Bacterial Phylogenetic Diversity — Proteobacteria, Actinobacteria, and Deep Lineages Explained | Chapter 16 from Brock Biology of Microorganisms
Bacterial Phylogenetic Diversity — Proteobacteria, Actinobacteria, and Deep Lineages Explained | Chapter 16 from Brock Biology of Microorganisms Chapter 16 of Brock Biology of Microorganisms shifts the lens from ecological and metabolic diversity to evolutionary relationships, offering a panoramic view of bacterial phylogeny. By analyzing 16S rRNA gene sequences, microbiologists have uncovered more than 80 bacterial phyla. This chapter highlights the most well-studied groups—such as Proteobacteria, Actinobacteria, Firmicutes, and Bacteroidetes—while also introducing lesser-known and deeply branching lineages that expand our understanding of the microbial tree of life. Watch the full video summary below and subscribe to Last Minute Lecture for more concise, high-yield biology chapter reviews. Proteobacteria: The Largest and Most Diverse Bacterial Phylum All Proteobacteria are gram-negative and exhibit extensive metabolic diversity, encompassing phototrophs, chemolithotro...