Phylogenetic Trees

Phylogenetic trees allow us a visual of the taxonomy and overall placement of an organism in regards to its closest relatives and other groups that are much farther away.  A fairly broad phylogenetic tree is shown first, where Streptomyces griseus would be found under the gram positive section of the bacteria:

The phylogenetic tree of life!

(Provided by The National Oceanic and Atmospheric Administration)

Broad phylogenetic trees like this one above offers perspective as to what other groups of bacteria are closely related to the gram positive bacteria.  From this it can be gathered that the cyanobacteria and the proteobacteria are the closest groups of bacteria to the gram positives.

Looking at a more detailed tree can give a more in depth view into the species that are most closely related to our bacteria.  The phylogenetic tree below conveys this idea:

A reduced phylogenetic tree

This phylogenetic tree has been simplified for clarity, as there are many species of streptomycin; which is visible even by this highly reduced tree.  How this data was achieved was through looking at the "16S rRNA gene by a method of multilocus sequence analysis," (Yinping, 2008).  By looking at this tree it can be inferred that the closest relative to Streptomyces griseusare other streptomyces species.

From looking at both of these trees and understanding the vast levels of clarification of species from one another we can begin to appreciate the amount differentiation between the broad categories of organisms all the way to very minor changes found between organisms at the species level.

Now, we'll dive into the ground and take a look at where and how this bacteria lives.

Six Feet Under