Development of imaginal competence to adipokinetic hormone in Locusta: Lipid and carbohydrate levels, and glycogen phosphorylase activity in azadirachtin-induced over-aged nymphs

• Published in: Comparative biochemistry and physiology. B, Comparative biochemistry Vol. 94; no. 2; pp. 293 - 298
• Main Authors: Pener, M.P., Van den Broek, A.Th.M., Van Marrewijk, W.J.A., Van Doorn, J.M., Van der Horst, D.J., Beenakkers, A.M.Th
• Format: Journal Article
• Language: English
• Published: New York, NY Elsevier Inc 1989; Elsevier Science
• Subjects: Acrididae; Biochemistry. Physiology. Immunology; Biological and medical sciences; Fundamental and applied biological sciences. Psychology; Insecta; Invertebrates; Locusta migratoria; Orthoptera; Physiology. Development; Terpenoid; Insecta; Orthoptera; Hemolymph; Lipids; Locusta migratoria; Injection; Juvenile hormone analogue; Fatty acids; Acrididae; Larva; Arthropoda; Glycogen phosphorylase; Adult animal; Development; Acridoidea; Carbohydrate; Invertebrata; Adipokinetic hormone
• ISSN: 0305-0491
• DOI: 10.1016/0305-0491(89)90347-7

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.