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Registro Completo |
Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
Data corrente: |
20/09/2013 |
Data da última atualização: |
19/05/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
CRUZ, J. L.; ALVES, A. A. C.; LECAIN, DANIEL R.; ELLIS, D. D.; MORGAN, J. A. |
Afiliação: |
JAILSON LOPES CRUZ, CNPMF; ALFREDO AUGUSTO CUNHA ALVES, CNPMF; DANIEL R. LECAIN, USDA-ARS, Rangeland Resources Research Unit; DAVID D. ELLIS, National Center for Genetic Resources Preservation, USDA-ARS; JACK A. MORGAN, USDA-ARS, Rangeland Resources Research Unit. |
Título: |
Effect of elevated CO2 concentration and nitrate: ammonium ratios on gas exchange and growth of cassava (Manihot esculenta Crantz). |
Ano de publicação: |
2014 |
Fonte/Imprenta: |
Plant and Soil, v.374, p.33-43, 2014. |
ISSN: |
1573-5036 |
DOI: |
10.1007/s11104-013-1869-8 |
Idioma: |
Inglês |
Notas: |
Plublished online: 10 August 2013. |
Conteúdo: |
Aims This study evaluated how different nitrogen forms affect growth and photosynthetic responses of cassava to CO2 concentration. Methods Cassava was grown in 14-L pots in a greenhouse at 390 or 750 ppm of CO2. Three nitrogen treatments were applied: (a) 12mM NO3 , (b) 6mM NO3 + 6mM NH4 +, and (c) 12mM NH4 +. Results Thirty-six days after treatments began, plants grown under elevated CO2 and fertilized only with NO3 (750_NO3) had photosynthetic rates similar to plants grown under 390_NO3, indicating significant photosynthetic acclimation to CO2. In contrast, photosynthetic rates at elevated CO2 increased as NH4 + increased in the nutrient solution, such that photosynthetic acclimation was reduced for plants fertilized with only NH4 +. However, this positive effect of NH4 + on photosynthesis was not observed in more advanced growth stages, and the toxic effects of NH4 + severely reduced total dry mass for these plants measured at the end of the experiment. Conclusions Our results indicate that cassava will respond with increased biomass accumulation in response to raising atmospheric CO2 levels, and that N form can have an important impact on the photosynthetic response. However, the positive effect of NH4 + fertilization on cassava photosynthetic CO2 response eventually led to a toxicity problem that reduced biomass production. The challenge is to determine how to manage NH4 + fertilization so that the photosynthetic benefit observed in the initial phase may persist throughout the crop cycle. MenosAims This study evaluated how different nitrogen forms affect growth and photosynthetic responses of cassava to CO2 concentration. Methods Cassava was grown in 14-L pots in a greenhouse at 390 or 750 ppm of CO2. Three nitrogen treatments were applied: (a) 12mM NO3 , (b) 6mM NO3 + 6mM NH4 +, and (c) 12mM NH4 +. Results Thirty-six days after treatments began, plants grown under elevated CO2 and fertilized only with NO3 (750_NO3) had photosynthetic rates similar to plants grown under 390_NO3, indicating significant photosynthetic acclimation to CO2. In contrast, photosynthetic rates at elevated CO2 increased as NH4 + increased in the nutrient solution, such that photosynthetic acclimation was reduced for plants fertilized with only NH4 +. However, this positive effect of NH4 + on photosynthesis was not observed in more advanced growth stages, and the toxic effects of NH4 + severely reduced total dry mass for these plants measured at the end of the experiment. Conclusions Our results indicate that cassava will respond with increased biomass accumulation in response to raising atmospheric CO2 levels, and that N form can have an important impact on the photosynthetic response. However, the positive effect of NH4 + fertilization on cassava photosynthetic CO2 response eventually led to a toxicity problem that reduced biomass production. The challenge is to determine how to manage NH4 + fertilization so that the photosynthetic benefit observed in the initial phase may persist through... Mostrar Tudo |
Thesagro: |
Mandioca; Manihot Esculenta. |
Thesaurus Nal: |
Calvin cycle; Cassava; Climate change; Nitrogen; Stomatal conductance; Transpiration; water use efficiency. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02452naa a2200313 a 4500 001 1966756 005 2023-05-19 008 2014 bl uuuu u00u1 u #d 022 $a1573-5036 024 7 $a10.1007/s11104-013-1869-8$2DOI 100 1 $aCRUZ, J. L. 245 $aEffect of elevated CO2 concentration and nitrate$bammonium ratios on gas exchange and growth of cassava (Manihot esculenta Crantz).$h[electronic resource] 260 $c2014 500 $aPlublished online: 10 August 2013. 520 $aAims This study evaluated how different nitrogen forms affect growth and photosynthetic responses of cassava to CO2 concentration. Methods Cassava was grown in 14-L pots in a greenhouse at 390 or 750 ppm of CO2. Three nitrogen treatments were applied: (a) 12mM NO3 , (b) 6mM NO3 + 6mM NH4 +, and (c) 12mM NH4 +. Results Thirty-six days after treatments began, plants grown under elevated CO2 and fertilized only with NO3 (750_NO3) had photosynthetic rates similar to plants grown under 390_NO3, indicating significant photosynthetic acclimation to CO2. In contrast, photosynthetic rates at elevated CO2 increased as NH4 + increased in the nutrient solution, such that photosynthetic acclimation was reduced for plants fertilized with only NH4 +. However, this positive effect of NH4 + on photosynthesis was not observed in more advanced growth stages, and the toxic effects of NH4 + severely reduced total dry mass for these plants measured at the end of the experiment. Conclusions Our results indicate that cassava will respond with increased biomass accumulation in response to raising atmospheric CO2 levels, and that N form can have an important impact on the photosynthetic response. However, the positive effect of NH4 + fertilization on cassava photosynthetic CO2 response eventually led to a toxicity problem that reduced biomass production. The challenge is to determine how to manage NH4 + fertilization so that the photosynthetic benefit observed in the initial phase may persist throughout the crop cycle. 650 $aCalvin cycle 650 $aCassava 650 $aClimate change 650 $aNitrogen 650 $aStomatal conductance 650 $aTranspiration 650 $awater use efficiency 650 $aMandioca 650 $aManihot Esculenta 700 1 $aALVES, A. A. C. 700 1 $aLECAIN, DANIEL R. 700 1 $aELLIS, D. D. 700 1 $aMORGAN, J. A. 773 $tPlant and Soil$gv.374, p.33-43, 2014.
