Changes in the secretory activity of the glandular lobe of the corpus cardiacum of Locusta migratoria induced by flight

1977 ◽  
Vol 180 (2) ◽  
Author(s):  
L.H.P.M. Rademakers ◽  
A.M.Th. Beenakkers
Keyword(s):  
Locusta Migratoria ◽  
Secretory Activity ◽  
Corpus Cardiacum

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.

Secretory Structures associated with the Neurosecretory System of the Immature Scorpion, Heterometrus swammerdami

1961 ◽  
Vol s3-102 (60) ◽  
pp. 475-479
Author(s):  
MOHAMMAD HABIBULLA
Keyword(s):  
Composite Structure ◽  
Secretory Activity ◽  
Neurosecretory System ◽  
Neurosecretory Material ◽  
Corpus Cardiacum ◽  
Secretory Structures ◽  
Moult Stage ◽  
Prothoracic Glands ◽  
Frontal Ganglion ◽  
Rostral Region

Certain previously unknown structures, probably endocrine in nature, are described. The blind ‘end-organ’ which is present and shows signs of activity in the pre-moult stage shows no noticeable sign of activity in the post-moult stage. In certain respects it is comparable to the ‘anterior organ’ of spiders, which has been homologized with the prothoracic glands of insects. In the rostral region of the scorpion, where the rostral nerve ramifies, an accumulation of leucocytes is found; these show signs of secretory activity. Both at the origin of the rostral nerve and also where it ramifies, neurosecretory material is seen. This rostral structure is comparable in certain aspects with the rostral organ of spiders. Leucocytes occur not only in the rostral organ but also in association with the ‘endorgan’. The presence of two ganglionic masses, above and below the stomodaeal commissure, suggests the possibility of the sympathetic (stomatogastric) ganglion of the scorpion being a composite structure consisting of the frontal ganglion, the corpus cardiacum, and possibly the hypocerebral ganglion. A hypocerebral ganglion is absent in the adult.

Peptide profiling of a single Locusta migratoria corpus cardiacum by nano-LC tandem mass spectrometry

Peptides ◽  
2003 ◽  
Vol 24 (10) ◽  
pp. 1475-1485 ◽  
Author(s):  
G. Baggerman ◽  
E. Clynen ◽  
J. Huybrechts ◽  
P. Verleyen ◽  
S. Clerens ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Tandem Mass Spectrometry ◽  
Locusta Migratoria ◽  
Tandem Mass ◽  
Corpus Cardiacum

The Structure of the Corpus Cardiacum of Locusta Migratoria

1954 ◽  
Vol s3-95 (30) ◽  
pp. 245-250
Author(s):  
K. K. NAYAR
Keyword(s):  
Phase Contrast ◽  
Locusta Migratoria ◽  
Phase Contrast Microscopy ◽  
Living Tissue ◽  
Corpus Cardiacum ◽  
Cytoplasmic Inclusions ◽  
Contrast Microscopy

The corpus cardiacum of Locusta consists of a syncytium containing nuclei of two sizes. The most obvious cytoplasmic inclusions are spheroid bodies, mostly about 0.6µ in diameter, which are easily seen in the living tissue, especially by phase-contrast microscopy. They do not appear in routine microscopical preparations, but are blackened by the classical ‘Golgi’ techniques. They give positive reactions for phospholipines. The cytoplasm also contains very numerous minute granules, which appear to be mitochondria.

Studies on the Effects of the Removal of the Frontal Ganglion in Locusta Migratoria L

1967 ◽  
Vol 46 (1) ◽  
pp. 13-25
Author(s):  
KENNETH U. CLARKE ◽  
CEDRIC GILLOTT
Keyword(s):  
Amino Acids ◽  
Protease Activity ◽  
Locusta Migratoria ◽  
The Body ◽  
Gut Contents ◽  
Temporary Increase ◽  
Corpus Cardiacum ◽  
Initial Weight ◽  
Constant Weight ◽  
Frontal Ganglion

1. Studies were made on the third, fourth-, and fifth-instar nymphs of Locusta migratoria L. from which the frontal ganglion had been removed, on controloperated animals, and on starved animals. 2. The effects of this operation on protein metabolism were observed by study of: electrophoresis of haemolymph proteins, chromatography of haemolymph amino acids, production of protease in the midgut, and the incorporation of 14C-glycine into protein by the body cells. 3. The total protein concentration in the haemolymph of operated locusts did not increase with time as did that of the controls, in which the increase was almost entirely due to changes in the second of the three bands which normally separate out. 4. The concentration of the free amino acids in the haemolymph fell to about 70% of that found in the operated controls. In operated locusts the proportions of the amino acids relative to one another changed. 5. The incorporation of 14C-glycine into protein was slower and the equilibrium concentration less in operated as compared with control-operated animals. The time taken to reach equilibrium was the same in both cases. 6. In both operated and control-operated animals the protease activity of the midgut wall was very low; no difference could be detected between them. The protease activity of the mid-gut contents expressed per mid-gut was lower in operated than in control-operated animals. The protease activity expressed per mg. was found to be the same in operated, control-operated and starved animals. 7. The hypothesis that the effects of the removal of the frontal ganglion were mediated through changes in the secretion of hormones from the corpus cardiacum was tested by giving daily injections of freshly prepared corpus cardiacum extract to locusts from which the frontal ganglion had been removed, and observing the growth in weight of these animals. A permanent increase in weight amounting to 100% of their initial weight was found. Animals injected with distilled water showed a temporary increase amounting to 30% of their initial weight. Uninjected animals maintained approximately constant weight.

Sign in / Sign up

Export Citation Format

Share Document