MICR 4280 Lecture Notes - Lecture 20: Pelagibacter Ubique, Prochlorococcus, Synechococcus
19 Mar 2019
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Monday march 11 t h lecture 20: Marine euphotic wate rs are primarily oli gotrophic: Two adaptive measures related to this: 1. Genome streamlining: the two most prevalent marine and cyanobacteria are: Prochlorococcus may be the most abundant, and smallest known, photosynthetic organism on the plant: oxygenic phototrophs: they are photosynthetic (fix co2) Prochlorococcus and synechococcus ecotypes determined, in part, by the prevailing nutrient conditions, light level, and genome streamlining: the variety and concentration of nutrients is far more variable compared to surface and deeper water. But how can they be the same species when they are so different: question: how do we define members of the same species. Pelagibacter ubique: identified through the gos as a member of the sar 11 clade. First cultured member to be sequenced, took ten years to figure out how to culture it. Sar clades: identified through high through-put sequencing (hts) and phylogenetic analyses of.
