Evolution of diverse symbiotic phenotypes among native soil bacteria following spread of a genomic island from a rhizobial inoculant. The quality of legume protein depends on symbiotic nitrogen fixation by root nodule bacteria (RNB). Sustainable legume production in Australian agriculture depends on legume inoculation with effective strains of these bacteria. Unfortunately inoculant strains transfer DNA to other soil bacteria resulting in soil populations of RNB that compete for nodulation but a ....Evolution of diverse symbiotic phenotypes among native soil bacteria following spread of a genomic island from a rhizobial inoculant. The quality of legume protein depends on symbiotic nitrogen fixation by root nodule bacteria (RNB). Sustainable legume production in Australian agriculture depends on legume inoculation with effective strains of these bacteria. Unfortunately inoculant strains transfer DNA to other soil bacteria resulting in soil populations of RNB that compete for nodulation but are less effective in nitrogen fixation. This transfer of DNA threatens a $2 billion asset in Australian agriculture. We will use molecular microbial ecology to investigate the mechanisms of genetic transfer of symbiotic DNA in RNB, and use this knowledge to prevent it.Read moreRead less
Harnessing horizontal gene transfer for sustainable nitrogen fixation. This project aims to investigate natural deoxyribonucleic acid (DNA) transfer from nitrogen-fixing bacteria to indigenous bacteria in Australian soils. This project expects to significantly expand our understanding of the molecular and genetic factors contributing to the evolution of ineffective symbiotic bacteria in these soils. An expected outcome of this project is support development of genetically stable bacterial inocul ....Harnessing horizontal gene transfer for sustainable nitrogen fixation. This project aims to investigate natural deoxyribonucleic acid (DNA) transfer from nitrogen-fixing bacteria to indigenous bacteria in Australian soils. This project expects to significantly expand our understanding of the molecular and genetic factors contributing to the evolution of ineffective symbiotic bacteria in these soils. An expected outcome of this project is support development of genetically stable bacterial inoculants for use in agriculture. Inoculation of legumes with nitrogen-fixing symbiotic bacteria is a cheap and environmentally-friendly alternative to chemical fertilisers and contributes $3-4 billion per annum to Australian economy.Read moreRead less