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Título: | Juvenile Hormone Titer Versus Juvenile Hormone Synthesis in Female Nymphs and Adults of the German Cockroach, Blattella germanica |
Autor: | Treiblmayr, Karl; Pascual Duran, Nuria CSIC; Piulachs, Maria-Dolors CSIC ORCID ; Keller, Thomas; Bellés, Xavier CSIC ORCID | Palabras clave: | Hemolymph juvenile hormone titer CA corpora allata JH juvenile hormone |
Fecha de publicación: | 27-nov-2006 | Editor: | University of Wisconsin-Milwaukee | Citación: | Journal of Insect Science 6: 43 (2006) | Resumen: | Patterns of juvenile hormone have been intensively studied in the cockroach Blattella germanica under different physiological situations. However, data have been mainly obtained in vitro, and refer to hormone synthesized by isolated corpora allata, whereas information available on hormone concentration in the hemolymph is restricted to adult females. In order to complement our studies in vitro, we have measured juvenile hormone titer in the hemolymph of B. germanica females in four characteristic physiological situations: penultimate and last instar nymphs, adults during the first vitellogenic cycle, and adults transporting egg cases (ootheca). In general, a significant positive correlation between rates of hormone synthesis and concentration in the hemolymph is observed. The main disparities appear in the penultimate day of the period of ootheca transport, where titer is high whereas synthesis is low, and on day 6 of the first vitellogenic cycle, where synthesis increases whereas titer decreases. At these stages, the observed disparities between synthesis and titer might be explained by differential action of degradation enzymes. | Descripción: | 7 pages, 3 figures.-- PMCID: PMC2990300. | Versión del editor: | http://dx.doi.org/10.1673/031.006.4301 | URI: | http://hdl.handle.net/10261/29677 | DOI: | 10.1673/031.006.4301 | E-ISSN: | 1536-2442 |
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