Haemolymph juvenile hormone III esterase activity during adult life of female and male crickets,Gryllus bimaculatus de Geer (Ensifera,Gryllidae) |
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| Affiliation: | 1. Allgemeine Zoologie (Biologie I), Universität Ulm, 89069 Ulm, Germany;1. Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX 77843, USA;2. Department of Entomology, Texas A&M University, College Station, TX 77843, USA;3. Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA;1. Civil and Architectural Engineering, University of Wyoming, Laramie, Wyoming, 82071, United States;2. Electrical and Computer Engineering, University of Wyoming, Laramie, Wyoming, 82071, United States;3. Iowa Energy Center, Ames, IA 50010, United States;1. Research Institute for Sustainable Humanosphere (RISH), Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan;2. Research Center for Applied Zoology, National Research and Innovation Agency (BRIN), Jl. Raya Bogor Km 46, Cibinong, Bogor, 16911, Indonesia;1. Department of Instrument Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;2. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China;3. School of Materials Science and Engineering, Changzhou University, Changzhou 213164, China;4. School of Materials Science and Engineering, Nanjing University of Science and Technology, 210094 Nanjing, China;1. Department of Zoology, University of Cambridge, Downing Street, Cambridge CB2 3EJ, UK;1. International Centre for Ecohydraulics Research (ICER), University of Southampton, Boldrewood Innovation Campus, Southampton, SO16 7QF, UK;2. Institute of Sound and Vibration Research, University of Southampton, Highfield, Southampton, SO17 1BJ, UK |
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| Abstract: | Using an in vitro method, juvenile hormone III degradation was studied in the plasma of adult female and male crickets, Gryllus bimaculatus. The primary route of juvenile hormone III metabolism in cricket haemolymph is ester hydrolysis to juvenile hormone III acid by juvenile hormone III esterase. Juvenile hormone III esterase activity in females' haemolymph is low just after imaginal moulting. A sharp peak of enzyme activity is observed on day 3 after emergence, and two subsequent peak values occur in older animals. Plasma juvenile hormone III esterase activity in freshly ecdysed males is also low, but increases rapidly thereafter. Another increase in enzyme activity is observed in older males. The fluctuations in juvenile hormone III esterase activity are discussed in correlation with changes in haemolymph volume, haemolymph protein content, haemolymph juvenile hormone III titer, and the rates of juvenile hormone III biosynthesis in vitro of the corpora allata. |
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