Evolution of diverse symbiotic phenotypes among native soil bacteria following spread of a genomic island from a rhizobial inoculant

根瘤菌接种物基因组岛扩散后，原生土壤细菌中多种共生表型的进化

• 批准号: DP0880896
• 负责人: Prof John Howieson
• 金额: $ 19.42万
• 依托单位: Murdoch University
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2008
• 资助国家: 澳大利亚
• 起止时间: 2008-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP0880896
• 关键词: Evolution; diverse; symbiotic; phenotypes; among

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.

根瘤菌的共生固氮作用决定了豆科植物蛋白质的品质。澳大利亚农业中的可持续豆类生产取决于用这些细菌的有效菌株接种豆类。不幸的是，接种菌株将DNA转移到其他土壤细菌中，导致RNB的土壤种群竞争固氮，但固氮效果较差。这种DNA转移威胁到澳大利亚农业的20亿美元资产。我们将利用分子微生物生态学来研究共生DNA在RNB中的遗传转移机制，并利用这些知识来预防它。