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Registro Completo |
Biblioteca(s): |
Embrapa Milho e Sorgo. |
Data corrente: |
29/01/2016 |
Data da última atualização: |
25/04/2017 |
Autoria: |
LAVINSKY, A. O.; MAGALHAES, P. C.; ÁVILA, R. G.; DINIZ, M. M.; SOUZA, T. C. de. |
Afiliação: |
PAULO CESAR MAGALHAES, CNPMS. |
Título: |
Partitioning between primary and secondary metabolism of carbon allocated to roots in four maize genotypes under water deficit and its effects on productivity. |
Ano de publicação: |
2015 |
Fonte/Imprenta: |
The Crop Journal, v. 3, p. 379-386, 2015. |
DOI: |
http://dx.doi.org/10.1016/j.cj.2015.04.008 |
Idioma: |
Inglês |
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 |
Palavras-Chave: |
Déficit hídrico. |
Thesagro: |
Amido; Genótipo; Lignina; Milho; Raiz. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02642naa a2200253 a 4500 001 2035551 005 2017-04-25 008 2015 bl uuuu u00u1 u #d 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 : 21 | |
5. | | SILVA, E. M. da; MAGALHAES, P. C.; CASTRO, E. M.; ÁVILA, R. G.; ALMEIDA, L. G. Modifications in the root system, gas exchanges and productivity of sorghum hybrids cultivated under water deficit. Revista Brasileira de Milho e Sorgo, Sete Lagoas, v. 17, n. 3, p. 380-389, 2018.Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 2 |
Biblioteca(s): Embrapa Milho e Sorgo. |
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7. | | AVILA, R. G.; MAGALHAES, P. C.; LAVINSKY, A. O.; ALVARENGA, A. A. de; GOMES JUNIOR, C. C.; CAMPOS, C. N. Alterações nos componentes de trocas gasosas e eficiência do fotossistema II em genótipos de milho submetidos a estresse hídrico no pré-florecimento. In: CONGRESSO NACIONAL DE MILHO E SORGO, 31., 2016, Bento Gonçalves. Milho e sorgo: inovações, mercados e segurança alimentar: anais. Sete Lagoas: Associação Brasileira de Milho e Sorgo, 2016.Tipo: Artigo em Anais de Congresso |
Biblioteca(s): Embrapa Milho e Sorgo. |
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10. | | CAMPOS, C. N.; AVILA, R. G.; CAMPOS, N. N.; SILVA, E. M. da; MAGALHAES, P. C.; ALVARENGA, A. A. de. Silicon improves the productive performance of sorghum in different water conditions. In: BRAZILIAN CONGRESS OF PLANT PHYSIOLOGY, 17., 2019, Cuiabá. Challenges for plant physiology; Food production and sustanability: [abstracts]. Rio Claro, SP: Sociedade Brasileira de Fisiologia Vegetal, 2019. p. 246.Tipo: Resumo em Anais de Congresso |
Biblioteca(s): Embrapa Milho e Sorgo. |
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11. | | REIS, C. O. dos; MAGALHAES, P. C.; AVILA, R. G.; ALMEIDA, L. G.; RABELO, V. M.; CARVALHO, D. T.; CABRAL, D. F.; KARAM, D.; SOUZA, T. C. de. Action of N-succinyl and N,O-dicarboxymethyl chitosan derivatives on chlorophyll photosynthesis and fluorescence in drought-sensitive maize. Journal of Plant Growth Regulation, v. 38, p. 619-630, 2019.Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
Biblioteca(s): Embrapa Milho e Sorgo. |
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12. | | AVILA, R. G.; MAGALHAES, P. C.; SILVA, E. M. da; SOUZA, K. R. D. de; CAMPOS, C. N.; ALVARENGA, A. A. de; SOUZA, T. C. de. Application of silicon to irrigated and water deficit sorghum plants increases yield via the regulation of primary, antioxidant, and osmoregulatory metabolism. Agricultural Water Management, v. 255, 107004, 2021.Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
Biblioteca(s): Embrapa Milho e Sorgo. |
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14. | | ÁVILA, R. G.; MAGALHAES, P. C.; VITORINO, L. C.; BESSA, L. A.; SOUZA, K. R. D. de; QUEIROZ, R. B.; JAKELAITIS, A.; TEIXEIRA, M. B. Chitosan induces sorghum tolerance to water deficits by positively regulating photosynthesis and the production of primary metabolites, osmoregulators, and antioxidants. Journal of Soil Science and Plant Nutrition, v. 23, p. 1156–1172, 2023.Tipo: Artigo em Periódico Indexado |
