Widely rhythmic transcriptome in Calanus finmarchicus during the high Arctic summer solstice period

iScience

Céline Noirot¹  David Wilcockson²  Lukas Hüppe³  Kim S. Last³  Laura Payton⁴  Claire Hoede⁴  Elizaveta Ershova⁵  Sophie Valière⁵  Bettina Meyer⁶ 

[1] Corresponding author;Helmholtz Institute for Functional Marine Biodiversity (HIFMB) at the University of Oldenburg, Oldenburg, 26111, Germany;Section Polar Biological Oceanography, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, 27570, Germany;Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky University of Oldenburg, Oldenburg, 26111, Germany;Plateforme bio-informatique GenoToul, MIAT, INRAE, UR875 Mathématiques et Informatique Appliquées Toulouse, 31326 Castanet-Tolosan, France;Scottish Association for Marine Science, Oban, Argyll PA37 1QA, UK;

关键词: Microbiology;    Systems Biology;    Transcriptomics;   

DOI  :  

来源: DOAJ

【 摘 要 】

Summary: Solar light/dark cycles and seasonal photoperiods underpin daily and annual rhythms of life on Earth. Yet, the Arctic is characterized by several months of permanent illumination (“midnight sun”). To determine the persistence of 24h rhythms during the midnight sun, we investigated transcriptomic dynamics in the copepod Calanus finmarchicus during the summer solstice period in the Arctic, with the lowest diel oscillation and the highest altitude of the sun's position. Here we reveal that in these extreme photic conditions, a widely rhythmic daily transcriptome exists, showing that very weak solar cues are sufficient to entrain organisms. Furthermore, at extremely high latitudes and under sea-ice, gene oscillations become re-organized to include <24h rhythms. Environmental synchronization may therefore be modulated to include non-photic signals (i.e. tidal cycles). The ability of zooplankton to be synchronized by extremely weak diel and potentially tidal cycles, may confer an adaptive temporal reorganization of biological processes at high latitudes.

【 授权许可】

Unknown