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Registro Completo |
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
29/01/2016 |
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Data da última atualização: |
25/04/2017 |
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Autoria: |
LAVINSKY, A. O.; MAGALHAES, P. C.; ÁVILA, R. G.; DINIZ, M. M.; SOUZA, T. C. de. |
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Afiliação: |
PAULO CESAR MAGALHAES, CNPMS. |
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Título: |
Partitioning between primary and secondary metabolism of carbon allocated to roots in four maize genotypes under water deficit and its effects on productivity. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
The Crop Journal, v. 3, p. 379-386, 2015. |
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DOI: |
http://dx.doi.org/10.1016/j.cj.2015.04.008 |
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Idioma: |
Inglês |
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Conteúdo: |
Plants may respond to drought by altering biomass allocation to shoots and roots or by changing the metabolic activities in these organs. To determine how drought changes the partitioning of carbon allocated to growth and secondary metabolism in maize roots and how it affects photosynthesis (A) and productivity in maize, we evaluated leaf gas exchange, yield componentes, root morphology, and primary and secondary metabolites including total soluble sugars (TSS), starch (S), phenolics (PHE), and lignin (LIG). Data were collected from pot-grown plants of four maize genotypes: BRS 1010 and 2B710 (sensitive genotypes) and DKB390 and BRS1055 (tolerant genotypes) under two soil water tensions: field capacity (FC,-18 kPa) and water deficit (WD,-138 kPa). WD was applied at the pre-flowering stage for 12 days and then the water supply was restored and maintained at optimum levels until the end of the cycle. For genotype BRS 1055 under FC, the greatest A did not result in greater grain biomass (DGB) because the accumulated photoassimilates had already filled the cells, and thus the excessive TSS synthesized in leaves was allocated to roots in large amounts. However, the sharp decrease in A caused by WD imposition in this genotype did not affect the influx pressure of leaf TSS, which was due largely to conversion of primary metabolites to PHE compounds to increase the length of fine roots. In leaves of DKB390 under WD, both S and TSS were reduced, whereas PHE were increased to prevent excessive water loss and xylem cavitation. Under WD, both BRS1010 and 2B710 genotypes displayed reduced allocation of biomass to shoots and roots and LIG content in leaves, as well as lower A and DGB values. In BRS1010 this response was coupled to S decrease in leaves and TSS increase in roots, whereas in 2B710 there was a concomitant S increase in roots. MenosPlants may respond to drought by altering biomass allocation to shoots and roots or by changing the metabolic activities in these organs. To determine how drought changes the partitioning of carbon allocated to growth and secondary metabolism in maize roots and how it affects photosynthesis (A) and productivity in maize, we evaluated leaf gas exchange, yield componentes, root morphology, and primary and secondary metabolites including total soluble sugars (TSS), starch (S), phenolics (PHE), and lignin (LIG). Data were collected from pot-grown plants of four maize genotypes: BRS 1010 and 2B710 (sensitive genotypes) and DKB390 and BRS1055 (tolerant genotypes) under two soil water tensions: field capacity (FC,-18 kPa) and water deficit (WD,-138 kPa). WD was applied at the pre-flowering stage for 12 days and then the water supply was restored and maintained at optimum levels until the end of the cycle. For genotype BRS 1055 under FC, the greatest A did not result in greater grain biomass (DGB) because the accumulated photoassimilates had already filled the cells, and thus the excessive TSS synthesized in leaves was allocated to roots in large amounts. However, the sharp decrease in A caused by WD imposition in this genotype did not affect the influx pressure of leaf TSS, which was due largely to conversion of primary metabolites to PHE compounds to increase the length of fine roots. In leaves of DKB390 under WD, both S and TSS were reduced, whereas PHE were increased to prevent ... Mostrar Tudo |
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Palavras-Chave: |
Déficit hídrico. |
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Thesagro: |
Amido; Genótipo; Lignina; Milho; Raiz. |
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Categoria do assunto: |
-- |
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Marc: |
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024 7 $ahttp://dx.doi.org/10.1016/j.cj.2015.04.008$2DOI
100 1 $aLAVINSKY, A. O.
245 $aPartitioning between primary and secondary metabolism of carbon allocated to roots in four maize genotypes under water deficit and its effects on productivity.$h[electronic resource]
260 $c2015
520 $aPlants may respond to drought by altering biomass allocation to shoots and roots or by changing the metabolic activities in these organs. To determine how drought changes the partitioning of carbon allocated to growth and secondary metabolism in maize roots and how it affects photosynthesis (A) and productivity in maize, we evaluated leaf gas exchange, yield componentes, root morphology, and primary and secondary metabolites including total soluble sugars (TSS), starch (S), phenolics (PHE), and lignin (LIG). Data were collected from pot-grown plants of four maize genotypes: BRS 1010 and 2B710 (sensitive genotypes) and DKB390 and BRS1055 (tolerant genotypes) under two soil water tensions: field capacity (FC,-18 kPa) and water deficit (WD,-138 kPa). WD was applied at the pre-flowering stage for 12 days and then the water supply was restored and maintained at optimum levels until the end of the cycle. For genotype BRS 1055 under FC, the greatest A did not result in greater grain biomass (DGB) because the accumulated photoassimilates had already filled the cells, and thus the excessive TSS synthesized in leaves was allocated to roots in large amounts. However, the sharp decrease in A caused by WD imposition in this genotype did not affect the influx pressure of leaf TSS, which was due largely to conversion of primary metabolites to PHE compounds to increase the length of fine roots. In leaves of DKB390 under WD, both S and TSS were reduced, whereas PHE were increased to prevent excessive water loss and xylem cavitation. Under WD, both BRS1010 and 2B710 genotypes displayed reduced allocation of biomass to shoots and roots and LIG content in leaves, as well as lower A and DGB values. In BRS1010 this response was coupled to S decrease in leaves and TSS increase in roots, whereas in 2B710 there was a concomitant S increase in roots.
