Abstract
Introduction
Research aimed at understanding intraspecific variation among corals could substantially increase understanding of coral biology and improve outcomes of active restoration efforts. Metabolomics is useful for identifying physiological drivers leading to variation among genotypes and has the capacity to improve our selection of candidate corals that express phenotypes beneficial to restoration.
Objectives
Our study aims to compare metabolomic profiles among known, unique genotypes of the threatened coral Acropora cervicornis. In doing so, we seek information related to the physiological characteristics driving variation among genotypes, which could aid in identifying genets with desirable traits for restoration.
Methods
We applied proton nuclear magnetic resonance (1H-NMR) and liquid chromatography-mass spectrometry (LC-MS) to identify and compare metabolomic profiles for seven unique genotypes of A. cervicornis that previously exhibited phenotypic variation in a common garden coral nursery.
Results
Significant variation in polar and nonpolar metabolite profiles was found among A. cervicornis genotypes. Despite difficulties identifying all significant metabolites driving separation among genotypes, our data support previous findings and further suggest metabolomic profiles differ among various genotypes of the threatened species A. cervicornis.
Conclusion
The implementation of metabolomic analyses allowed identification of several key metabolites driving separation among genotypes and expanded our understanding of the A. cervicornis metabolome. Although our research is specific to A. cervicornis, these findings have broad relevance for coral biology and active restoration. Furthermore, this study provides specific information on the understudied A. cervicornis metabolome and further confirmation that differences in metabolome structure could drive phenotypic variation among genotypes.
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Acknowledgements
This publication was made possible by the University of Florida’s Southeast Center for Integrated Metabolomics through grant number U24DK097209 from the National Institute of Health’s Common Fund metabolomics program. Partial support was provided by USDA/NIFA HATCH project #FLA-FOR-005902. All the NMR works were performed in the McKnight Brain Institute at the National High Magnetic Field Laboratory’s (NHMFL) Advanced Magnetic Resonance Imaging and Spectroscopy (AMRIS) Facility, funded by National Science Foundation Cooperative Agreement No. DMR-1644779 and the State of Florida. Corals used in this study were sampled under permit FKNMS-2016-129-A1 issued to Joshua Patterson. We would like to thank all members of the Patterson Lab for their help collecting and processing samples. Furthermore, we greatly appreciate the Coral Restoration Foundation for allowing us to sample their corals.
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JH, JP, RK, MM, JG and TG designed research. JH, KL and JP collected samples. JH and KL performed metabolite extraction. RK and MM processed and analyzed samples in 1H-NMR. JC and TG processed and analyzed samples in LC-MS. JH, JP and KL analyzed data; JH, KL and JP wrote the manuscript. All authors read and approved the manuscript.
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Henry, J.A., Khattri, R.B., Guingab-Cagmat, J. et al. Intraspecific variation in polar and nonpolar metabolite profiles of a threatened Caribbean coral. Metabolomics 17, 60 (2021). https://doi.org/10.1007/s11306-021-01808-0
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DOI: https://doi.org/10.1007/s11306-021-01808-0