The use of reference genomes allows researchers to improve the assembly of the most abundant microbial species, but this approach is limited by the small subset of microbial phyla for which sequenced genomes are available.
The Hall of Biodiversity at the American Museum of Natural History in New York features a "wall of life" that shows, in evolutionary, tree-of-life phylogenetic fashion, a pot pourri of species from each of the major subdivisions of the fungal, plant and animal kingdoms (along with a healthy subset of microbial life)—using preserved specimens and models.
Phenotypic heterogeneity in an isogenic, microbial population enables a subset of the population to persist under stress.
A common survival strategy of microorganisms subjected to stress involves the generation of phenotypic heterogeneity in the isogenic microbial population enabling a subset of the population to survive under stress.
A subset of microbial genera (Enterobacter, Microbacterium and Paenibacillus, followed by Pantoea species, Stenotrophomonas and Bacillus) appeared to be somewhat conserved across the various host genotype and pot treatment combinations, including plants grown on sterilized sand, suggesting that these microbial genera were inherited rather than soil derived.
"These newly described ultra-small bacteria are an example of a subset of the microbial life on Earth that we know almost nothing about," Dr. Jill Banfield, a senior scientist in Berkeley Lab's Earth Sciences Division, who helped research the bacteria, said in a written statement.
The data taken together suggest that the lignin had an adverse effect on all but a specific subset of the microbial community, and this select population is likely able to enzymatically access and assimilate carbon derived from the lignin.
We will measure E. coli across all environmental samples, with direct pathogen measures 80 and microbial source tracking in a subset of samples.
Placed within the greater context of the DGH, we propose that L. casei, and probably other ecologically flexible species, have access to a supragenome whose composition is not exclusive to the species, but instead might be viewed as a subset of the microbial metagenome within a particular niche.
These findings provide additional confirmation that the DGH extends to non-pathogenic species [ 42], and indicate ecologically flexible bacteria like L. casei have access to a supragenome whose composition might be viewed as a subset of the microbial metagenome within a particular ecological niche.
