The role of juvenile hormone and juvenile hormone esterase in wing morph determination in Modicogryllus confirmatus |
| |
| Institution: | 1. Department of Insect Physiology and Behavior, National Institute of Sericultural and Entomological Science, Tsukuba, Ibaraki, 305, Japan;2. School of Biological Sciences, University of Nebraska, Lincoln, Nebraska 68588, U.S.A.;1. Faculty of Computer Science, Dalhousie University, 6050 University Avenue, PO Box 15000, Halifax, Nova Scotia B3H 4R2, Canada;1. Department of Developmental Pharmacology, National Organization for Drug Control and Research, Egypt;2. Department of Pharmacology & Toxicology, Faculty of Pharmacy, Cairo University, Egypt;1. National Engineering Laboratory of Marine Germplasm Resources Exploration and Utilization, Zhejiang Ocean University, 316022, Zhoushan, China;2. National Engineering Research Center for Facilitated Marine Aquaculture, Marine Science and Technology College, Zhejiang Ocean University, 316022, Zhoushan, China;3. Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510000, China;4. South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center, Guangzhou, 510000, China |
| |
| Abstract: | The role of juvenile hormone (JH) and juvenile hormone esterase (JHE) in regulating wing morph determination was studied in the cricket Modicogryllus confirmatus. JHE activities were significantly higher in nascent long-winged (LW) vs short-winged (SW) crickets during the latter half but not during the first half of the last stadium. The magnitude and direction of the activity differences were similar to those previously documented between wing morphs of the cricket, Gryllus rubens. In contrast, activities of general esterase, an enzyme or group of enzymes with no demonstrated role in regulating the JH titer in insects, showed no or only minor differences between morphs. The magnitude and direction of the JHE activity variation is consistent with a regulatory role for this enzyme in some aspect of wing dimorphism. However, the timing of the differences (exclusively during the last half of the last stadium) argue against a role in regulating wing length development per se. Single or multiple applications of juvenile hormone-III to nascent LW individuals during the first few days of the last stadium significantly redirected development from long to short wings. Multiple applications of acetone, by itself, also increased the production of short-winged adults. For most treatments, all individuals with shortened wings also had undeveloped flight muscles. These data suggest that JH may play a role in wing morph determination in M. confirmatus but that it affects a different aspect of the polymorphism from JHE. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
