Biotechnological approaches to develop nitrogen-fixing cereals: A review

Spanish Journal of Agricultural Research

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Title Biotechnological approaches to develop nitrogen-fixing cereals: A review
Creator Boujenna, Asma
Garcia del Moral, Luis F.
Subject nitrogenase
nif genes
O2 tolerance
plant growth-promoting rhizobacteria
biological nitrogen fixation
Description Agricultural yields are often limited by nitrogen (N) availability, especially in countries of the developing world, whereas in industrialized nations the application of chemical N fertilizers has reached unsustainable levels that have resulted in severe environmental consequences. Finding alternatives to inorganic fertilizers is critical for sustainable and secure food production. Although gaseous nitrogen (N2) is abundant in the atmosphere, it cannot be assimilated by most living organisms. Only a selected group of microorganisms termed diazotrophs, have evolved the ability to reduce N2 to generate NH3 in a process known as biological nitrogen fixation (BNF) catalysed by nitrogenase, an oxygen-sensitive enzyme complex. This ability presents an opportunity to improve the nutrition of crop plants, through the introduction into cereal crops of either the N fixing bacteria or the nitrogenase enzyme responsible for N fixation. This review explores three potential approaches to obtain N-fixing cereals: (a) engineering the nitrogenase enzyme to function in plant cells; (b) engineering the legume symbiosis into cereals; and (c) engineering cereals with the capability to associate with N-fixing bacteria.
Publisher Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA)
Date 2021-10-27
Type info:eu-repo/semantics/article
Format application/pdf
Source Spanish Journal of Agricultural Research; Vol. 19 No. 4 (2021); e08R01
Spanish Journal of Agricultural Research; Vol. 19 Núm. 4 (2021); e08R01
Language eng
Rights Copyright (c) 2021 Spanish Journal of Agricultural Research

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