Special issue: Cool Earth via Microbes Regulation of Root Nodule Symbiosis by Soybean Rj Genotypes and Rhizobial Effectors Genome Plasticity Depends on Positions both Inside and Outside of the Symbiosis Island of Bradyrhizobium diazoefficiens Promoter Sequences Do Not Solely Govern nosZ Expression Differences between Bradyrhizobium ottawaense and B. diazoefficiens Symbiosis Islands of Bradyrhizobium Determine Relationships with Host Legumes Lespedeza cuneata and Glycine max Kinetics of Nitrous Oxide (N2O)-reducing Activity of Bradyrhizobium ottawaenseby an Automated Analysis Unipolar Polysaccharide-mediated Attachment of the N2O-reducing bacterium Bradyrhizobium ottawaense SG09 to Plant Roots Transcription of Nitrogen Fixation Genes Is Enhanced at Unfavorably High Oxygen Concentrations for Diazotrophic Growth in a Methane-oxidizing Bacterium Expanding the Eco-collection of Methane-oxidizing Bacteria Inhabiting Rice Roots: Cultivation, Isolation, and Genomic Characterization of Isolates Group-specific Quantification of mcrA genes of Methanogenic Archaea and “Candidatus Methanoperedens” by Digital PCR Fusarium Fungi Produce Nitrous Oxide (N2O) from Nitrite (NO2–) in a Model Pot System Simulating the Soybean Rhizosphere Ferrihydrite Addition Activated Geobacteraceae, the Most Abundant Iron-reducing Diazotrophs, and Suppressed Methanogenesis by Heterogeneous Methanogens in Xylan-amended Paddy Soil Microcosms