Download PDF by Marie Raabe: Insect Neurohormones

Nonfiction 8

By Marie Raabe

ISBN-10: 1468440136

ISBN-13: 9781468440133

ISBN-10: 1468440152

ISBN-13: 9781468440157

The discovery of insect neurohormones dates from the earliest experimental in­ vestigations in insect endocrines, and the problem can't be mentioned with out evoking the names of its pioneers-Kopec, Wigglesworth, Fraenkel. while the experiments tested the life of the 1st recognized neurohormones, the formula of the concept that of neurosecretion was once of basic significance to additional growth, and tribute needs to be paid to Ernst and Berta Scharrer. the hot proliferation of investigations into insect neurohormones has cre­ ated the necessity for an total overview of the information. Our wisdom of the topic is voluminous, and the facts truly demonstrates that neurohormones playa half in such a lot insect regulatory approaches. This booklet analyzes and synthesizes the information, ranging from neurosecretion (i.e., resource websites and unlock modes of neurohormones) and carrying on with throughout the numerous features during which neurohormones were proven to be concerned: endocrine gland task; diapause; copy; visceral muscle functioning; colour switch; habit; water and ion stability; protein, sugar, and lipid metabo­ lism; and tanning and different methods taking place on the cuticle point. In each one bankruptcy, along with the experimental info, technical strategies in addition to contemporary info bearing on purification of the actual neurohor­ mones and their mode of motion are pronounced. a number of exhaustive tables permit the reader to get an outline of the problem whereas the foremost findings of the mo­ ment are awarded within the end of every chapter.

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The relationship between these cells and the perisympathetic organs seems to vary. Sometimes they are located within the perisympathetic organs, sometimes nearby. As in the corpora cardiaca, octopamine has been found in the perisympathetic organs (Evans, 1978, 1980), thus suggesting a possible role of amines in the release of neurosecretory material. 4. Distal Neurohemal Organs We have seen above that the perisympathetic organs may divide, which results in the occurrence of a classical organ located close to the nervous system and in two remote distal organs.

The most thorough investigations have been conducted on dragonflies (Charlet, 1969; Tembhare and Thakare, 1977), stick insects (Raabe, 1965a,b, 1967), cockroaches (de Besse 1965), locusts (Freon, 1964; Delphin, 1965; Chalaye, 1965, 1974a, 1975), the beetle Blaps mucronata (Fletcher, 1969), the moth Galleria mellon ella (Delepine, 1965), and the blood-sucking bug Rhodnius prolixus (Baudry, 1968). The neurosecretory cells of the ventral nerve cord are less numerous and 25 NEUROHORMONE SYNTHESIS, STORAGE, AND RELEASE more widely dispersed than the brain cells, but they belong to many types and form rich and diversified systems.

Iphita limbata Heteroptera Oncopeltus Jasciatus Adelphocoris lineolatus Lethocerus indicum Megoura viciae Steel (1977) Kopf (1957) Homoptera Fraser (1959) Fuller (1960) Credland and Scales (1976) Lucilia caesar Diptera Corethra plumicornis larva Chironomus plumosus larva { I pairt I pairt Area§ 3 pairs* 2 groups§ 1 pairt 1 pairt 2 pairs 2 pairst 1 pair 2-3 pairs 2-3 pairs - 2 - 4 pairs - 2 - 4 pairs - 2 - 4 pairs 1 pair 1-2 pairs pair 2 pairs 3 pairs*1 pair 5-6 cells*- pair Large areast 4 pairs 5 pairs pair pair 1-2 pairs _ 1 - 2 median cells1-2 pairs*------.

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Insect Neurohormones by Marie Raabe

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