The core root microbiome of sugarcanes cultivated under varying nitrogen fertilizer application

• DOI: 10.1111/1462-2920.12925
• Publication Date: 2015-06-02T02:17:11Z
• Authors: Yun Kit Yeoh; Chanyarat Paungfo...; Paul G. Dennis; Nicole Robinson; Mark A. Ragan; Susanne Schmidt; Philip Hugenholtz
• Keywords: N-15 Natural-Abundance; Crops, Agricultural; Herbaspirillum Spp; Plant-Growth; Endophytic Bacteria; Evolution; Nitrogen; Brazilian Sugarcane; Acetobacter-Diazotrophicus; Plant Roots; 1105 Ecology; Gluconacetobacter-Diazotrophicus; Soil; 03 medical and health sciences; Behavior and Systematics; Nitrogen Fixation; Biomass; Fertilizers; Soil Microbiology; 2. Zero hunger; 580; 0303 health sciences; Agricultural Systems; Bacteria; Microbiota; 2404 Microbiology; Growth Promoting Rhizobacteria; 15. Life on land; Saccharum; Fixing Bacterium

Diazotrophic bacteria potentially supply substantial amounts of biologically fixed nitrogen to crops, but their occurrence may be suppressed by high fertilizer application. Here, we explored the impact rates on presence diazotrophs in field-grown sugarcane with industry-standard or reduced Despite large differences soil microbial communities between test sites, a core root microbiome was identified. The root-enriched taxa overlap those Arabidopsis thaliana raising possibility that certain bacterial families have had long association plants. Reduced application remarkably little effect and did not increase relative abundance root-associated nif gene counts. Correspondingly, low crops lower biomass content, reflecting lack major input nitrogen, indicating manipulating does improve yields enriching diazotrophic populations under conditions. Standard improved corresponding soils higher abundances nitrification denitrification genes. These findings highlight achieving balance maximizing crop minimizing nutrient pollution associated requires understanding how respond use.