
해양 동물플랑크톤인 Platynereis 유생은 뇌의 섬모 광수용체 세포를 통해 압력 변화를 감지하고, 이를 세로토닌성 운동신경세포를 거쳐 섬모 운동 증가로 반응한다.


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Hydrostatic pressure is a dominant environmental cue for vertically migrating marine organisms but the physiological mechanisms of responding to pressure changes remain unclear. Here we uncovered the cellular and circuit bases of a barokinetic response in the planktonic larva of the marine annelid Platynereis dumerilii . Increased pressure induced a rapid, graded and adapting upward swimming response due to the faster beating of cilia in the head multiciliary band. By calcium imaging, we found that brain ciliary photoreceptors showed a graded response to pressure changes. The photoreceptors in animals mutant for ciliary opsin-1 had a smaller sensory compartment and mutant larvae showed diminished pressure responses. The ciliary photoreceptors synaptically connect to the head multiciliary band via serotonergic motoneurons. Genetic inhibition of the serotonergic cells blocked pressure-dependent increases in ciliary beating. We conclude that ciliary photoreceptors function as pressure sensors and activate ciliary beating through serotonergic signalling during barokinesis.

### Competing Interest Statement

The authors have declared no competing interest.

Mechanism of barotaxis in marine zooplankton

해양-동물플랑크톤의-압력-반응을-매개하는-섬모-광수용체-세포-회로


해양 동물플랑크톤의 압력 반응을 매개하는 섬모 광수용체 세포 회로
