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Gene Expression Profiles of Two Coral Species with Varied Resistance to Ocean Acidification

  • Xiangcheng YuanEmail author
  • Hui HuangEmail author
  • Weihua Zhou
  • Yajuan Guo
  • Tao Yuan
  • Sheng Liu
Original Article

Abstract

Recent studies have indicated that various corals might have different degrees of resistance to elevated CO2 levels. However, the underlying molecular mechanism accounting for these differences is still poorly understood. In this study, RNA-seq data were analyzed to identify differentially expressed genes in two coral species (Acropora austera and Acropora cerealis) in response to high CO2 levels. The calcification rates were higher in high CO2 treatment than the control in A. austera, but was not significantly different in A. cerealis. A KEGG database search revealed that in both coral species, most Ca2+ transporters were present in the calcium signaling pathway, which could be important in the CO2 regulation of coral calcification. The gene expression levels of many CO2 and HCO3 transporters were not affected by elevated CO2. Nevertheless, high CO2 levels did have an effect on the expression of certain Ca2+ transporters. The upregulation of Ca2+ transporters likely explained the higher resistance of A. austera to high CO2 than A. cerealis.

Keywords

Calcium signaling pathway CO2 Coral Coral calcifying fluid Oceanic acidification 

Notes

Acknowledgements

We thank the Strategic Priority Research Program of the Chinese Academy of Sciences and the National Key Technology R&D Program for their financial assistance (Grant Nos. XDA13020403 and 2014BAC01B03, respectively). Thank Y.L. Gao for comments.

Compliance with Ethical Standards

Conflict of Interest

The authors declare that they have no conflicts of interest.

Supplementary material

10126_2018_9864_MOESM1_ESM.docx (1.3 mb)
ESM 1 (DOCX 1324 kb)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhouChina
  2. 2.Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhouChina
  3. 3.Tropical Marine Biological Research Station in HainanChinese Academy of SciencesSanyaChina
  4. 4.Equipment Public Service Center, South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhouChina

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