Genetics and Genomics of Symbiotic Nitrogen Fixation in Legumes: Past, Present and Future

Michael Udvardi, Celine Mens and Estelle Grundy

European Review, 2024, vol. 32, issue 4, 383-397

Abstract: Legumes are a large and diverse family of plants that provide us with food, feed, fuel and feedstocks for industry. They can use atmospheric di-nitrogen for growth, via symbiotic nitrogen fixation (SNF) with bacteria called rhizobia, making them key to sustainable agricultural systems. There are opportunities to increase SNF in legumes to help tackle critical challenges related to the overuse of fertilizer nitrogen in agriculture. The last two decades have seen enormous progress in our understanding of the genetics of SNF, although this is yet to be leveraged to improve SNF in legumes. In principle, two main plant-based approaches exist to improve SNF, one involving genetic engineering and the other using existing natural variation in this complex trait. These approaches are not mutually exclusive and now is an opportune time to attempt to increase SNF in legumes via plant genetics and genomics.

Date: 2024
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