Insights into the evolutionary origin of the pineal color discrimination mechanism from the river lamprey.

ABSTRACT:

Background

Pineal-related organs in cyclostomes, teleosts, amphibians, and reptiles exhibit color opponency, generating antagonistic neural responses to different wavelengths of light and thereby sensory information about its "color". Our previous studies suggested that in zebrafish and iguana pineal-related organs, a single photoreceptor cell expressing both UV-sensitive parapinopsin and green-sensitive parietopsin generates color opponency in a "one-cell system." However, it remains unknown to what degree these opsins and the single cell-based mechanism in the pineal color opponency are conserved throughout non-mammalian vertebrates.

Results

We found that in the lamprey pineal organ, the two opsins are conserved but that, in contrast to the situation in other vertebrate pi

SUBMITTER: Wada S 

PROVIDER: S-EPMC8444496 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature