tobacco hornworm
K+ CHANNEL PERMEATION AND BLOCK IN THE MIDGUT EPITHELIUM OF THE TOBACCO HORNWORM MANDUCA SEXTA
... Tobacco hornworm (Manduca sexta L.) larvae were raised at 26 ˚C (12 h:12 h light:dark) from eggs kindly provided by Professor H. Wieczorek (Munich) and fed a synthetic diet (Carolina Biological Supply Co., ...
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K+/H+ antiport in the tobacco hornworm midgut: the K(+) transporting component of the K+ pump
... The insect V-ATPase, a plasma membrane proton pump energizing secondary active transport: molecular analysis of electrogenic potassium transport in the tobacco hornworm midgut.. Isolatio[r] ...
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The insect V ATPase, a plasma membrane proton pump energizing secondary active transport: molecular analysis of electrogenic potassium transport in the tobacco hornworm midgut
... ATP-dependent proton transport and K + /nH + antiport Having established that the goblet cell apical membrane of tobacco hornworm midgut possesses a V-ATPase, one problem became evident:[r] ...
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Mitochondrial arginine kinase in the midgut of the tobacco hornworm (Manduca sexta)
... maintaining a low [ATP]/[ADP] ratio in the vicinity of the adenine nucleotide translocase. Doumen and Ellington (1990b) have argued that functional coupling of AK and the adenine nucleotide translocase is not an absolute ...
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A chymotrypsin like serine protease interacts with the chitin synthase from the midgut of the tobacco hornworm
... (Cohen and Casida, 1980; Mayer et al., 1980; Ward et al., 1991). Chitin synthesis is also stimulated in the midgut of the tobacco hornworm upon trypsin treatment. However, trypsin does not directly act on ...
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Calcium activated potassium channel of the tobacco hornworm, Manduca sexta: molecular characterization and expression analysis
... the tobacco hornworm, Manduca sexta, provides the opportunity to analyze the effects of changing ion channel gene expression and channel density in vivo at the level of identified neurons or muscles whose ...
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Inhibition of midgut ion transport by allatotropin (Mas AT) and Manduca FLRFamides in the tobacco hornworm Manduca sexta
... the gut innervations of the enteric nervous system (for a review, see Sehnal and Zitnan, 1996). Among those neuropeptides, allatotropin (Mas-AT) immunoreactivity and mRNA have been identified in the nervous tissue during ...
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AN INVESTIGATION OF THE MIDGUT K+ PUMP OF THE TOBACCO HORNWORM (MANDUCA SEXTA) USING SPECIFIC INHIBITORS AND AMPHOTERICIN B
... Key words: K+ secretion, short-circuit current, V-ATPase, nitrate, bafilomycin A1, trimethyltin chloride, ionophore, tobacco hornworm, Manduca sexta.... According to the present model, K[r] ...
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Changes in midgut active ion transport and metabolism during larval larval molting in the tobacco hornworm (Manduca sexta)
... Ion transport and metabolism in the posterior midgut before, during and after the molt to the fifth instar of the tobacco hornworm Manduca sexta were investigated. In situ measurements reveal that the ...
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Correlation between changes in host behaviour and octopamine levels in the tobacco hornworm Manduca sexta parasitized by the gregarious braconid parasitoid wasp Cotesia congregata
... CORRELATION BETWEEN CHANGES IN HOST BEHAVIOUR AND OCTOPAMINE LEVELS IN THE TOBACCO HORNWORM MANDUCA SEXTA PARASITIZED BY THE GREGARIOUS BRACONID PARASITOID WASP COTESIA CONGREGATA SHELLE[r] ...
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Ion Transport Across the Midgut of the Tobacco Hornworm (Manduca Sexta)
... Changes in short-circuit current and potential difference PD with time for the three sections of the tobacco hornworm midgut: • anterior section, • middle section, A posterior section...[r] ...
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Hormonally mediated reprogramming of muscles and motoneurones during the larval pupal transformation of the tobacco hornworm, Manduca sexta
... The role of the commitment pulse for larval-pupal reprogramming of muscles and motoneurones To examine the role of the commitment pulse of ecdysteroids on the developmental fates of the [r] ...
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Novel dual innervation of a larval proleg muscle by two similar motoneurons in the tobacco hornworm Manduca sexta
... For the subset of experiments in which APRs were impaled and their soma location determined, the amplitude and time-to-peak of EJPs produced by anterior APRs N=12 fibers in 11 muscles an[r] ...
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Bathing Solution Tonicity and Potassium Transport by the Midgut of the Tobacco Hornworm Manduca Sexta
... shows the dry weight/wet weight ratio and potassium/tissue water ratio of midgut strips equilibrated in solutions containing 32 m-equiv K+/1 and either 166 rnM sucrose, 83 mM sucrose, or[r] ...
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Dynamic properties of a locomotory muscle of the tobacco hornworm Manduca sexta during strain cycling and simulated natural crawling
... During horizontal crawling, the length of VIL does not exceed resting values Figs·11, 12, with the consequence that strain cycling occurs entirely within the ascending limb of its length[r] ...
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Duration of Pupal Diapause in the Tobacco Hornworm is Determined by Number of Short Days Received by the Larva
... Hornworms transferred from long- to short-day conditions at later stages of larval development enter diapause at a lower rate, but the resulting diapause is of greater duration.. The num[r] ...
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The release of the prothoracicotropic hormone in the tobacco hornworm, Manduca sexta, is controlled intrinsically by juvenile hormone
... To determine if this were the case, or if JH were having an effect upstream by curtailing ecdysone synthesis, haemolymph ecdysteroid titres in developing and in ZR512-treated larvae were[r] ...
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Metabolic Stimulation of Transepithelial Potential Difference Across the Mtdgut of the Tobacco Hornworm (Manduca Sexta)
... sexta midgut maintained high rates of short-circuit current and sustained a high PD when the tissue was bathed with a saline containing citrate and haemolymph levels of inorganic ions.. [r] ...
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Cytoplasmic pH and Goblet Cavity pH in the Posterior Midgut of the Tobacco Hornworm Manduca Sexta
... Following penetration of the basal membrane, penetration of a goblet cavity was indicated by a sharp deflection of at least 20 mV positive to the hemolymphaL side reference electrode Mof[r] ...
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Physiology of Pupal Ecdysis in the Tobacco Hornworm, Manduca Sexta: I Evidence for Control by Eclosion Hormone
... Time of initiation of ecdysis by AS stage animals after injection with A muscle extract; B various dilutions of a pharate adult CC-CA extract; C 01 CC-CA equivalents of purified eclosion[r] ...
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