650 $aAmido
650 $aGenótipo
650 $aLignina
650 $aMilho
650 $aRaiz
653 $aDéficit hídrico
700 1 $aMAGALHAES, P. C.
700 1 $aÁVILA, R. G.
700 1 $aDINIZ, M. M.
700 1 $aSOUZA, T. C. de
773 $tThe Crop Journal$gv. 3, p. 379-386, 2015.
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Embrapa Milho e Sorgo (CNPMS) |
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| Registros recuperados : 8 | |
| 2. |  | SILVEIRA, P. S. da; PEIXOTO, C. P.; LEDO, C. A. da S.; PASSOS, A. R.; BLOISI, A. M.; BORGES, V. P. Componentes de produção de amendoim em diferentes épocas de semeadura e densidades de plantas. Magistra, Cruz das Almas-BA, v. 25, n. 3/4, p.182-190, jul./dez., 2013.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 3 |
| Biblioteca(s): Embrapa Mandioca e Fruticultura. |
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| 3. | | SOUZA, L. B. de; PEIXOTO, C. P.; SILVEIRA, P. S. da; LEDO, C. A. da S.; SANTOS, V. P.; SANTOS, A. P. S. G. dos. Características agronômicas e rendimento de girassol em diferentes épocas de semeadura e populações de plantas no Recôncavo da Bahia. Bioscience Journal .,Uberlandia, v. 30, supplement 1, p. 90-100, June, 2014.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Mandioca e Fruticultura. |
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| 4. | | ALMEIDA, J. de; PEIXOTO, C. P.; LEDO, C. A. da S.; COSTA, B. M. da; SANTOS, C. A. C. dos; SILVEIRA, P. S. da. Desenvolvimento da palma forrageira Opuntia fícus-indica Mill sob adubações química e orgânica. In: SIMPÓSIO BAIANO DE EDUCAÇÃO AMBIENTAL, 2., 2008, Cruz das Almas. Em busca do consumo racional e sustentável. Cruz das Almas: [SBEA], 2008.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Mandioca e Fruticultura. |
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| 5. | | SILVA, S. X. de B.; SILVEIRA, P. S. da; SILVA, M. P. L. da; SOUZA, L. S. S.; SILVA, F. da; TRINDADE, A. V. Colonização micorrízica autóctone em soja hortaliça sob distintas adubações orgânicas. In: CONGRESSO BRASILEIRO DE AGROECOLOGIA, 6.; CONGRESSO LATINO-AMERICANO DE AGROECOLOGIA, 2., 2009, Curitiba. Agricultura familiar e camponesa: experiências passadas e presentes construindo um futuro sustentável: [anais...]. Curitiba: ABA: SOCLA, 2009. p. 4076-4080. 1 CD-ROM. pdf 3996.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Mandioca e Fruticultura. |
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| 6. | | SOUZA, L. H. B. de; PEIXOTO, C. P.; LEDO, C. A. da S.; SILVEIRA, P. S. da; OLIVEIRA, de D.; SANTOS, J. M. da S. dos. Índices fisiológicos de girassol em diferentes épocas de semeadura e densidade de plantas no Recôncavo da Bahia. Magistra, Cruz das Almas - BA: v. 25, n. 2, p. 94-108, abr./jun. 2013.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 3 |
| Biblioteca(s): Embrapa Mandioca e Fruticultura. |
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| 7. | | SILVEIRA, P. S. DA; BORGES, V. P.; LINO, L. S. M.; CARVALHO, N. H.; JESUS, J. A. DE; SILVA, A. V. O. DA; SILVA, S. DE O. E; SEREJO, J. A. dos S. Densidade de estomatos e massa foliar para pré-seleção de poliploides induzidos por duplicação de cromossomos in vitro em Musa spp. In: CONGRESSO BRASILEIRO DE RECURSOS GENÉTICOS, 3., 2014, Santos. Anais... Brasília, DF: Sociedade Brasileira de Recursos Genéticos, 2014.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Mandioca e Fruticultura. |
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| 8. | | SANTOS, C. A. C. dos; VIEIRA, E. L.; PEIXOTO, C. P.; LEDO, C. A. da S.; BENJAMIM, D. A.; GONÇALVES, C. de A.; SILVEIRA, P. S. da; SANTOS, C. R. S. dos. Giberelina na germinação de sementes e vigor de plântulas de maracujazeiro amarelo. In: CONGRESSO BRASILEIRO DE FISIOLOGIA VEGETAL, 12., 2009, Fortaleza. Desafios para a produção de alimentos e bioenergia. Fortaleza: UFC: Embrapa Agroindústria Tropical, 2009. 1 CD-ROM. pdf 186.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Mandioca e Fruticultura. |
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| Registros recuperados : 8 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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