Data released on September 11, 2017
The root microbes play pivotal roles in plant productivity, nutrient uptakes and disease resistance. The root microbial community structure has been extensively investigated by 16S/18S/ITS amplicons and metagenomic sequencing in crops and model plants. However, the functional associations between root microbes and host plant growth are poorly understood. This work investigates the root bacterial community of foxtail millet (Setaria italica) and its potential effects on host plant productivity.
We determined the bacterial composition of 2,882 samples from foxtail millet rhizoplane, rhizosphere and corresponding bulk soils from two well-separated geographic locations by 16S rRNA gene amplicon sequencing. We identified 16,109 OTUs, and defined 187 OTUs as shared rhizoplane core OTUs. The β-diversity analysis revealed that microhabitat was the major factor shaping foxtail millet root bacterial community, followed by geographic locations. Large-scale association analysis identified the potential beneficial bacteria correlated with plant high productivity. Besides, the functional prediction revealed specific pathways enriched in foxtail millet rhizoplane bacterial community.