Sugitani Kouki, Ohnishi Reika, Inaoka Daigo, Ono Hiroki, Hirohashi Noritaka
Shimane University, Matsue, Shimane, Japan.
MicroPubl Biol. 2024 Dec 17;2024. doi: 10.17912/micropub.biology.001410. eCollection 2024.
The reversal of phototaxis has been observed in a wide range of animal species. However, environmental chemicals that can cause a quick reversal of phototaxis have rarely been reported. Here we identified hypochlorous acid (HClO) as an inducer of phototactic reversal in , also known as sea fireflies. This species shows innate photophobic swimming behavior away from light sources and 0.1% HClO triggers rapid positive phototactic responses, that is reversible upon washout. Phototactic assays using monochromatic light irradiation revealed the highest photophobic responses at 460 nm, while the HClO-induced photophilic responses were observed widely, even in UV light.
在多种动物物种中都观察到了趋光性的逆转。然而，很少有报道称环境化学物质会导致趋光性快速逆转。在这里，我们确定次氯酸（HClO）是海萤（也称为海火虫）趋光性逆转的诱导剂。该物种表现出远离光源的先天性避光游泳行为，0.1%的HClO会引发快速的正向趋光反应，冲洗后这种反应是可逆的。使用单色光照射的趋光性测定表明，在460纳米处避光反应最强，而HClO诱导的趋光反应在很宽的光谱范围内都能观察到，甚至在紫外光下也是如此。
