Abstract
Rhizobium leguminosarum bv. trifolii SRDI565 (syn. N8-J) is an aerobic, motile, Gram-negative, non-spore-forming rod. SRDI565 was isolated from a nodule recovered from the roots of the annual clover Trifolium subterraneum subsp. subterraneum grown in the greenhouse and inoculated with soil collected from New South Wales, Australia. SRDI565 has a broad host range for nodulation within the clover genus, however N2-fixation is sub-optimal with some Trifolium species and ineffective with others. Here we describe the features of R. leguminosarum bv. trifolii strain SRDI565, together with genome sequence information and annotation. The 6,905,599 bp high-quality-draft genome is arranged into 7 scaffolds of 7 contigs, contains 6,750 protein-coding genes and 86 RNA-only encoding genes, and is one of 100 rhizobial genomes sequenced as part of the DOE Joint Genome Institute 2010 Genomic Encyclopedia for Bacteria and Archaea-Root Nodule Bacteria (GEBA-RNB) project.
Highlights
Plant available nitrogen is a precious commodity in many agricultural soils and the most commonly limiting nutrient in plant growth
This is a costly option as the price of nitrogenous fertilizer is connected to the cost of fossil fuels required for its production
A more environmentally sustainable option is to exploit the process of biological nitrogen fixation that occurs in the symbiosis between legumes and rhizobia [2]
Summary
Plant available nitrogen is a precious commodity in many agricultural soils and the most commonly limiting nutrient in plant growth. The application of industrially fixed nitrogenous fertilizer can meet the demand for N This is a costly option as the price of nitrogenous fertilizer is connected to the cost of fossil fuels required for its production. A more environmentally sustainable option is to exploit the process of biological nitrogen fixation that occurs in the symbiosis between legumes and rhizobia [2]. In this symbiotic association, rhizobia reduce atmospheric dinitrogen (N2) into bioavailable N that can be used by the plant for growth. The N2-fixation capacity of the symbioses established by different combinations of clover hosts (Trifolium spp.) and strains of R. l. The N2-fixation capacity of the symbioses established by different combinations of clover hosts (Trifolium spp.) and strains of R. l. trifolii can vary from 10 to 130% when compared to an effective host-strain combination [3,4,5,6,7,8,9]
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