Picobiliphytes: A Marine Picoplanktonic Algal Group with Unknown Affinities to Other Eukaryotes


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kvalentin [ at ] awi-bremerhaven.de

Abstract

Environmental sequencing has revealed unimagined diversity among eukaryotic picoplankton. A distinct picoplanktonic algal group, initially detected from 18S ribosomal DNA (rDNA) sequences, was hybridized with rRNA-targeted probes, detected by tyramide signal amplification-fluorescent in situ hybridization, and showed an organelle-like body with orange fluorescence indicative of phycobilins. Using this fluorescence signal, cells were sorted by flow cytometry and probed. Hybridized cells contained a 4',6'-diamidino-2-phenylindole-stained organelle resembling a plastid with a nucleomorph. This suggests that they may be secondary endosymbiotic algae. Pending the isolation of living cells and their formal description, these algae have been termed picobiliphytes.



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16025
DOI https://www.doi.org/10.1126/science.1136264

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Not, F. , Valentin, K. , Romari, K. , Lovejoy, C. , Massana, R. , Töbe, K. , Vaulot, D. and Medlin, L. K. (2007): Picobiliphytes: A Marine Picoplanktonic Algal Group with Unknown Affinities to Other Eukaryotes , Science, 315 (5809), pp. 253-255 . doi: https://www.doi.org/10.1126/science.1136264


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