biochemistry and physiology
pub_type: 杂志文章
doi:10.1002/(SICI)1520-6327(200003)43:3<125::AID-ARCH4
更新日期:2000-03-01 00:00:00
abstract::Salivary enzyme, glucose oxidase (GOX) from the caterpillar Helicoverpa zea, catalyzes the conversion of glucose to gluconic acid and hydrogen peroxide. Because hydrogen peroxide has well-known antimicrobial properties, we examined whether caterpillar labial saliva could reduce the infectivity of bacterial pathogens. ...
journal_title:Archives of insect biochemistry and physiology
pub_type: 杂志文章
doi:10.1002/arch.20031
更新日期:2005-02-01 00:00:00
abstract::Enzymes associated with glycogen metabolism and glycerol synthesis in larvae of the Shonai ecotype of the rice stem borer, Chilo suppressalis, were investigated over the winter in 2000-2001. Glycerol content was scarcely detected in September and October, rapidly increased in November and December, peaked in January, ...
journal_title:Archives of insect biochemistry and physiology
pub_type: 杂志文章
doi:10.1002/arch.10024
更新日期:2002-06-01 00:00:00
abstract::The prothoracic glands (PGs) taken from the last instar of the common armyworm, Pseudaletia separata, were cultured in various media for the purpose of finding a suitable medium for relatively long-term culture of PGs. Among the tested culture media, MGM-450 medium without serum was the best to maintain PG cells viabl...
journal_title:Archives of insect biochemistry and physiology
pub_type: 杂志文章
doi:10.1002/(SICI)1520-6327(1998)38:3<147::AID-ARCH5>3
更新日期:1998-01-01 00:00:00
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journal_title:Archives of insect biochemistry and physiology
pub_type: 杂志文章,评审
doi:10.1002/(SICI)1520-6327(1996)32:3/4<271::AID-ARCH2
更新日期:1996-01-01 00:00:00
abstract::In the hawkmoth Manduca sexta high density lipophorin from adult insects (HDLp-A) delivers lipids to developing oocytes. During this lipid delivery HDLp-A is taken up by the oocyte and converted to a very high density lipophorin (VHDLp), which is stored in protein storage granules (yolk bodies). A membrane-free lysate...
journal_title:Archives of insect biochemistry and physiology
pub_type: 杂志文章
doi:10.1002/arch.940200102
更新日期:1992-01-01 00:00:00
abstract::The larvae and adults of Aedes aegypti were tested for the potential to develop resistance to the synthetic pyrethroid, deltamethrin, alone or a combination of deltamethrin with the synergist, piperonyl butoxide (PBO). Although continuous larval selection for 40 generations resulted in 703-fold resistance, the resista...
journal_title:Archives of insect biochemistry and physiology
pub_type: 杂志文章
doi:10.1002/arch.10021
更新日期:2002-05-01 00:00:00
abstract::Purified P-glycoprotein ATPase from Helicoverpa armigera (Ha-Pgp), reconstituted in proteoliposomes composed of phospholipids and cholesterol, shows higher ATPase activity in the presence of cholesterol than in its absence. The Ha-Pgp ATPase activity was increased 30-40% with cholesterol. The KM for ATP was found to b...
journal_title:Archives of insect biochemistry and physiology
pub_type: 杂志文章
doi:10.1002/arch.21004
更新日期:2012-01-01 00:00:00
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journal_title:Archives of insect biochemistry and physiology
pub_type: 杂志文章
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abstract::The relatively little-investigated entomopathogen Conidiobolus coronatus secretes several proteinases into culture broth. Using a combination of ion-exchange and size-exclusion chromatography, we purified to homogeneity a serine proteinase of Mr 30,000-32,000, as ascertained by SDS-PAGE. The purified enzyme showed sub...
journal_title:Archives of insect biochemistry and physiology
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更新日期:2006-08-01 00:00:00
abstract::Lysibia nana is a solitary, secondary idiobiont hyperparasitoid that attacks newly cocooned pre-pupae and pupae of several closely related gregarious endoparasitoids in the genus Cotesia, including C. glomerata. Prior to oviposition, the female wasp injects paralysing venom into the host, thus preventing further devel...
journal_title:Archives of insect biochemistry and physiology
pub_type: 杂志文章
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更新日期:2006-03-01 00:00:00
abstract::This study was undertaken to reveal the quantitative distribution of the insect neuropeptide periviscerokinin-1 (Pea-PVK-1) in the central nervous system of Periplaneta americana and to demonstrate that neurons stained in a previous immunohistochemical study contain authentic Pea-PVK-1. For this, we combined ELISA, HP...
journal_title:Archives of insect biochemistry and physiology
pub_type: 杂志文章
doi:10.1002/(SICI)1520-6327(1999)40:4<203::AID-ARCH5>3
更新日期:1999-01-01 00:00:00
abstract::The effects of tebufenozide and methoxyfenozide on vitellogenin (Vg) synthesis/release in the fat body, translocation in hemolymph, uptake by the ovary, and the expression of the ecdysone receptor (EcR) and its heterodimer partner, ultraspiracle protein (USP) in fat body, were investigated in Cydia pomonella. The resu...
journal_title:Archives of insect biochemistry and physiology
pub_type: 杂志文章
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更新日期:2003-03-01 00:00:00
abstract::Bostrichiformia is the less known major series of Coleoptera regarding digestive physiology. The midgut of Dermestes maculatus has a cylindrical ventriculus with anterior caeca. There is no cell differentiation along the ventriculus, except for the predominance of cells undergoing apocrine secretion in the anterior re...
journal_title:Archives of insect biochemistry and physiology
pub_type: 杂志文章
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更新日期:2007-01-01 00:00:00
abstract::RNA interference (RNAi) has become an integral part of mainstream research due to its versatility and ease of use. However, the potential nontarget effects associated with double-stranded RNAs (dsRNA) are poorly understood. To explore this, we used dsRNAs targeting the inhibitor of apoptosis (iap) gene from nine insec...
journal_title:Archives of insect biochemistry and physiology
pub_type: 杂志文章
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更新日期:2020-08-01 00:00:00
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journal_title:Archives of insect biochemistry and physiology
pub_type: 杂志文章
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更新日期:2015-11-01 00:00:00
abstract::Earlier work had shown that JH acts on the membrane of the follicle cell of Locusta migratoria, bringing about a rapid reduction in volume which can be detected in vitro by measuring the increase in optical path difference using quantitative interference microscopy. The juvenoid fenoxycarb, a phenoxyphenyl derivative,...
journal_title:Archives of insect biochemistry and physiology
pub_type: 杂志文章
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更新日期:1996-01-01 00:00:00
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journal_title:Archives of insect biochemistry and physiology
pub_type: 杂志文章
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更新日期:2011-04-01 00:00:00
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journal_title:Archives of insect biochemistry and physiology
pub_type: 杂志文章
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更新日期:2001-04-01 00:00:00