Biblioteca(s): Embrapa Milho e Sorgo. |
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15. | | ÁVILA, R. G.; MAGALHAES, P. C.; SILVA, E. M. da; ALVARENGA, A. A. de; REIS, C. O. dos; CUSTÓDIO. A. M.; JAKELAITIS, A.; SOUZA, T. C. de. Foliar application of potassium nitrate induces tolerance to water deficit in pre-flowering sorghum plants. Acta Scientiarum. Agronomy, v. 44, n. 1, e53069, 2022.Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
Biblioteca(s): Embrapa Milho e Sorgo. |
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16. | | AVILA, R. G. A.; MAGALHAES, P. C.; ALVARENGA, A. A. de; LAVINSKY, A. de O.; CAMPOS, C. N.; SOUZA, T. C. de; GOMES JÚNIOR, C. C. Drought-tolerant maize genotypes invest in root system and maintain high harvest index during water stress Revista Brasileira de Milho e Sorgo, Sete Lagoas, v. 15, n. 3, p. 450-460, 2016.Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 2 |
Biblioteca(s): Embrapa Milho e Sorgo. |
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17. | | SIMEONE, M. L. F.; MAGALHAES, P. C.; CARNEIRO, N. P.; GOMES JÚNIOR, C. C.; AVILA, R. G.; SOUZA, T. C. de; OLIVEIRA, A. C. de. Ecophysiological characterization of sorghum genotypes submitted to water deficit tolerance. In: GOES, R. J. (org.). Cadeias produtivas e novas tecnologias: aspectos econômicos, ecológicos e sociais. Ponta Grossa: Atena, 2021. p. 69-83.Tipo: Capítulo em Livro Técnico-Científico |
Biblioteca(s): Embrapa Milho e Sorgo. |
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18. | | AVILA, R. G.; MAGALHAES, P. C.; SILVA, E. M. da; GOMES JÚNIOR, C. C.; LANA, U. G. de P.; ALVARENGA, A. A. de; SOUZA, T. C. de. Silicon supplementation improves tolerance to water deficiency in sorghum plants by increasing root system growth and improving photosynthesis. Silicon, v. 12, p. 2545-2554, 2020. Publicado online em 12 dez. 2019.Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
Biblioteca(s): Embrapa Milho e Sorgo. |
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19. | | AVILA, R. G.; MAGALHAES, P. C.; SILVA, E. M. da; ALVARENGA, A. A. de; CAMPOS, C. N.; COSTA, E. L. G.; SILVA, F. G. Silicon supplementation induces tolerance to water deficit in sorghum plants, increasing the growth of the root system and improving the photosynthetic rate. In: BRAZILIAN CONGRESS OF PLANT PHYSIOLOGY, 17., 2019, Cuiabá. Challenges for plant physiology; Food production and sustanability: [abstracts]. Rio Claro, SP: Sociedade Brasileira de Fisiologia Vegetal, 2019. p. 247.Tipo: Resumo em Anais de Congresso |
Biblioteca(s): Embrapa Milho e Sorgo. |
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20. | | GOMES JÚNIOR, C. C.; MARQUES, D. M.; MAGALHAES, P. C.; CARNEIRO, R. F. V.; SOUZA, F. A. de; SOUZA, T. C. de; AVILA, R. G.; VIANA, A. R. S. Alterações fisiológicas e ganho em matéria seca em genótipos de milho inoculados com fungos micorrízicos arbusculares em duas doses de fósforo no solo. In: CONGRESSO NACIONAL DE MILHO E SORGO, 32., 2018, Lavras. Soluções integradas para os sistemas de produção de milho e sorgo no Brasil: resumos. Sete Lagoas: Associação Brasileira de Milho e Sorgo, 2018. p. 89.Tipo: Resumo em Anais de Congresso |
Biblioteca(s): Embrapa Milho e Sorgo. |
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Registros recuperados : 21 | |
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Nenhum registro encontrado para a expressão de busca informada. |
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