scholarly journals The hormonal control of diuresis in the cabbage white butterfly Pieris brassicae

1976 ◽  
Vol 65 (3) ◽  
pp. 565-575
Author(s):  
S. W. Nicolson
Keyword(s):  
Pieris Brassicae ◽  
Corpus Allatum ◽  
Hormonal Control ◽  
Malpighian Tubules ◽  
Storage Site ◽  
Diuretic Activity ◽  
Corpus Cardiacum ◽  
Diuretic Hormone ◽  
Cabbage White Butterfly ◽  
The Brain

The diuresis which follows the pupal-adult ecdysis of Pieris brassicae is hormonally controlled. Use of the isolated Malpighian tubules as a bioassay shows the presence of substantial diuretic activity in homogenates of the brain and corpus cardiacum-corpus allatum complex. The hormone is probably produced in the brain and released from a storage site in the corpora cardiaca. The tubules of the butterfly are maximally responsive to the diuretic hormone at the time of eclosion.

Hormonal Control of the Malpighian Tubules of the Stick Insect, Carausius Morosus

1970 ◽  
Vol 52 (3) ◽  
pp. 653-665 ◽  
Author(s):  
DIANA E. M. PILCHER
Keyword(s):  
Stick Insect ◽  
Hormonal Control ◽  
The State ◽  
Malpighian Tubules ◽  
Suboesophageal Ganglion ◽  
Carausius Morosus ◽  
Corpora Cardiaca ◽  
Diuretic Hormone ◽  
The Brain

1. Urine secretion by isolated Malpighian tubules of Carausius is accelerated by a diuretic hormone which can be extracted from the brain, corpora cardiaca and suboesophageal ganglion. 2. The level of this hormone in the haemolymph varies according to the state of hydration of the insect. 3. The hormone is inactivated by the tubules, and a mechanism is proposed whereby the tubules might be controlled by the hormone in vivo.

THE EFFECTS OF MANDUCA SEXTA DIURETIC HORMONE ON FLUID TRANSPORT BY THE MALPIGHIAN TUBULES AND CRYPTONEPHRIC COMPLEX OF MANDUCA SEXTA

1993 ◽  
Vol 178 (1) ◽  
pp. 231-243 ◽  
Author(s):  
N. Audsley ◽  
G. M. Coast ◽  
D. A. Schooley
Keyword(s):  
Cyclic Amp ◽  
Manduca Sexta ◽  
Fluid Transport ◽  
Basal Membrane ◽  
Fluid Secretion ◽  
Hormonal Control ◽  
Malpighian Tubules ◽  
Proximal Tubules ◽  
Fluid Absorption ◽  
Diuretic Hormone

1. Manduca sexta diuretic hormone (Mas-DH) stimulates fluid secretion by adult Malpighian tubules of M. sexta, demonstrating its site of diuretic action in M. sexta for the first time. It was not possible to develop a suitable bioassay to measure fluid secretion in larval proximal tubules. 2. Mas-DH has an antidiuretic action on the cryptonephric complex of larval M. sexta because it increases fluid absorption from the rectum. It appears that in this complex Mas-DH is acting on a Na+/K+/2Cl- co-transporter, presumably on the basal membrane of the cryptonephric Malpighian tubules, because Mas-DH-stimulated fluid absorption by the cryptonephric complex is inhibited by bumetanide or the removal of Cl-, Na+ or K+ from the haemolymph side of the tissue. This is the first demonstration of hormonal control of fluid absorption by the cryptonephric complex. 3. Concomitant with the stimulation of fluid transport, Mas-DH increases the amount of cyclic AMP secreted by adult Malpighian tubules and the cryptonephric complex. In addition, Mas-DH promotes cyclic AMP production by the larval proximal tubules.

The Control of Changes in Peripheral Sensilla Associated with Feeding in Locusta Migratoria (L.)

1972 ◽  
Vol 57 (3) ◽  
pp. 755-763
Author(s):  
E. A. BERNAYS ◽  
R. F. CHAPMAN
Keyword(s):  
Normal Level ◽  
Electrical Resistance ◽  
Locusta Migratoria ◽  
Corpus Cardiacum ◽  
Corpora Cardiaca ◽  
Diuretic Hormone ◽  
Stretch Receptors ◽  
The Brain ◽  
Maxillary Palps ◽  
Stimulation Of

1. The electrical resistance across the tips of the maxillary palps is not affected by stimulation of the palps, but increases to the normal level found after feeding as a result of distension of the foregut with agar or injection of corpus cardiacum homogenates into the haemolymph. 2. No increase in resistance occurs if the posterior pharyngeal nerves or the frontal connectives are cut. 3. It is inferred that distension of the foregut stimulates stretch receptors which, acting via the posterior pharyngeal nerves, the frontal connectives and the brain, cause the release of hormone from the storage lobes of the corpora cardiaca. This hormone acts on the terminal sensilla of the palps, causing them to close and so increasing the resistance across the palps. 4. Release of the diuretic hormone is controlled via the same pathway.

