Acidification and γ-aminobutyric acid independently alter kairomone-induced behaviour.

Acidification and γ-aminobutyric acid independently alter kairomone-induced behaviour.
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DOI:
10.1098/rsos.160311
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发表时间:
2016-09
影响因子:
3.5
通讯作者:
Cohen JH
Cohen JH
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Charpentier CL;Cohen JH

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暴露于高二氧化碳分压或低pH值会改变许多海洋动物的感觉和行为。我们发现,在沿海环境中,在与pH值周期相关的时间尺度上,暴露于低pH值后,螃蟹幼虫失去了检测和/或处理捕食者激素的能力。先前的研究表明,酸化通过改变神经功能来影响感觉和行为,特别是γ-氨基丁酸(GABA)的作用,因为GABA拮抗剂gabazine可以恢复原始行为。然而,在这里,gabazine导致了kairomone检测/处理的丧失,而与ph无关。我们的研究结果还表明,GABAergic信号对于这些幼虫的kairomone识别是必要的。因此,观察到的pH效应的机制与最初的GABA假设不同。此外,我们认为这种pH效应在双循环pH下是自适应的。
Exposure to high pCO2 or low pH alters sensation and behaviour in many marine animals. We show that crab larvae lose their ability to detect and/or process predator kairomones after exposure to low pH over a time scale relevant to diel pH cycles in coastal environments. Previous work suggests that acidification affects sensation and behaviour through altered neural function, specifically the action of γ-aminobutyric acid (GABA), because a GABA antagonist, gabazine, restores the original behaviour. Here, however, gabazine resulted in a loss of kairomone detection/processing, regardless of pH. Our results also suggest that GABAergic signalling is necessary for kairomone identification in these larvae. Hence, the mechanism for the observed pH effect varies from the original GABA hypothesis. Furthermore, we suggest that this pH effect is adaptive under diel-cycling pH.
DOI: 10.1016/j.jembe.2011.11.013
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