Development of imaginal competence to adipokinetic hormone in Locusta: Lipid and carbohydrate levels,and glycogen phosphorylase activity in azadirachtin-induced over-aged nymphs |
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| Institution: | 1. Department of Zoology, The Hebrew University of Jerusalem, 91904 Jerusalem, Israel (Tel. 02 585 952);3. Department of Experimental Zoology, University of Utrecht, The Netherlands;1. Department of Biological Sciences, Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University (UNESP), São José do Rio Preto, São Paulo, Brazil;2. Department of Structural and Functional Biology, Institute of Biology, State University of Campinas (UNICAMP), Campinas, São Paulo, Brazil;3. Department of Histology, Embryology and Cell Biology, Laboratory of Microscopy Applied to Reproduction, Institute of Biological Sciences, Federal University of Goiás, Goiânia, Goiás, Brazil;1. Department of Biology, Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University (Unesp), Rua Cristóvão Colombo, 2265, Jardim Nazareth, 15054-000 São José do Rio Preto, São Paulo, Brazil;2. Department of Histology, Embryology and Cell Biology, Institute of Biological Sciences, Federal University of Goiás (UFG), Avenida Esperança, s/n, Câmpus Samambaia, 74690-900 Goiânia, Goiás, Brazil;1. Department of Biological Sciences, Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University (Unesp), Rua Cristóvão Colombo, 2265, Jardim Nazareth, 15054-000 São José do Rio Preto, São Paulo, Brazil;2. Department of Structural and Functional Biology, Institute of Biology, State University of Campinas (UNICAMP), Bertrand Russell, s/n, 13083-865 Campinas, São Paulo, Brazil;3. Department of Histology, Embryology and Cell Biology, Institute of Biological Sciences, Federal University of Goiás (UFG), Avenida Esperança, s/n, Câmpus Samambaia, 74690-900 Goiânia, Goiás, Brazil |
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| Abstract: | - 1.1. Adipokinetic responses to injection of synthetic adipokinetic hormone I (sAKH) and relevant physiological parameters were studied in azadirachtin-induced 31 to 34-day-old Vth-instar over-aged male nymphs of Locusta migratoria which did not undergo the metamorphic moult to adult.
- 2.2. The resting lipid and carbohydrate levels in the haemolymph and sAKH-induced activation of fat body glycogen phosporylase did not differ markedly between over-aged nymphs, normal nymphs and normal adults.
- 3.3. Total fat body glycogen phosphorylase activity and the effect of sAKH on haemolymph carbohydrate level in over-aged nymphs were similar to those in normal adults and differed from those in normal nymphs.
- 4.4. sAKH-induced elevation of haemolymph lipid level in the over-aged nymphs was higher than in normal nymphs but lower than in normal adults; thus, the over-agad nymphs attained only a partial adult competence in this respect.
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