THE ROLE OF THE DEGRADATION SYSTEM OF THE JUVENILE HORMONE IN THE IMAGO STRESS-REACTION AND ADAPTATION OF THE DROSOPHILA POPULATIONS TO THE UNFAVOURABLE MEDIUM CONDITIONS

The two species of Drosophila, D. virilis and D. melanogaster have been investigated. The purpose of the work: the revealation of the role of the system of degradation of the juvenile hormone in the imago stress-reaction and the role of the stress-reaction in the adaptation of the populations to the unfavourable conditions. Characterized in details has been the juvenile hormone degradation system of the D. melanogaster. For the first time, the reaction of the juvenile hormone degradation system of the this species on stressing effect has been studied. It has been established, that the females respond to the stressor action by the decrease of activity of the juvenile hormone-esterase and juvenile hormone-epoxydhydrase. The similar reaction of the males is absent. For the first time, the analysis of the juvenile hormone-esterase (JHE) activity genetic control of the D. melanogaster has been performed. It has been detected, that the activity of the ferment in the norm and with stress is being controlled by the different genes. The gene, controlling the juvenile hormone-esterase activity under the normal conditions, is realized in chromosome 2. The tissue expression of the JHE gene of the D. melanogaster has been studied. For the first time, it has been shown, that the gene is being expressed in the ovuries. For the first time, the polymorphism of the native populations D. melanogaster by the juvenile hormone degradation system has been shown. The hypothesis about the role of the juvenile hormone degradation system in the adaptation of the populations to the unfavourable conditions has been offeredAvailable from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio