Genetic dissection of symbiotic nitrogen fixation (SNF) in the model legume Medicago truncatula
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A Snapshot of Functional Genetic Studies in Medicago truncatula
In the current context of food security, increase of plant protein production in a sustainable manner represents one of the major challenges of agronomic research, which could be partially resolved by increased cultivation of legume crops. Medicago truncatula is now a well-established model for legume genomic and genetic studies. With the establishment of genomics tools and mutant populations i...
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Legume crops present important agronomical and environmental advantages mainly due to their capacity to reduce atmospheric N2 to ammonium via symbiotic nitrogen fixation (SNF). This process is very sensitive to abiotic stresses such as drought, but the mechanism underlying this response is not fully understood. The goal of the current work is to compare the drought response of two legumes with ...
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The nitrogen-fixing symbiosis between legume plants and Rhizobium bacteria is the most prominent plant-microbe endosymbiotic system and, together with mycorrhizal fungi, has critical importance in agriculture. The introduction of two model legume species, Lotus japonicus and Medicago truncatula, has enabled us to identify a number of host legume genes required for symbiosis. A total of 26 genes...
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Symbiotic nitrogen fixation (SNF) in legume root nodules requires differentiation and integration of both plant and bacterial metabolism. Classical approaches of biochemistry, molecular biology, and genetics have revealed many aspects of primary metabolism in legume nodules that underpin SNF. Functional genomics approaches, especially transcriptomics and proteomics, are beginning to provide a m...
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1 A standard framework for facilitating the phenotyping of the shoot part (D. Moreau) 2 Acetylene reduction assay (ARA): protocol for estimating nitrogenase activity in M. truncatula root nodules (D. Moreau) 3 Techniques for phenotyping root architecture and nodulation development (V. Bourion, S. Fournier, H. De Larambergue and G. Duc) 4 C and N flux determination (C. Salon, A.S. Voisin, C. Jeu...
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