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. 2014 Aug 25;5:445. doi: 10.3389/fmicb.2014.00445

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Copyright © 2014 Parkinson and Baums.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Preliminary analysis of the Astrangia poculata–Symbiodinium psygmophilum metabolome. (A) Principle component analysis of metabolite profiles. Shown are principle components 1 and 2 (x- and y-axis, respectively) of Pareto-transformed metabolite data. Shapes indicate host genotype (n = 3). Black fills correspond to symbiont-rich polyps. White fills correspond to nearly symbiont-free polyps. “S” indicates a sample of a Symbiodinium psygmophilum monoculture. “N” indicates a negative control (purified water). Astrangia poculata samples cluster by the symbiotic state of the polyps rather than by host genotype. (B) Repre sentative profiles for specific metabolites. C16-Lyso-PAF was abundant in non-symbiotic polyps but low in symbiotic polyps and absent in Symbiodinium culture. 13E-Docosenamide was mainly present in Symbiodinium culture but not in coral tissue. The two unidentified compounds are characteristic of metabolites with greater detection in symbiotic (Unidentified-A) or non-symbiotic (Unidentified-B) polyps. Polato et al. (unpublished data).