Photoreception and transcriptomic response to light during early development of a teleost with a life cycle tightly controlled by seasonal changes in photoperiod ...

• Main Authors: Eilertsen, M, Dolan, DWP, Bolton, CM, Karlsen, R, Davies, Wayne, Edvardsen, RB, Furmanek, T, Sveier, H, Migaud, H, Helvik, JV
• Format: Text
• Language: unknown
• Published: La Trobe 2023
• Subjects: Biological sciences; FOS Biological sciences; Genetics; Atlantic salmon; Salmo salar
• Online Access: https://dx.doi.org/10.26181/23544204.v1; https://opal.latrobe.edu.au/articles/journal_contribution/Photoreception_and_transcriptomic_response_to_light_during_early_development_of_a_teleost_with_a_life_cycle_tightly_controlled_by_seasonal_changes_in_photoperiod/23544204/1

Light cues vary along the axis of periodicity, intensity and spectrum and perception of light is dependent on the photoreceptive capacity encoded within the genome and the opsins expressed. A global approach was taken to analyze the photoreceptive capacity and the effect of differing light conditions on a developing teleost prior to first feeding. The transcriptomes of embryos and alevins of Atlantic salmon (Salmo salar) exposed to different light conditions were analyzed, including a developmental series and a circadian profile. The results showed that genes mediating nonvisual photoreception are present prior to hatching when the retina is poorly differentiated. The clock genes were expressed early, but the circadian profile showed that only two clock genes were significantly cycling before first feeding. Few genes were differentially expressed between day and night within a light condition; however, many genes were significantly different between light conditions, indicating that light environment has an ...