Howard Ryan B, Kniller Jessica, Bolstad Kathrin S R, Acosta Monica L
AUT Lab for Cephalopod Ecology & Systematics, School of Science, Auckland University of Technology, Auckland 1010, New Zealand.
School of Optometry and Vision Science, New Zealand National Eye Centre (NZ-NEC), University of Auckland, Auckland 1010, New Zealand.
Vision (Basel). 2024 Apr 25;8(2):26. doi: 10.3390/vision8020026.
The outward migration of ommin pigment granules from the bases to the tips of the photoreceptors in response to light has been reported in the retina of several (mostly coastal) squid species. Following exposure to light and then dark conditions, we collected and processed retinal tissue from juvenile specimens of a deep-sea oegopsid squid, . We aimed to determine whether the ommin pigment returns to baseline, and to investigate the presence of glutamate neurotransmitter signaling under both dark and light conditions. We confirmed the presence of ommin granules but observed variability in the return of pigment to the basal layer in dark conditions, as well as changes in glutamate distribution. These findings provide support for the migration of retinal ommin pigment granules as a mechanism for regulating incoming light.
据报道，在几种（大多为沿海的）鱿鱼物种的视网膜中，存在视紫质色素颗粒从光感受器基部向尖端的向外迁移，以响应光线。在暴露于光照然后黑暗条件后，我们从一种深海开眼亚目鱿鱼的幼体标本中收集并处理了视网膜组织。我们旨在确定视紫质色素是否恢复到基线水平，并研究在黑暗和光照条件下谷氨酸神经递质信号的存在情况。我们证实了视紫质颗粒的存在，但观察到在黑暗条件下色素返回基底层存在变异性，以及谷氨酸分布的变化。这些发现为视网膜视紫质色素颗粒的迁移作为一种调节入射光的机制提供了支持。
