Transcriptomic differences between day and night in <i>Acropora millepora</i> provide new insights into metabolite exchange and light‐enhanced calcification in corals

Bertucci, Anthony; Fôret, Sylvain; Ball, Eldon E.; Miller, David J.

doi:10.1111/mec.13328

Cited by 68 publications

(61 citation statements)

References 90 publications

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“…Genes involved in calcium carbonate precipitation are more active in the daytime, as has been previously described (Bertucci et al . ; Hemond & Vollmer ; Kaniewska et al . ; Oren et al .…”

Section: Discussionmentioning

confidence: 99%

Transcriptome dynamics over a lunar month in a broadcast spawning acroporid coral

et al. 2017

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On one night per year, at a specific point in the lunar cycle, one of the most extraordinary reproductive events on the planet unfolds as hundreds of millions of broadcast spawning corals release their trillions of gametes into the waters of the tropical seas. Each species spawns on a specific night within the lunar cycle, typically from full moon to third quarter moon, and in a specific time window after sunset. This accuracy is essential to achieve efficient fertilization in the vastness of the oceans. In this report, we use transcriptome sequencing at noon and midnight across an entire lunar cycle to explore how acroporid corals interpret lunar signals. The data were interrogated by both time-of-day-dependent and time-of-day-independent methods to identify different types of lunar cycles. Time-of-day methods found that genes associated with biological clocks and circadian processes change their diurnal cycles over the course of a synodic lunar cycle. Some genes have large differences between day and night at some lunar phases, but little or no diurnal differences at other phases. Many clock genes display an oscillation pattern indicative of phase shifts linked to the lunar cycle. Time-independent methods found that signal transduction, protein secretion and modification, cell cycle and ion transport change over the lunar timescale and peak at various phases of the moon. Together these data provide unique insights into how the moon impinges on coral transcription cycles and how lunar light may regulate circalunar timing systems and coral biology.

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“…Genes involved in calcium carbonate precipitation are more active in the daytime, as has been previously described (Bertucci et al . ; Hemond & Vollmer ; Kaniewska et al . ; Oren et al .…”

Section: Discussionmentioning

confidence: 99%

Transcriptome dynamics over a lunar month in a broadcast spawning acroporid coral

et al. 2017

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“…GABA (gamma-amino butyric acid) is one of many neurotransmitters within the central nervous system of cnidarians that helps regulate circadian rhythms in corals2829 and modulates feeding responses in the cnidarian Hydra vulgaris 303132. Two receptors are associated with the neurotransmitter GABA: GABA A and GABA B .…”

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confidence: 99%

Reduced heterotrophy in the stony coral Galaxea fascicularis after life-long exposure to elevated carbon dioxide

Smith

Strahl

Noonan

et al. 2016

Sci Rep

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Ocean acidification imposes many physiological, energetic, structural and ecological challenges to stony corals. While some corals may increase autotrophy under ocean acidification, another potential mechanism to alleviate some of the adverse effects on their physiology is to increase heterotrophy. We compared the feeding rates of Galaxea fascicularis colonies that have lived their entire lives under ocean acidification conditions at natural carbon dioxide (CO 2 ) seeps with colonies living under present-day CO 2 conditions. When provided with the same quantity and composition of zooplankton as food, corals acclimatized to high CO 2 showed 2.8 to 4.8 times depressed rates of zooplankton feeding. Results were consistent over four experiments, from two expeditions and both in field and chamber measurements. Unless replenished by other sources, reduced zooplankton uptake in G. fascicularis acclimatized to ocean acidification is likely to entail a shortage of vital nutrients, potentially jeopardizing their health and survival in future oceans.

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“…This light‐enhanced calcification process has been justified by the assumption that (1) the photosynthesis increases the pH in the coelenteron and (2) acts in supplying precursors of the organic matrix . In Acropora millepora (symbiotic) ion transporters were not differentially expressed during the day or night and expression levels of genes associated with skeletal organic matrix were higher in light conditions …”

Section: Introductionmentioning

confidence: 95%

In Vitro Coral Biomineralization under Relevant Aragonite Supersaturation Conditions

Džakula

Fermani

Dubinsky

et al. 2019

Chemistry A European J

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The biomineralization of corals occurs under conditions of high and low supersaturation with respect to aragonite, which corresponds to day‐ or night‐time periods of their growth, respectively. Here, in vitro precipitation of aragonite in artificial seawater was investigated at a high supersaturation, allowing spontaneous nucleation and growth, as well as at low supersaturation conditions, which allowed only the crystal growth on the deliberately introduced aragonite seeds. In either chemical systems, soluble organic matrix (SOM) extracted from Balanophyllia europaea (light sensitive) or Leptopsammia pruvoti (light insensitive) was added. The analyses of the kinetic and thermodynamic data of aragonite precipitation and microscopic observations showed that, at high supersaturation, the SOMs increased the induction time, did not affect the growth rate and were incorporated within aggregates of nanoparticles. At low supersaturation, the SOMs affected the aggregation of overgrowing crystalline units and did not substantially change the growth rate. On the basis of the obtained results we can infer that at high supersaturation conditions the formation of nanoparticles, which is typically observed in the skeleton's early mineralization zone may occur, whereas at low supersaturation the overgrowth on prismatic seeds observed in the skeleton fiber zone is a predominant process. In conclusion, this research brings insight on coral skeletogenesis bridging physicochemical (supersaturation) and biological (role of SOM) models of coral biomineralization and provides a source of inspiration for the precipitation of composite materials under different conditions of supersaturation.

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Transcriptomic differences between day and night in Acropora millepora provide new insights into metabolite exchange and light‐enhanced calcification in corals

Cited by 68 publications

References 90 publications

Transcriptome dynamics over a lunar month in a broadcast spawning acroporid coral

Transcriptome dynamics over a lunar month in a broadcast spawning acroporid coral

Reduced heterotrophy in the stony coral Galaxea fascicularis after life-long exposure to elevated carbon dioxide

In Vitro Coral Biomineralization under Relevant Aragonite Supersaturation Conditions

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