| | 1 | Author
| Elisabeth Lehmbergab, Hans-J Ferenzb, ShalomW. Applebauma | Requires cookie* | | | Title
| Maturation and Responsiveness to Extracts of Corpora Allata from Male Locusta migratoria containing Allatotropic Factors  | | | | Abstract
| Corpora allata (CA) from male Locusta migratoria were tested for their ability to synthesize juvenile hormone (JH) and to respond to stimulating brain/corpora cardiaca (CC) extracts under in vitro conditions. We found that a preincubation o f the CA o f both sexes at 4 °C for 24 h lowers their basal rate o f synthesis and retains their responsiveness to allatotropic factors. Male CA can be stimulated by brain/CC extracts as well as female CA. JH biosynthesis stimu lating factors are also present in male brain/CC extracts. Thus such extracts from male locusts can be used for the isolation o f locust allatotropin. Furthermore male locust CA are appro priate for bioassaying such allatotropic factors. | | | |
Reference
| Z. Naturforsch. 47c, 449 (1992); received July 19 1991/March 23 1992 | | | |
Published
| 1992 | | | |
Keywords
| Corpora allata, JH Biosynthesis, Allatotropin, Locusta migratoria | | | |
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| default:Reihe_C/47/ZNC-1992-47c-0449.pdf | | | | Identifier
| ZNC-1992-47c-0449 | | | | Volume
| 47 | |
| 2 | Author
| Heinz Rem, K. Laus-, Peter Sieber | Requires cookie* | | | Title
| Inhibition of Oogenesis and Ovarian Ecdysteroid Synthesis by Azadirachtin in Locusta migratoria migratorioides (R. & F.) | | | | Abstract
| The sterilizing effect of azadirachtin, an insect growth regulator from the neem tree, Azadirachta indica A. Juss, was tested with mature females o f Locusta migratoria. After a single injection of 10 |ig into females between 2 and 13 days after emergence, about 60% died during the following four days and all lost weight in the range of about 50%. If the compound was injected into animals of an age between 2 and 10 days, no maturation o f the terminal oocytes could be observed. Injection at an age between 10 and 13 days after adult emergence resulted in ovaries which contained almost mature oocytes. Most o f the treated locusts had no oviposition and only traces of ecdysteroids were present in their ovaries, as quantified by radioimmunoassay. The inhibition of oogenesis and o f ovarian ecdysteroid synthesis by azadirachtin is discussed on the basis of its interference with the neuroendocrine control of hormone synthesis. | | | |
Reference
| Z. Naturforsch. 36c, 466 (1981); received November 10 1980/February 23 1981 | | | |
Published
| 1981 | | | |
Keywords
| Locusta migratoria, Azadirachta indica, Ecdysteroids, Azadirachtin, Ovary | | | |
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| default:Reihe_C/36/ZNC-1981-36c-0466.pdf | | | | Identifier
| ZNC-1981-36c-0466 | | | | Volume
| 36 | |
| 4 | Author
| Hans-Peter Stupp, MartinG. Peter | Requires cookie* | | | Title
| Juvenile Hormone III as a Natural Ligand for Photoaffinity Labelling of JH-Binding Proteins | | | | Abstract
| Juvenile hormone III, i.e. methyl 10,1 l-epoxy-3,7-dimethyl-2£',6£'-dodecadienoate, was used for photoaffinity labelling of JH-binding proteins. Irradiation of haemolymph from Manduca sexta and Locusta migratoria in the presence of racemic [10-3H]JH-III results in covalent | | | |
Reference
| Z. Naturforsch. 39c, 1145—1149 (1984); received April 26/July 23 1984 | | | |
Published
| 1984 | | | |
Keywords
| Insect Haemolymph, Hormone Binding Proteins, Juvenile Hormone, Photoaffinity Labelling, Manduca sexta, Locusta migratoria | | | |
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| default:Reihe_C/39/ZNC-1984-39c-1145.pdf | | | | Identifier
| ZNC-1984-39c-1145 | | | | Volume
| 39 | |
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