Coordination of spermathecal muscle activity with oviposition in Locusta migratoria.

Abstract

Event Abstract Back to Event Coordination of spermathecal muscle activity with oviposition in Locusta migratoria. Angela Lange1* and Rosa Da Silva1 1 University of Toronto Mississauga, Department of Biology, Canada The spermatheca, oviducts and oviposition digging muscles are under neural and neuromodulatory control of a variety of neuroactive chemicals, including biogenic amines and neuropeptides. Some of these neuroactive chemicals are released following appropriate neural activity and help coordinate the activity of these reproductive tissues such that eggs are fertilized and deposited at appropriate times. Electrophysiological recordings were conducted to determine the control of spermathecal contractions during oviposition of interrupted egg-laying locusts. Following transection of the central nervous system below the metathoracic ganglion, rhythmic patterned bursting was observed in the nerve, N2B2 that innervates the spermatheca. Subsequent transections at more posterior regions of the ventral nerve cord revealed more robust rhythmic bursting in N2B2. This rhythmic bursting pattern was found to be coordinated with bursting in the ventral opener nerve that innervates the ventral opener muscle. This muscle controls the ventral ovipositor valves. Electromyographic recordings from the spermathecal muscle and ventral opener muscle confirmed rhythmic bursting resulted in an increase in muscle activity with observable muscle contractions. Taken together, the results indicate that there is likely a central pattern generator (CPG) that is regulated by descending inhibition that controls the spermathecal muscle activity. This CPG appears to be localized within the VIIth and VIIIth abdominal ganglia, and was found to integrate with the CPG that regulates oviposition digging in locusts. These results provide further insight into the intricate coordination and control of reproductive tissues underlying reproductive behaviours in locusts. Acknowledgements This study was supported by NSERC Keywords: comparative endocrinology Conference: 25th Conference of the European Comparative Endocrinologists, Pécs, Hungary, 31 Aug - 4 Sep, 2010. Presentation Type: Conference Presentation Topic: Comparative endocrinology Citation: Lange A and Da Silva R (2010). Coordination of spermathecal muscle activity with oviposition in Locusta migratoria.. Front. Endocrinol. Conference Abstract: 25th Conference of the European Comparative Endocrinologists. doi: 10.3389/conf.fendo.2010.01.00045 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 26 Aug 2010; Published Online: 29 Aug 2010. * Correspondence: Dr. Angela Lange, University of Toronto Mississauga, Department of Biology, Mississauga, Canada, angela.lange@utoronto.ca Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Angela Lange Rosa Da Silva Google Angela Lange Rosa Da Silva Google Scholar Angela Lange Rosa Da Silva PubMed Angela Lange Rosa Da Silva Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.