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Symbiotic nitrogen fixation and the challenges to its extension to nonlegumes

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.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1128/aem.01055-16

Authors


More by this author
Role:
Author
ORCID:
0000-0003-0821-1024
More by this author
Institution:
University of Oxford
Division:
MPLS Division
Department:
Plant Sciences
Role:
Author


Publisher:
American Society for Microbiology
Journal:
Applied and Environmental Microbiology More from this journal
Volume:
82
Issue:
13
Pages:
3698-3710
Publication date:
2016-04-15
Acceptance date:
2016-04-10
DOI:
EISSN:
1098-5336
ISSN:
0099-2240
Pmid:
27084023


Language:
English
Keywords:
Pubs id:
pubs:617733
UUID:
uuid:2587c3d4-c1e5-4873-a776-33e360e5c823
Local pid:
pubs:617733
Source identifiers:
617733
Deposit date:
2018-01-30

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