MBIO 1010 Chapter Notes - Chapter 14: Light-Independent Reactions, Heterocyst, Chlamydiae
6 Dec 2016
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Microbes are grouped into phyla based on evolutionary relationships. Most often based on 16s rrna gene sequence. Groups microbes based on the activities they carry out. The only one that functions to do oxygenic phototrophy is cyanobacteria. Most prokaryotes cannot be cultured in the lab (yet) Some phyla are well studied in the lab. Some are know only from 16s sequences or metagenomic studies: fig. Green bars: organisms that can be cultured in the lab. Cost effectiveness of culturing things in the lab has gone down. Can do whole genome sequencing of organisms in the lab gives us a lot of power. Endosymbioant theory: early eukaryote that engulphed the cyanobacteria, and they became codependent and that became the present chloroplast unlike chloroplasts they have cell walls: contain peptidoglycan gram negative cell wall type they are prokaryotes fig. Widely distributed in terrestrial, freshwarer, and marine habitats. One of the most abundant orgnaisms on earth.
