Symbiotic Nitrogen Fixation and the Challenges to Its Extension to Nonlegumes
Florence Mus,Matthew B. Crook,Kevin Garcia,Amaya M. Garcia Costas,Barney A. Geddes,Evangelia D. Kouri,Ponraj Paramasivan,Min-Hyung Ryu,Giles E. D. Oldroyd,Philip S. Poole,Michael K. Udvardi,Christopher A. Voigt,Jean-Michel Ané,John W. Peters +13 more
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TLDR
In this article, a minireview highlights the fundamental advances in our understanding of biological nitrogen fixation in the context of a blueprint for expanding symbiotic nitrogen fixation to a greater diversity of crop plants through synthetic biology.Abstract:
Access to fixed or available forms of nitrogen limits the productivity of crop plants and thus food production. Nitrogenous fertilizer production currently represents a significant expense for the efficient growth of various crops in the developed world. There are significant potential gains to be had from reducing dependence on nitrogenous fertilizers in agriculture in the developed world and in developing countries, and there is significant interest in research on biological nitrogen fixation and prospects for increasing its importance in an agricultural setting. Biological nitrogen fixation is the conversion of atmospheric N2 to NH3, a form that can be used by plants. However, the process is restricted to bacteria and archaea and does not occur in eukaryotes. Symbiotic nitrogen fixation is part of a mutualistic relationship in which plants provide a niche and fixed carbon to bacteria in exchange for fixed nitrogen. This process is restricted mainly to legumes in agricultural systems, and there is considerable interest in exploring whether similar symbioses can be developed in nonlegumes, which produce the bulk of human food. We are at a juncture at which the fundamental understanding of biological nitrogen fixation has matured to a level that we can think about engineering symbiotic relationships using synthetic biology approaches. This minireview highlights the fundamental advances in our understanding of biological nitrogen fixation in the context of a blueprint for expanding symbiotic nitrogen fixation to a greater diversity of crop plants through synthetic biology.read more
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The Role of Soil Microorganisms in Plant Mineral Nutrition—Current Knowledge and Future Directions
TL;DR: This review focuses on the interaction of plants and root associated bacteria enhancing plant mineral nutrition, summarizing the current knowledge in several research fields that can converge to improve the understanding of the molecular mechanisms underpinning this phenomenon.
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Revitalization of plant growth promoting rhizobacteria for sustainable development in agriculture.
Sushanto Gouda,Rout George Kerry,Gitishree Das,Spiros Paramithiotis,Han-Seung Shin,Jayanta Kumar Patra +5 more
TL;DR: Plant growth promoting rhizobacteria (PGPR) has been functioning as a co-evolution between plants and microbes showing antagonistic and synergistic interactions with microorganisms and the soil.
Evaluación de la diversidad taxonómica y funcional de la comunidad microbiana relacionada con el ciclo del nitrógeno en suelos de cultivo de arroz con diferentes manejos del tamo
Carreño Carreño,Jibda del Pilar +1 more
TL;DR: The impact of the quema de arroz on the microorganismos edaficos in the disponibilidad and ciclaje de nutrientes is poco conocido, es por esto que el retorno de los residuos vegetales al suelo ha been propuesto como una alternativa de manejo eficiente de los residentes pos-cosecha.
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Root phenotypes for improved nutrient capture: an underexploited opportunity for global agriculture.
TL;DR: Although the current understanding is sufficient to deploy root phenotypes for improved nutrient capture in crop breeding, this complex topic does not receive the resources it merits in either applied or basic plant biology.
Journal ArticleDOI
Nitrogen fixation in a landrace of maize is supported by a mucilage-associated diazotrophic microbiota.
Allen Van Deynze,Pablo Zamora,Pierre-Marc Delaux,Cristobal Heitmann,Dhileepkumar Jayaraman,Shanmugam Rajasekar,Danielle Graham,Junko Maeda,Donald Gibson,Kevin D. Schwartz,Alison M. Berry,Srijak Bhatnagar,Guillaume Jospin,Aaron E. Darling,Richard Jeannotte,Javier Lopez,Bart C. Weimer,Jonathan A. Eisen,Howard Yana Shapiro,Jean-Michel Ané,Alan B. Bennett +20 more
TL;DR: Analysis of the mucilage microbiota of an indigenous landrace of maize grown in nitrogen-depleted soils in the Sierra Mixe region of Oaxaca, Mexico indicated that it was enriched in taxa for which many known species are diazotrophic, was enriched for homologs of genes encoding nitrogenase subunits, and harbored active nitrogenase activity.
References
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