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  • 1
    Electronic Resource
    Electronic Resource
    Regulation of juvenile hormone titer in African locust (1985)
    Springer
    Cellular and molecular life sciences 41 (1985), S. 1165-1167 
    Details
    ISSN: 1420-9071
    Keywords: Juvenile hormone ; biosynthesis ; catabolism ; tissue binding ; titer ; disconnected copora allata, locust
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In the African locust, the titer of C-16 JH in hemolymph (determined by GC-MS), reflects the rate of hormone biosynthesis (determined by RCA) in normal adult females. Severance of the nervi corporis allati-I (NCA-I) results in a low C-16 JH biosynthesis without affecting physiological events dependent on JH. In NCA-I-transectioned animals, JH titer is higher than in control locusts. JH catabolism does not seem to be involved in this high titer of hormone associated with a very low rate of JH production. In sham-operated females, the bulk of injected [3H]C-16 JH quickly disappeared from the hemolymph but JH was retained in the bloodless body. After severance of the NCA-I, the remaining radiolabeled JH in the hemolymph increased. These results suggest the role of tissue JH-binding or of JH excretion in regulating its level in the locust.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01951710
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  • 2
    Electronic Resource
    Electronic Resource
    Changes in binding of JH-III in hemolymph of adult femaleLocusta migratoria (1987)
    Springer
    Cellular and molecular life sciences 43 (1987), S. 312-314 
    Details
    ISSN: 1420-9071
    Keywords: locust ; corpora allata ; JHBP ; hemolymph protein content ; hemolymph volume
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Hemolymph from adult femaleLocusta migratoria migratorioides was analyzed for binding of juvenile hormone III (JH-III) after allatectomy and transection of thenervus corporis allati 1 (NCA-I). These operations did not affect the apparent dissociation constant of the binding (Kd=3.3 10−8 M). The concentration of binding sites exhibited fluctuations in relation to age and type of operation: an increased concentration of binding sites in females with disconnected corpora allata and a decreased concentration in allatectomized females. The changes in concentration of binding sites was not due to differences in water content or hemolymph volume in operated animals. The hemolymph protein concentration was reduced after NCA-I transection and even more after allatectomy. However, variations in protein concentration did not correlate with changes in concentration of JH-III binding sites. The changes in binding site concentration were related to changes in JH-titer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01945564
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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