Characterization of cadmium and calcium fluxes along the gut, malpighian tubules, and anal papillae of the dipteran Chironomus riparius

2018 ◽  
Vol 37 (10) ◽  
pp. 2542-2549 ◽  
Author(s):  
Erin M. Leonard ◽  
Ryan Belowitz ◽  
Pieter Agema ◽  
Michael J. O'Donnell
Keyword(s):  
Chironomus Riparius ◽  
Malpighian Tubules ◽  
Calcium Fluxes ◽  
Anal Papillae

Ultrastructural Characterization of Malpighian Tubules of Rhodnius prolixus During the Insect's Feeding Cycle and Under Hyperosmotic Shock

2020 ◽  
Vol 129 (2) ◽  
pp. 189
Author(s):  
Jacenir Reis dos Santos-Mallet ◽  
Simone Patrícia Carneiro Freitas ◽  
Maria Luiza Ribeiro de Oliveira ◽  
Alice Helena Ricardo-Silva ◽  
Aníbal Gil Lopes ◽  
...  
Keyword(s):  
Rhodnius Prolixus ◽  
Malpighian Tubules ◽  
Hyperosmotic Shock ◽  
Ultrastructural Characterization ◽  
Feeding Cycle

Characterization of Hsp70 gene in Chironomus riparius: Expression in response to endocrine disrupting pollutants as a marker of ecotoxicological stress

2011 ◽  
Vol 153 (1) ◽  
pp. 150-158 ◽  
Author(s):  
Mónica Morales ◽  
Rosario Planelló ◽  
Pedro Martínez-Paz ◽  
Oscar Herrero ◽  
Estrella Cortés ◽  
...  
Keyword(s):  
Chironomus Riparius ◽  
Hsp70 Gene ◽  
Endocrine Disrupting

Regulation of rectal secretion in saline-water mosquito larvae living in waters of diverse ionic composition

1977 ◽  
Vol 66 (1) ◽  
pp. 83-96 ◽  
Author(s):  
T. J. Bradley ◽  
J. E. Philips
Keyword(s):  
Chemical Composition ◽  
External Medium ◽  
Saline Water ◽  
Ionic Composition ◽  
Malpighian Tubules ◽  
Fluid Composition ◽  
Mosquito Larvae ◽  
Major Site ◽  
Osmotic Concentration ◽  
Anal Papillae

1. Larvae of the saline-water mosquito Aedes campestris were adapted to three waters, all having an osmotic concentration of 700 mOsm, but differing in ionic rations. The (Na+Mg) SO4 medium was much moretoxic than the NAHCO3 or the NaCl media. 2. Ionic and osmotic concentrations of haemolymph and rectal secretion were measured in larvae adapted to all three media. The ratio of ionic concentrations in the rectal secretion reflected those in the external medium to which the larvae had been adapted, with the exception of SO42-, which was possibly replaced by HCO3-in the secretion. These differences in rectal fluid composition persisted even though all ligated recta were bathed in the same artificial haemolymph. 3. The Malpighian tubules were found to be the major site of SO42- excretion. In media containing high levels of NA+, Mg2+, K+, Cl- and HCO3-, the rectum secreted a hyperosmotic fluid containing these ions at concentrations several times greater than those found in the haemolymph. 4. These data provide the basis for speculation on the functioning of anal papillae in waters of diverse chemical composition.

Characterization of the juvenile hormone epoxide hydrolase (JHEH) and juvenile hormone diol phosphotransferase (JHDPT) fromManduca sexta Malpighian tubules

1995 ◽  
Vol 30 (2-3) ◽  
pp. 255-270 ◽  
Author(s):  
Michael L. Grieneisen ◽  
Travis D. Kieckbusch ◽  
Amy Mok ◽  
Gy�rgy Dorman ◽  
Bachir Latli ◽  
...  
Keyword(s):  
Juvenile Hormone ◽  
Epoxide Hydrolase ◽  
Malpighian Tubules

Drosophila brachyenteron regulates gene activity and morphogenesis in the gut

Development ◽  
1996 ◽  
Vol 122 (12) ◽  
pp. 3707-3718 ◽  
Author(s):  
J.B. Singer ◽  
R. Harbecke ◽  
T. Kusch ◽  
R. Reuter ◽  
J.A. Lengyel
Keyword(s):  
Genetic Locus ◽  
Malpighian Tubules ◽  
Gene Activity ◽  
Phenotypic Characterization ◽  
Gut Development ◽  
Allelic Series ◽  
Genes Encoding

Chromosomal region 68D/E is required for various aspects of Drosophila gut development; within this region maps the Brachyury homolog T-related gene (Trg), DNA of which rescues the hindgut defects of deficiency 68D/E. From a screen of 13,000 mutagenized chromosomes we identified six non-complementing alleles that are lethal over deficiencies of 68D/E and show a hindgut phenotype. These mutations constitute an allelic series and are all rescued to viability by a Trg transgene. We have named the mutant alleles and the genetic locus they define brachyenteron (byn); phenotypic characterization of the strongest alleles allows determination of the role of byn in embryogenesis. byn expression is activated by tailless, but byn does not regulate itself. byn expression in the hindgut and anal pad primordia is required for the regulation of genes encoding transcription factors (even-skipped, engrailed, caudal, AbdominalB and orthopedia) and cell signaling molecules (wingless and decapentaplegic). In byn mutant embryos, the defective program of gene activity in these primordia is followed by apoptosis (initiated by reaper expression and completed by macrophage engulfment), resulting in severely reduced hindgut and anal pads. Although byn is not expressed in the midgut or the Malpighian tubules, it is required for the formation of midgut constrictions and for the elongation of the Malpighian tubules.

Cadmium transport by the gut and Malpighian tubules of Chironomus riparius

2009 ◽  
Vol 92 (3) ◽  
pp. 179-186 ◽  
Author(s):  
Erin M. Leonard ◽  
Laura M. Pierce ◽  
Patricia L. Gillis ◽  
Chris M. Wood ◽  
Michael J. O’Donnell
Keyword(s):  
Chironomus Riparius ◽  
Malpighian Tubules ◽  
Cadmium Transport
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