Neural Mechanism of Photoperiodism
Neural Mechanism of Photoperiodism
复制标题
光周期现象的神经机制
DOI：
10.1007/978-981-99-0726-7_14
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Shiga Sakiko
中科院分区：
文献类型：
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作者：
Hirata Kazune;Shiga Sakiko;Shiga Sakiko
在光周期的神经机制中，光周期信息由光感受器接收，并在大脑的光周期时钟和计数器中进行处理。然后，经过处理的信号被切换到内分泌器官。神经解剖学、显微外科和电生理学，结合RNA干扰，揭示了在大脑间部和外侧部使用昼夜节钟细胞和神经分泌细胞的光周期神经电路。在斑潜蝇和胡枝纹夜蛾中，髓质区的前底部含有时钟蛋白周期细胞和神经肽色素分散因子细胞，是光周期机制的潜在场所。INP。TerraenovaePeriod核定位表明，S-LNV和DNM的时钟细胞对环境光暗周期具有不同的相位设置。通过比较S-LNV和DNM的时钟相位，可以区分出短白天和长白天。INR。胡枝核、大脑间部神经元的放电活动表现出光周期反应，这取决于膜表达的变化。神经递质谷氨酸在骨膜压力作用下将短日光信号传递给大脑间部神经元。在所提出的神经回路中，应该揭示细胞对短白天和长白天的电活动、基因表达和纤维投射模式的反应，以在未来的研究中理解光周期时钟和逆时针机制。
In neural mechanisms underlying photoperiodism, photoperiodic information is received by photoreceptors and is processed in the photoperiodic clock and counter in the brain. The processed signals are then switched to the endocrine organs. Neuroanatomy, microsurgery, and electrophysiology, in combination with RNA interference, have revealed plausible photoperiodic neural circuitries that employ circadian clock cells and neurosecretory cells in the pars intercerebralis and pars lateralis. In the blow flyProtophormia terraenovaeand the bean bugRiptortus pedestris, an anterior base of the medulla region containing clock protein PERIOD cells and neuropeptide pigment-dispersing factor cells is a potential site for photoperiodic mechanisms. InP. terraenovaePERIOD nuclear localization suggests that clock cells of s-LNv and DNm have different phase settings to environmental light-dark cycles. By comparing the clock phases of s-LNv and DNm, short and long days are distinguishable. InR. pedestris, pars intercerebralis neurons show a photoperiodic response in their firing activities, depending on theperiodexpression. The neurotransmitter glutamate mediates short-day signals to pars intercerebralis neurons underperiodexpression. In the proposed neural circuitry, cellular responses such as electrical activities, gene expression, and fiber projection patterns to short and long days should be revealed to understand the photoperiodic clock and counter mechanisms in future studies.