@article {369,
	title = {Phylogenetic clustering of soil microbial communities by 16S rRNA but not 16S rRNA genes.},
	journal = {Appl Environ Microbiol},
	volume = {78},
	year = {2012},
	month = {2012 Apr},
	pages = {2459-61},
	abstract = {We evaluated phylogenetic clustering of bacterial and archaeal communities from redox-dynamic subtropical forest soils that were defined by 16S rRNA and rRNA gene sequences. We observed significant clustering for the RNA-based communities but not the DNA-based communities, as well as increasing clustering over time of the highly active taxa detected by only rRNA.},
	keywords = {Archaea, Bacteria, Biodiversity, Cluster Analysis, Ecosystem, Genes, rRNA, Oligonucleotide Array Sequence Analysis, Oxidation-Reduction, Phylogeny, RNA, Ribosomal, 16S, Soil Microbiology, Trees, Tropical Climate},
	issn = {1098-5336},
	doi = {10.1128/AEM.07547-11},
	author = {Deangelis, Kristen M and Firestone, Mary K}
}
@article {374,
	title = {Effects of selected root exudate components on soil bacterial communities.},
	journal = {FEMS Microbiol Ecol},
	volume = {77},
	year = {2011},
	month = {2011 Sep},
	pages = {600-10},
	abstract = {Low-molecular-weight organic compounds in root exudates play a key role in plant-microorganism interactions by influencing the structure and function of soil microbial communities. Model exudate solutions, based on organic acids (OAs) (quinic, lactic, maleic acids) and sugars (glucose, sucrose, fructose), previously identified in the rhizosphere of Pinus radiata, were applied to soil microcosms. Root exudate compound solutions stimulated soil dehydrogenase activity and the addition of OAs increased soil pH. The structure of active bacterial communities, based on reverse-transcribed 16S rRNA gene PCR, was assessed by denaturing gradient gel electrophoresis and PhyloChip microarrays. Bacterial taxon richness was greater in all treatments than that in control soil, with a wide range of taxa (88-1043) responding positively to exudate solutions and fewer (<24) responding negatively. OAs caused significantly greater increases than sugars in the detectable richness of the soil bacterial community and larger shifts of dominant taxa. The greater response of bacteria to OAs may be due to the higher amounts of added carbon, solubilization of soil organic matter or shifts in soil pH. Our results indicate that OAs play a significant role in shaping soil bacterial communities and this may therefore have a significant impact on plant growth.},
	keywords = {Bacteria, DNA, Bacterial, Molecular Sequence Data, Organic Chemicals, Phylogeny, Pinus, Plant Exudates, Plant Roots, Rhizosphere, RNA, Ribosomal, 16S, Soil, Soil Microbiology},
	issn = {1574-6941},
	doi = {10.1111/j.1574-6941.2011.01150.x},
	author = {Shi, Shengjing and Richardson, Alan E and O{\textquoteright}Callaghan, Maureen and Deangelis, Kristen M and Jones, Eirian E and Stewart, Alison and Firestone, Mary K and Condron, Leo M}
}