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11. | | LEGAT, J. F. A.; RASEIRA, M. do C. B.; MARINO, M. V.; MOTA, R. I.; MOURA NETO, D.; DANIEL, R. Avaliação preliminar das taxas de mortalidade do caranguejo-uçá (Ucides cordatus) após a captura: método tradicional x armadilhas tubulares. In: SIMPÓSIO SOBRE A SUSTENTABILIDADE DA PESCA DO CARANGUEJO-UÇÁ, 1., 2004, Parnaíba. Resumos e Palestras. Parnaíba: UESPI, 2004.Tipo: Resumo em Anais de Congresso |
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12. | | ANDRADE JUNIOR, A. S. de; DIAS, N. da S.; FIGUEREDO JÚNIOR, L. G. M. de; RIBEIRO, V. Q.; DANIEL, R. Fertirrigação nitrogenada e potássica na cultura da melancia. In: CONGRESO LATINOAMERICANO Y DEL CARIBE DE INGENIERIA AGRICOLA - CLIA, 7.; CONGRESO INTERNACIONAL DE INGENIERIA AGRICOLA - CIACH, 5., 2006, Chillán. La ingenieria agrícola en un mundo globalizado. Resúmenes. Chillán, Chile: ALIA, 2006. p. 87Tipo: Resumo em Anais de Congresso |
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14. | | DANIEL, R.; ANDRADE JUNIOR, A. S. de; FIGUEREDO JÚNIOR, L. G. M. de; DIAS, N. da S. Resposta da melancieira à aplicação de nitrogênio via fertirrigação em Parnaiba, PI. In: ENCONTRO DE INICIAÇÃO CIENTIFICA, 1.; PRÊMIO DE INICIAÇÃO CIENTIFICA DA FAPEPI, 1., 2005, [Teresina]. Anais...[Teresina]: FAPEPI, 2005. 1 CD-ROM.Tipo: Artigo em Anais de Congresso |
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15. | | SANTOS, M. da C.; VIÉGAS, P. R. A.; DANIEL, R.; BARBOZA, S. B. S.; LEDO, A. da S. Propagação in vitro do abacaxi cv. imperial com segmentos nodois estiolados. In: ENCONTRO DE INICIAÇÃO CIENTÍFICA, 17., ENCONTRO DE PÓS-GRADUAÇÃO, 3., 2007, São Cristóvão. Anais... São Cristovão: Universidade Federal de Sergipe, 2007. 1 CD-ROM.Tipo: Resumo em Anais de Congresso |
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17. | | ANDRADE JUNIOR, A. S.; DIAS, N. da S.; FIGUEREDO JUNIOR, L. G. M.; DANIEL, R.; RIBEIRO, V. Q. Doses de potássio via fertirrigação na produção e qualidade de frutos de melancia em Parnaíba, PI. Irriga, Botucatu, v. 10, n. 3, p. 205-214, ago/out. 2005.Tipo: Artigo em Periódico Indexado | Circulação/Nível: -- - A |
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20. | | SAMPAIO, A. H. R.; COELHO FILHO, M. A.; COELHO, E. F.; DANIEL, R.; MACHADO, V. V.; MACHADO, E. S. Modelagem da transpiração máxima de limeira ácida 'Tahiti' em semi-árido baiano e efeito da irrigação com déficit controlado, visando o manejo racional de irrigação. In: JORNADA CIENTÍFICA EMBRAPA MANDIOCA E FRUTICULTURA TROPICAL, 2., 2008, Cruz das Almas. Anais... Cruz das Almas: Embrapa Mandioca e Fruticultura Tropical, 2008. RESUMO_0113.Tipo: Resumo em Anais de Congresso |
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