Effects of pars intercerebralis removal on circatidal rhythm in the mangrove cricket, Apteronemobius asahinai
Effects of pars intercerebralis removal on circatidal rhythm in the mangrove cricket, Apteronemobius asahinai
复制标题
去除脑间部对红树林蟋蟀 (Apteronemobius asahinai) 昼夜节律的影响
DOI：
10.1007/s00359-018-1281-1
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Sakiko Shiga
中科院分区：
文献类型：
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作者：
Hiroki Takekata;Hideharu Numata;Sakiko Shiga
昼夜节律是与潮汐周期相对应的内源性节律，其神经机制尚不清楚。红树林蟋蟀Apteronemobius asahinai同时具有昼夜节律和昼夜节律，其运动活动具有昼夜节律和昼夜节律。在之前的研究中，我们发现手术切除视叶（蟋蟀的主要生物钟位点）会扰乱它们的昼夜节律，但不会扰乱它们的昼夜节律。在这项研究中，我们专注于大脑间部（PI），因为手术切除PI会扰乱昼夜节律，并导致某些蟋蟀物种的活动。手术切除PI后，蟋蟀显示昼夜节律的比例下降，超过一半的蟋蟀表现出节律活动。手术切除PI周围的区域也对自发活动产生了类似的影响。我们的研究结果表明，PI和/或其周围地区是重要的，不仅昼夜节律，而且昼夜节律。这表明PI和/或其周围区域中存在昼夜节律和昼夜节律共有的神经或激素通路。
The circatidal rhythm is an endogenous rhythm corresponding to the tidal cycles, and its neural mechanism remains unknown. The mangrove cricket,Apteronemobius asahinai, possesses both circatidal and circadian clocks, and simultaneously exhibits circatidal and circadian rhythms in its locomotor activity. In a previous study, we showed that surgical removal of the optic lobes, the principal circadian clock locus in crickets, disrupted their circadian rhythm, but not their circatidal rhythm. In this study, we focused on the pars intercerebralis (PI) because surgical removal of the PI disrupts the circadian rhythm and causes arrhythmic activity in some cricket species. After surgical removal of the PI, the proportion of crickets displaying circatidal rhythm decreased, and more than half of the crickets exhibited arrhythmic activity. Surgical removal of the regions around the PI also caused a similar effect on locomotor activity. Our results indicate that the PI and/or its surrounding regions are important not only for circadian but also for circatidal rhythm. This suggests the presence of a neural or hormonal pathway in the PI and/or its surrounding regions that is common to the circatidal and circadian rhythms.