scholarly journals Carbachol-Induced Protein Phosphorylation in the Brain-Corpus Cardiacum-Corpus Allatum Complex of the Silkworm, Bombyx mori

1997 ◽  
Vol 32 (4) ◽  
pp. 573-581 ◽  
Author(s):  
Yasuhito SHIRAI ◽  
Yoko SAKAMURA ◽  
Motoyuki SUMIDA ◽  
Yasuo AIZONO
Keyword(s):  
Protein Phosphorylation ◽  
Bombyx Mori ◽  
Corpus Allatum ◽  
Corpus Cardiacum ◽  
The Brain ◽  
Silkworm Bombyx Mori

scholarly journals Identification of Myotropic Neuropeptides from the Brain and Corpus Cardiacum-Corpus Allatum Complex of the Beetle,Zophobas atratus

2010 ◽  
Vol 10 (156) ◽  
pp. 1-19 ◽  
Author(s):  
Pawel Marciniak ◽  
Neil Audsley ◽  
Mariola Kuczer ◽  
Grzegorz Rosinski
Keyword(s):  
Corpus Allatum ◽  
Corpus Cardiacum ◽  
Zophobas Atratus ◽  
The Brain

Morphology of the neuroendocrine systems of two larval blackflies, Prosimulium mixtum/fuscum and Simulium venustum

1976 ◽  
Vol 54 (9) ◽  
pp. 1579-1584 ◽  
Author(s):  
William J. Condon ◽  
Roger Gordon ◽  
Charles H. Bailey
Keyword(s):  
Neurosecretory Cell ◽  
Corpus Allatum ◽  
Neuroendocrine System ◽  
Corpus Cardiacum ◽  
Corpora Cardiaca ◽  
Cell Clusters ◽  
The Brain ◽  
Glandular Portion ◽  
Neuroendocrine Systems

The anatomical relations of the neuroendocrine systems of simuliid larvae Prosimulium mixtum/fuscum and Simulium venustum were examined histologically. The neuroendocrine system in the brain showed morphological similarities to culicids (viz., three pairs of cerebral neurosecretory cell clusters, one pair of nervi corporis cardiaci entering the corpus cardiacum glandular system). The retrocerebral glandular portion of the neuroendocrine system was comprised of a corpus allatum, corpora cardiaca, and surrounding peritracheal gland. The morphology of the blackfly neuroendocrine system is discussed in relation to those of other families of Nematocera and higher Diptera.

Induction of Sulphate Transport and Hormonal Control of Fluid Secretion by Malpighian Tubules of Larvae of the Mosquito Aedes Taeniorhynchus

1978 ◽  
Vol 72 (1) ◽  
pp. 181-202 ◽  
Author(s):  
S.H. P. MADDRELL ◽  
J. E. PHILLIPS
Keyword(s):  
Sea Water ◽  
Fluid Secretion ◽  
Hormonal Control ◽  
Malpighian Tubules ◽  
High Rate ◽  
Sulphate Content ◽  
Thoracic Ganglia ◽  
Sulphate Transport ◽  
Aedes Taeniorhynchus ◽  
The Brain

1. 4th stage larvae of A. taeniorhynchus reared in sulphate-enriched sea water drink the medium at the same rate that they do when reared in sulphate-free sea water. They absorb into the haemolymph most of the water and nearly all of the sulphate from the ingested fluid. 2. Larvae are able to keep the concentration of sulphate in the haemolymph at levels well below that of the medium, even when this contains as much as 89 mM sulphate. 3. The Malpighian tubules of larvae reared in sulphate-containing waters soon develop an ability to transport sulphate. The rate of sulphate transport induced varies directly with the sulphate content of the water in which they are reared. This ability is not retained into the adult stage. 4. The rate of fluid secretion by isolated Malpighian tubules is increased by up to 20 times when they are exposed to saline containing 1.5 mM cyclic AMP or concentrations of 5-hydroxytryptamine higher than 10−6 5. Tubules isolated from unfed insects into stimulant-free saline secrete fluid only slowly, but similarly treated tubules from feeding insects initially secrete fluid very much faster. 6. Extracts of the brain and of the thoracic ganglia stimulate Malpighian tubules to secrete fluid at a high rate. The brain is about four times as rich a source of stimulant as is the chain of thoracic ganglia. Treatment of the surface of the structures in the head with K-rich saline leads to the release of a factor which stimulates fluid secretion by the Malpighian tubules. 7. The results suggest that the Malpighian tubules in larvae of A. taeniorhynchus are under the control of a diuretic hormone which is elaborated in the brain and possibly also in the thoracic ganglia and which reaches high levels in the circulating haemolymph of feeding animals. 8. The rate of sulphate transport by isolated Malpighian tubules is strongly affected by the rate of fluid secretion. This behaviour is compatible with a passive leak of transported sulphate from the lumen back into the haemolymph through the permeable wall of the tubule.

Sign in / Sign up

Export Citation Format

Share Document