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Biblioteca(s): |
Embrapa Agrobiologia; Embrapa Soja. |
Data corrente: |
11/11/1992 |
Data da última atualização: |
11/11/1992 |
Autoria: |
VANCE, C. P.; HEICHEL, G. H. |
Afiliação: |
USDA-ARS Plant Science Research, and the Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, Minnesota 55108-1013. |
Título: |
Carbon in N2 fixation: limitation or exquisite adaptation. |
Ano de publicação: |
1991 |
Fonte/Imprenta: |
Annual Review of Plant Physiology and Plant Molecular Biology, v.42, p.373-392, 1991. |
Idioma: |
Inglês Português |
Conteúdo: |
Nodule carbon metabolism and the energy photosynthate requirements for symbiotic N2 fixation have been fertile research topics for many years because of the continuing debate over whether N2 or N03- reduction is more beneficial to crop productivity (38, 50, 58, 85, 98, 99). Interest in the topic continues, driven by several questions of scientific and technological importance. Do the carbon requirements for symbiotic N2 fixation limit productivity of legumes? How does the host plant nodule, functioning for all practical purposes in an O2-limited environment, provide sufficient carbon to the microsymbiont to fuel nitrogenase (N2ase)? Will transforming non-N2-fixing species to fix N2 impair their productivity? Recent observations that leghemoglobin (Lb) may be present in all plant species (4, 9), that rhizobia can elicit nodule-like structures on rice and other monocots (1,13), and that single gene changes in the legume host can result in supernodulating plants (12, 47) provide incentives for understanding the role of carbon pathways in N2 fixation beyond those traditionally advanced for legumes. The objectives of this review are to examine whether N2ase activity is carbon limited, to describle plausible mechanisms whereby plant metabolism adapted to an O2-limited environment to provide carbon for N2 fixarion, and to delineate how O2 diffusion into the nodule may be regulated. It is beyond the scope of this article to detail each aspect of all events impinging upon nodule carbon and nitrogen metabolism. For a more co MenosNodule carbon metabolism and the energy photosynthate requirements for symbiotic N2 fixation have been fertile research topics for many years because of the continuing debate over whether N2 or N03- reduction is more beneficial to crop productivity (38, 50, 58, 85, 98, 99). Interest in the topic continues, driven by several questions of scientific and technological importance. Do the carbon requirements for symbiotic N2 fixation limit productivity of legumes? How does the host plant nodule, functioning for all practical purposes in an O2-limited environment, provide sufficient carbon to the microsymbiont to fuel nitrogenase (N2ase)? Will transforming non-N2-fixing species to fix N2 impair their productivity? Recent observations that leghemoglobin (Lb) may be present in all plant species (4, 9), that rhizobia can elicit nodule-like structures on rice and other monocots (1,13), and that single gene changes in the legume host can result in supernodulating plants (12, 47) provide incentives for understanding the role of carbon pathways in N2 fixation beyond those traditionally advanced for legumes. The objectives of this review are to examine whether N2ase activity is carbon limited, to describle plausible mechanisms whereby plant metabolism adapted to an O2-limited environment to provide carbon for N2 fixarion, and to delineate how O2 diffusion into the nodule may be regulated. It is beyond the scope of this article to detail each aspect of all events impinging upon nodule carb... Mostrar Tudo |
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LEADER 01937naa a2200133 a 4500 001 1458309 005 1992-11-11 008 1991 bl --- 0-- u #d 100 1 $aVANCE, C. P. 245 $aCarbon in N2 fixation$blimitation or exquisite adaptation. 260 $c1991 520 $aNodule carbon metabolism and the energy photosynthate requirements for symbiotic N2 fixation have been fertile research topics for many years because of the continuing debate over whether N2 or N03- reduction is more beneficial to crop productivity (38, 50, 58, 85, 98, 99). Interest in the topic continues, driven by several questions of scientific and technological importance. Do the carbon requirements for symbiotic N2 fixation limit productivity of legumes? How does the host plant nodule, functioning for all practical purposes in an O2-limited environment, provide sufficient carbon to the microsymbiont to fuel nitrogenase (N2ase)? Will transforming non-N2-fixing species to fix N2 impair their productivity? Recent observations that leghemoglobin (Lb) may be present in all plant species (4, 9), that rhizobia can elicit nodule-like structures on rice and other monocots (1,13), and that single gene changes in the legume host can result in supernodulating plants (12, 47) provide incentives for understanding the role of carbon pathways in N2 fixation beyond those traditionally advanced for legumes. The objectives of this review are to examine whether N2ase activity is carbon limited, to describle plausible mechanisms whereby plant metabolism adapted to an O2-limited environment to provide carbon for N2 fixarion, and to delineate how O2 diffusion into the nodule may be regulated. It is beyond the scope of this article to detail each aspect of all events impinging upon nodule carbon and nitrogen metabolism. For a more co 700 1 $aHEICHEL, G. H. 773 $tAnnual Review of Plant Physiology and Plant Molecular Biology$gv.42, p.373-392, 1991.
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Registro original: |
Embrapa Soja (CNPSO) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Recursos Genéticos e Biotecnologia. Para informações adicionais entre em contato com cenargen.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Recursos Genéticos e Biotecnologia. |
Data corrente: |
03/08/2017 |
Data da última atualização: |
15/03/2019 |
Tipo da produção científica: |
Capítulo em Livro Técnico-Científico |
Autoria: |
CAMILLO, J.; BARA, M. T. F.; OLIVEIRA, P. C. de; PAULA, J. R. de; VIEIRA, R. F. |
Afiliação: |
JULCÉIA CAMILLO; MARIA TERESA FREITAS BARA, UFG; PATRYCIA CAIXETA DE OLIVEIRA, UFG; JOSE REALINO DE PAULA, UFG; ROBERTO FONTES VIEIRA, CENARGEN. |
Título: |
Pterodon emarginatus, Pterodon pubescens: sucupira-branca. |
Ano de publicação: |
2018 |
Fonte/Imprenta: |
In: VIEIRA, R. F.; CAMILLO, J.; CORADIN, L. (Ed.). Espécies nativas da flora brasileira de valor econômico atual ou potencial: plantas para o futuro: Região Centro-Oeste. Brasília, DF: MMA, 2018. 1.160 p. (Série Biodiversidade; 44). |
Páginas: |
p. 861-874 |
Idioma: |
Português |
Palavras-Chave: |
Pterodon emarginatus Vogel; Pterodon pubescens (Benth) Benth. |
Thesaurus NAL: |
Fabaceae. |
Categoria do assunto: |
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Marc: |
LEADER 00772naa a2200205 a 4500 001 2073523 005 2019-03-15 008 2018 bl uuuu u00u1 u #d 100 1 $aCAMILLO, J. 245 $aPterodon emarginatus, Pterodon pubescens$bsucupira-branca. 260 $c2018 300 $ap. 861-874 650 $aFabaceae 653 $aPterodon emarginatus Vogel 653 $aPterodon pubescens (Benth) Benth 700 1 $aBARA, M. T. F. 700 1 $aOLIVEIRA, P. C. de 700 1 $aPAULA, J. R. de 700 1 $aVIEIRA, R. F. 773 $tIn: VIEIRA, R. F.; CAMILLO, J.; CORADIN, L. (Ed.). Espécies nativas da flora brasileira de valor econômico atual ou potencial: plantas para o futuro: Região Centro-Oeste. Brasília, DF: MMA, 2018. 1.160 p. (Série Biodiversidade; 44).
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