Arid
DOI10.3389/fnbeh.2014.00371
Dopaminergic modulation of phase reversal in desert locusts
Alessi, Ahmad M.1; O’Connor, Vincent2; Aonuma, Hitoshi3; Newland, Philip L.2
通讯作者Newland, Philip L.
来源期刊FRONTIERS IN BEHAVIORAL NEUROSCIENCE
ISSN1662-5153
出版年2014
卷号8
英文摘要

Phenotypic plasticity allows animals to modify their behavior, physiology, and morphology to adapt to environmental change. The global pest, the desert locust, shows two extreme phenotypes; a solitarious phase that is relatively harmless and a gregarious phase that forms swarms and causes extensive agricultural and economic damage. In the field, environmental conditions can drive isolated animals into crowded populations and previous studies have identified the biogenic amine serotonin as a key determinant of this transition. Here we take an integrated approach to investigate the neurochemical, physiological, and behavioral correlates defined by a laboratory based paradigm that mimics facets of swarm break down as gregarious locusts become isolated. Following isolation there was an increased propensity of locusts to avoid conspecifics, and show a reduced locomotion. Changes in choice behavior occurred within 1 h of isolation although isolation-related changes progressed with increased isolation time. Isolation was accompanied by changes in the levels of the biogenic amines dopamine, octopamine, and serotonin within the CNS within 1 h. Dopamine levels were higher in isolated animals and we focused on the role played by this transmitter in synaptic changes that may underpin solitarization. Dopamine reduced synaptic efficacy at a key central synapse between campaniform sensilla (CS) and a fast extensor tibiae motor neuron that is involved in limb movement. We also show that dopamine injection into the haemocoel was sufficient to induce solitarious-like behavior in otherwise gregarious locusts. Further, injection of a dopamine antagonist, fluphenazine, into isolated locusts induced gregarious-like behavior. This highlights that dopaminergic modulation plays an important role in the plasticity underpinning phase transition and sets a context to deepen the understanding of the complementary role that distinct neuromodulators play in polyphenism in locusts.


英文关键词grasshopper polyphenism swarming neural network plasticity
类型Article
语种英语
国家Saudi Arabia ; England ; Japan
收录类别SCI-E
WOS记录号WOS:000347924600001
WOS关键词PHENOTYPIC PLASTICITY ; SCHISTOCERCA-GREGARIA ; BIOGENIC-AMINES ; SYNAPTIC-TRANSMISSION ; OCTOPAMINERGIC MODULATION ; BEHAVIORAL GREGARIZATION ; MOLECULAR-BIOLOGY ; MOTOR-NEURONS ; HIND LEG ; SEROTONIN
WOS类目Behavioral Sciences ; Neurosciences
WOS研究方向Behavioral Sciences ; Neurosciences & Neurology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/182139
作者单位1.Umm al Qura Univ, Univ Coll Qunfudah, Qunfudah, Makkah, Saudi Arabia;
2.Univ Southampton, Fac Nat & Environm Sci, Ctr Biol Sci, Southampton SO17 1BJ, Hants, England;
3.Hokkaido Univ, Res Inst Elect Sci, Sapporo, Hokkaido, Japan
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GB/T 7714
Alessi, Ahmad M.,O’Connor, Vincent,Aonuma, Hitoshi,et al. Dopaminergic modulation of phase reversal in desert locusts[J],2014,8.
APA Alessi, Ahmad M.,O’Connor, Vincent,Aonuma, Hitoshi,&Newland, Philip L..(2014).Dopaminergic modulation of phase reversal in desert locusts.FRONTIERS IN BEHAVIORAL NEUROSCIENCE,8.
MLA Alessi, Ahmad M.,et al."Dopaminergic modulation of phase reversal in desert locusts".FRONTIERS IN BEHAVIORAL NEUROSCIENCE 8(2014).
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