Results 141 to 150 of about 659 (187)
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Proctolin: A possible releasing factor in the corpus cardiacum/corpus allatum of the locust
Peptides, 2006The corpus cardiacum (CC) and corpus allatum (CA) of the locust, Locusta migratoria, contain intense proctolin-like immunoreactivity (PLI) within processes and varicosities. In contrast, in the cockroach, Diploptera punctata, although a similar staining pattern occurs within the CC, PLI appears absent within the CA.
Lisa, Clark +3 more
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Corpus allatum control of ovarian development in Aedes aegypti
Journal of Insect Physiology, 1973Ovarian follicles of Aedes aegypti normally pass through a potential stage of arrest 1 day after adult ecdysis and after blood feeding. Removal of the corpora allata or decapitation within an hour of these events interrupts normal development, and development is restored by reimplantation of active allata or by administration of synthetic analogues of ...
R W, Gwadz, A, Spielman
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Corpus allatum activity and wing determination in Megoura viciae
Nature, 1975ALARY polymorphism in aphids is influenced by several environmental stimuli acting prenatally and/or postnatally1. In Megoura viciae, alatae are determined prenatally by exposing previously isolated apterae to a short crowding stimulus2, and the physiological mechanism controlling this process would be expected also to show an immediate response to the
P M, Leckstein, M, Llewellyn
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Rab proteins in the brain and corpus allatum of Bombyx mori
Histochemistry and Cell Biology, 2016In eukaryotic cells, Rab guanosine triphosphate-ases serve as key regulators of membrane-trafficking events, such as exocytosis and endocytosis. Rab3, Rab6, and Rab27 control the regulatory secretory pathway of neuropeptides and neurotransmitters. The cDNAs of Rab3, Rab6, and Rab27 from B. mori were inserted into a plasmid, transformed into Escherichia
Tomohide, Uno +8 more
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Ultrastructure of the corpus cardiacum and corpus allatum of the house cricket Acheta domesticus
Cell and Tissue Research, 1979The ultrastructure of the corpus cardiacum (CC) and corpus allatum (CA) of the house cricket, Acheta domesticus, is described. Axon profiles within the CC contain neurosecretory granules 160-350 nm in diameter which are indistinguishable from those found in type I neurosecretory cells of the pars intercerebralis and in the nervus corporis cardiaci I ...
J T, Bradley, J S, Edwards
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Functions of the Corpus Allatum of Insects
Nature, 1935IT was suggested recently1 that the active substance (moulting hormone) which initiates cell division in the epidermis of Rhodnius and so induces moulting, and the substance (inhibitory hormone) which restrains metamorphosis until this insect is full-grown, are both secreted by the corpus allatum.
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Control of the medial neurosecretory cells by the corpus allatum in Calliphora erythrocephala
General and Comparative Endocrinology, 1969Abstract The nuclei and nucleoli of the medial neurosecretory cells (MNC) undergo cyclic changes in volume: just after emergence, while feeding on a “maintenance diet” of sugar, and again, while feeding on a “reproductive diet” of meat. Changes in MNC nuclear volume are correlated with changes in the quantity of neurosecretory granules observed in ...
E, Thomsen, A O, Lea
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The hyperglycaemic activity of the corpus allatum in an insect
Journal of Insect Physiology, 1969Abstract Chromatographic and dilution studies indicate that the hyperglycaemic factor present in extracts of the corpora allata is probably identical to that found in the corpora cardiaca but present in lower concentrations. It is suggested that the activity present is due to the occurrence of cardiaca tissue within and around the corpora allata.
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The Corpus Allatum and Oogenesis inRhodnius Prolixus(Stål.)
Journal of Experimental Biology, 1972ABSTRACTIn the ovarioles of both normal and allatectomized females the spaces open between the cells of the follicle layer and vitellogenesis begins as the terminal oocyte grows through the 350–400 μm size range. In both normal and allatectomized ovarioles the growth of the larger oocytes is markedly co-ordinated so that, for example, each ovariole ...
G. E. Pratt, K. G. Davey
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Corpus allatum and ovarian growth in a polymorphic paedogenetic insect
Nature, 1975IN parthenogenetically reproducing Aphis craccivora Koch, ovarian growth is initiated before birth and continues throughout larval life1. Consequently, maintenance of the juvenile form and reproduction occur simultaneously in this insect. The corpus allatum has been shown to be active in both these processes in other insects where ovarian growth does ...
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