Complex diel cycles of gene expression in coral-algal symbiosis

Journal Publication ResearchOnline@JCU
Levy, O.;Kaniewska, P.;Alon, S.;Eisenberg, E.;Karako-Lampert , S.;Bay, L.K.;Reef, R.;Rodriguez-Lanetty , M.;Miller, D.J.;Hoegh-Guldberg, O.
David Miller
Abstract

Circadian regulation of plant-animal endosymbioses is complicated by a diversity of internal and external cues. Here, we show that stress-related genes in corals are coupled to the circadian clock, anticipating major changes in the intracellular milieu. In this regard, numerous chaperones are "hard-wired" to the clock, effectively preparing the coral for the consequences of oxidative protein damage imposed by symbiont photosynthesis (when O2 > 250% saturation), including synexpression of antioxidant genes being light-gated. Conversely, central metabolism appears to be regulated by the hypoxia-inducible factor system in coral. These results reveal the complexity of endosymbiosis as well as the plasticity regulation downstream of the circadian clock.

Journal

Science

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N/A

Volume

331

ISBN/ISSN

1095-9203

Edition

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Issue

6014

Pages Count

1

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Publisher

American Association for the Advancement of Science

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EISSN

N/A

DOI

10.1126/science.1196419