QUICK SEARCH:   [advanced] Author: Keyword(s):
Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by BERRIDGE, M. J. Search for Related Content PubMed PubMed Citation Articles by BERRIDGE, M. J. Social Bookmarking                         What's this?

Journal of Experimental Biology 44,553-566 (1966)
Published by Company of Biologists 1966

The Physiology of Excretion in the Cotton Stainer, Dysdercus Fasciatus, Signoret : IV. Hormonal Control of Excretion

M. J. BERRIDGE ¹

¹ Department of Zoology, University of Cambridge; Department of Biology, University of Virginia, Charlottesville, Virginia, U.S.A.

1. The preparation of isolated Malpighian tubules is described. The rate of urine flow increases with increasing serum dilution, and vice versa. Urine is almost isotonic with haemolymph over a wide range of osmotic pressure.

2. Serum collected from 3-day-old insects promotes urine formation, whereas that from 6-day-old insects does not.

3. A factor which was extracted from the m.n.c. accelerates the rate of urine flow, from a normal value of 0·87 to 3·1 mm.³ x 10^{- 3}/min. The osmotic pressure of the urine, however, remains unchanged.

4. The hormone concentration of different parts of the nervous system was assayed with these isolated tubules. Most activity occurs in the m.n.c., but some activity is present in extracts from the c.c. and the fused ganglionic mass in the mesothorax.

5. Malpighian tubules isolated from 6-day-old insects remain inactive, but after the addition of hormone they immediately begin to produce urine.

6. These observations have been incorporated into a tentative hypothesis on the control of excretion in Dysdercus.

CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter    What's this?

This article has been cited by other articles:

				H. Li, H. Wang, K. M. Schegg, and D. A. Schooley Metabolism of an insect diuretic hormone by Malpighian tubules studied by liquid chromatography coupled with electrospray ionization mass spectrometry PNAS, December 9, 1997; 94(25): 13463 - 13468. [Abstract] [Full Text] [PDF]

				J. H. SPRING, A. M. MORGAN, and S. R. HAZELTON A Novel Target for Antidiuretic Hormone in Insects Science, August 26, 1988; 241(4869): 1096 - 1098. [Abstract] [PDF]